Water Supply & Demand

MWRA and the Division of Conservation and Recreation keep a daily watch on reservoir levels at Quabbin (412 billion gallon capacity) and Wachusett (65 billion gallons).

Quabbin levels fluctuate with precipitation and watershed runoff while Wachusett levels are kept relatively fixed.

Water System Demand

In September 2024, overall demand on the MWRA system was 238.48 million gallons per day (preliminary)

Water System Demand Archive

Quabbin Reservoir Levels

On September 1, 2024

Elevation: 526.03 feet
Volume: 381 billion gallons
(381,825 billion gallons)
Capacity: 92.6 %

Quabbin Reservoir Levels Archive

Wachusett Reservoir Levels

On September1, 2024

Elevation: 390.42 feet
Volume: 60 billion gallons
(59,714 billion gallons)
Capacity: 90.9 %

Wachusett Reservoir Levels Archive

Precipitation

August 2024 (monthly total)

Quabbin watershed: 03.73 in
Wachusett watershed: 03.55 in

Precipitation Levels Archive

Community Water Use

Monthly and year-to-date water use comparisons for MWRA communities

MWRA Water Demand vs. Safe Yield 1980-2022

Graph detailing the 5-year water running average marked against the safe yield limit.

Water System Demand Archive

In 2019, demand on the MWRA water system averaged 191.8 million gallons per day (mgd).

Based on a detailed analysis of major factors affecting water demand, MWRA projects that system demand will remain well below 300 million gallons per day.

An archive of water system demand data since 1985, when MWRA was created, is below.

Year-to-date average 188.27 million gallons per day*
08/24	238.48
07/24	245.60
06/24	227.53
05/24	200.74
04/24	177.90
03/24	174.48
02/24	173.84
01/24	175.12
* Preliminary

Year-to-date average 190.63 million gallons per day*
12/23	167.96
11/23	172.99
10/23	188.70
09/23	207.18
08/23	212.34
07/23	217.12
06/23	214.60
05/23	207.84
04/23	181.55
03/23	170.80
02/23	177.10
01/23	169.39
* Preliminary

Year-to-date average 207.57 million gallons per day*
12/22	170.20
11/22	181.54
10/22	204.20
09/22	237.86
08/22	257.57
07/22	261.52
06/22	234.13
05/22	211.17
04/22	193.67
03/22	180.82
02/22	181.31
01/22	176.86
* Preliminary

Year-to-date average 191.82 million gallons per day*
12/21	169.65
11/21	175.30
10/21	190.94
09/21	207.47
08/21	221.40
07/21	203.77
06/21	239.83
05/21	202.92
04/21	175.41
03/21	172.25
02/21	175.80
01/21	167.20
* Preliminary

Year-to-date average 195.76 million gallons per day*
12/20	163.15
11/20	166.30
10/20	193.28
09/20	227.74
08/20	246.82
07/20	242.24
06/20	239.23
05/20	190.06
04/20	164.87
03/20	170.30
02/20	172.32
01/20	172.84
* Preliminary

Year-to-date average 191.8 million gallons per day*
12/19	171.30
11/19	172.77
10/19	188.22
09/19	216.90
08/19	231.29
07/19	233.93
06/19	206.89
05/19	182.61
04/19	173.73
03/19	173.05
02/19	173.71
01/19	175.40
* Preliminary

Year-to-date average 199.98 million gallons per day*
12/18	168.16 *
11/18	175.68 *
10/18	189.30*
09/18	229.11 *
08/18	230.82 *
07/18	258.32 *
06/18	233.90 *
05/18	195.34 *
04/18	175.91 *
03/18	170.60 *
02/18	169.29 *
01/18	185.86*
* Preliminary

Year-to-date average 195.40 million gallons per day*
12/17	173.56
11/17	176.46
10/17	205.04
09/17	229.46
08/17	235.39*
07/17	230.49
06/17	211.91
05/17	184.60
04/17	174.73
03/17	170.54
02/17	172.31
01/17	169.57
* Preliminary

Year-to-date average 208.01 million gallons per day*
12/16	152.51
11/16	183.97
10/16	204.39
09/16	234.80
08/16	263.26
07/16	275.97
06/16	258.50
05/16	201.05
04/16	175.16
03/16	173.81
02/16	194.25
01/16	178.47
* Preliminary

Year-to-date average - 2015 206.57 million gallons per day
12/15	173.83
11/15	172.94
10/15	193.49
09/15	250.83
08/15	253.89
07/15	248.47
06/15	223.75
05/15	222.37
04/15	184.84
03/15	193.70
02/15	183.29
01/15	175.39
* Preliminary

Year-to-date average - 2014 200.85 million gallons per day
12/14	172.86
11/14	175.73
10/14	202.94
09/14	236.38
08/14	227.33
07/14	228.99
06/14	218.93
05/14	192.90
04/14	181.48
03/14	181.93
02/14	195.48
01/14	195.24

Average for 2013 202.78 million gallons per day
12/13	189.53
11/13	198.70
10/13	203.98
09/13	221.84
08/13	226.07
07/13	235.90
06/13	211.52
05/13	202.05
04/13	179.02
03/13	184.08
02/13	195.89
01/13	184.76

Average for 2012 194.71 million gallons per day
12/12	175.56
11/12	181.26
10/12	199.57
09/12	218.12
08/12	230.98
07/12	235.06
06/12	204.25
05/12	193.07
04/12	184.19
03/12	171.04
02/12	170.57
01/12	172.90

Average for 2011 196.55 million gallons per day
12/11	186.82
11/11	171.63
10/11	184.49
09/11	202.14
08/11	225.05
07/11	243.44
06/11	216.11
05/11	190.09
04/11	177.45
03/11	179.40
02/11	192.75
01/11	189.26

Average for 2010 204.3 million gallons per day
12/10	172.9
11/10	179.2
10/10	204.9
09/10	239.6
08/10	247.4
07/10	259.5
06/10	218.8
05/10	208.8
04/10	182.3
03/10	178.5
02/10	178.1
01/10	178.6

Average for 2009 194.3 million gallons per day
12/09	174.5
11/09	176.0
10/09	184.4
09/09	210.5
08/09	224.4
07/09	203.7
06/09	206.5
05/09	204.6
04/09	188.2
03/09	184.7
02/09	186.4
01/09	187.6

Average for 2008: 205.6 million gallons per day
12/08	181.9
11/08	188.0
10/08	201.0
09/08	227.2
08/08	232.2
07/08	245.3
06/08	234.0
05/08	204.0
04/08	190.5
03/08	182.8
02/08	187.1
01/08	192.2

Average for 2007: 219.9 million gallons per day
12/07	188.5
11/07	206.6
10/07	226.0
09/07	260.9
08/07	264.3
07/07	248.9
06/07	240.8
05/07	218.9
04/07	192.7
03/07	199.0
02/07	200.5
01/07	191.1

Average for 2006: 211.4 million gallons per day
12/06	189.8
11/06	198.6
10/06	210.7
09/06	222.3
08/06	251.9
07/06	245.3
06/06	221.5
05/06	208.4
04/06	200.9
03/06	196.4
02/06	194.8
01/06	196.8

Average for 2005: 259.2 million gallons per day
12/05	196.0
11/05	198.9
10/05	218.2
09/05	266.2
08/05	285.2
07/05	359.7
06/05	373.4
05/05	330.8
04/05	220.1
03/05	217.4
02/05	223.2
01/05	218.3

Average for 2004: 220.33 million gallons per day
12/04	198.05
11/04	206.84
10/04	217.66
09/04	242.07
08/04	251.00
07/04	245.83
06/04	243.75
05/04	218.96
04/04	202.97
03/04	197.68
02/04	207.84
01/04	211.29

Average for 2003: 224.67 million gallons per day
12/03	196.42
11/03	198.81
10/03	225.07
09/03	246.39
08/03	257.38
07/03	267.78
06/03	231.96
05/03	220.94
04/03	213.07
03/03	210.12
02/03	216.29
01/03	211.76

Average for 2002: 236.01 MGD
12/02	203.94
11/02	208.37
10/02	219.60
09/02	252.12
08/02	302.37
07/02	291.98
06/02	235.43
05/02	236.09
04/02	225.87
03/02	203.86
02/02	225.33
01/02	227.19

Average for 2001: 247.56 million gallons per day
12/01	223.43
11/01	233.83
10/01	250.52
09/01	275.00
08/01	289.33
07/01	278.18
06/01	263.96
05/01	254.33
04/01	217.06
03/01	215.91
02/01	231.29
01/01	237.86

Average for 2000: 251.71 million gallons per day
12/00	233.17
11/00	231.23
10/00	257.71
09/00	282.68
08/00	282.77
07/00	293.83
06/00	262.04
05/00	234.81
04/00	225.90
03/00	230.08
02/00	243.82
01/00	242.50

Average for 1999: 276.24 million gallons per day
12/99	239.68
11/99	251.54
10/99	261.20
09/99	283.88
08/99	324.72
07/99	339.86
06/99	359.87
05/99	273.48
04/99	246.69
03/99	240.00
02/99	244.01
01/99	249.92

Average for 1998: 260.38 million gallons per day
12/98	241.13
11/98	248.53
10/98	266.52
09/98	294.45
08/98	319.38
07/98	298.99
06/98	259.10
05/98	255.45
04/98	232.55
03/98	231.24
02/98	233.82
01/98	243.38

Average for 1997: 260.95 million gallons per day
12/97	239.07
11/97	236.60
10/97	250.63
09/97	292.18
08/97	313.15
07/97	343.54
06/97	312.43
05/97	241.93
04/97	232.45
03/97	220.76
02/97	225.33
01/97	223.37

Average for 1996: 230.35 million gallons per day
12/96	218.96
11/96	226.77
10/96	231.68
09/96	261.91
08/96	289.64
07/96	287.58
06/96	286.60
05/96	547.70
04/96	240.43
03/96	230.18
02/96	245.66
01/96	237.04

Average for 1995: 255.55 million gallons per day
12/95	239.83
11/95	226.71
10/95	235.62
09/95	283.54
08/95	317.87
07/95	315.92
06/95	292.85
05/95	245.23
04/95	235.61
03/95	228.57
02/95	220.37
01/95	224.52

Average for 1994: 254.23 million gallons per day
12/94	220.41
11/94	230.68
10/94	246.70
09/94	254.32
08/94	284.38
07/94	319.37
06/94	296.84
05/94	239.45
04/94	234.77
03/94	234.25
02/94	252.50
01/94	237.08

Average for 1993: 245.76 million gallons per day
12/93	217.23
11/93	220.66
10/93	220.42
09/93	245.34
08/93	286.24
07/93	314.81
06/93	284.96
05/93	241.16
04/93	227.16
03/93	229.62
02/93	231.17
01/93	229.92

Average for 1992: 257.44 million gallons per day
12/92	223.96
11/92	244.53
10/92	263.04
09/92	277.75
08/92	268.85
07/92	281.83
06/92	279.86
05/92	259.29
04/92	243.16
03/92	247.15
02/92	249.53
01/92	250.34

Average for 1991: 279.18 million gallons per day
12/91	249.12
11/91	247.65
10/91	269.64
09/91	278.42
08/91	312.72
07/91	336.67
06/91	314.74
05/91	277.46
04/91	255.72
03/91	256.48
02/91	276.61
01/91	274.95

Average for 1990: 285.10 million gallons per day
12/90	261.65
11/90	271.97
10/90	283.14
09/90	303.31
08/90	316.63
07/90	336.60
06/90	303.38
05/90	262.98
04/90	265.01
03/90	264.00
02/90	264.69
01/90	287.87

Average for 1989: 289.17 million gallons per day
12/89	267.26
11/89	267.51
10/89	273.12
09/89	307.42
08/89	300.09
07/89	319.28
06/89	285.74
05/89	275.41
04/89	272.23
03/89	296.57
02/89	304.60
01/89	300.84

Average for 1988: 327.17 million gallons per day
12/88	267.26
11/88	267.51
10/88	273.12
09/88	307.42
08/88	300.09
07/88	319.28
06/88	285.74
05/88	275.41
04/88	272.23
03/88	296.57
02/88	304.60
01/88	300.84

Average for 1987: 337.73 million gallons per day
12/87	312.95
11/87	318.47
10/87	324.57
09/87	347.21
08/87	382.89
07/87	405.81
06/87	377.09
05/87	328.62
04/87	301.11
03/87	316.70
02/87	330.17
01/87	307.15

Average for 1986: 323.41 million gallons per day
12/86	296.78
11/86	316.99
10/86	330.53
09/86	352.75
08/86	342.80
07/86	356.99
06/86	336.69
05/86	324.38
04/86	299.02
03/86	305.12
02/86	303.64
01/86	315.31

Average for 1985: 333.97 million gallons per day
12/85	299.31
11/85	306.91
10/85	328.20
09/85	326.16
08/85	357.01
07/85	365.78
06/85	348.19
05/85	350.52
04/85	335.04
03/85	318.94
02/85	346.85
01/85	324.74

Quabbin Reservoir Levels Archive

Below is an archive of data for Quabbin Reservoir levels since 2005.

Key: ft = feet, mg=million gallons

Date	Elevation (ft)	Volume (mg)	Capacity (%)
09/01/24	526.06	381,825	92.6
08/01/24	527.13	390,088	94.6
07/01/24	527.80	395,180	95.9
06/01/24	529.12	405,341	98.3
05/01/24	530.12	413,252	100.2
04/01/24	530.45	416,056	100.9
03/01/24	529.35	407,144	98.8
02/01/24	529.28	406,595	98.6
01/01/24	527.74	394,724	95.8

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/23	526.31	383,925	93.1
11/01/23	527.07	389,632	94.5
10/01/23	527.30	391,380	94.9
09/01/23	527.29	391,304	94.9
08/01/23	527.96	396,396	96.2
07/01/23	526.85	387,975	94.1
06/01/23	527.76	394,876	95.8
05/01/23	528.01	396,777	96.2
04/01/23	527.22	390,772	94.8
03/01/23	526.00	381,600	92.6
02/01/23	525.36	376,800	91.4
01/01/23	523.53	363,075	88.1

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/22	522.65	356,4755	86.5
11/01/22	522.99	359,025	87.1
10/01/22	523.88	365,700	88.7
09/01/22	524.82	372,750	90.4
08/01/22	526.57	385,875	93.6
07/01/22	528.09	397,393	96.4
06/01/22	529.42	407,693	98.9
05/01/22	530.03	412,493	100.1
04/01/22	529.57	408,869	99.2
03/01/22	528.72	402,244	97.6
02/01/22	527.47	392,672	95.3
01/01/22	527.46	392,596	95.2

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/21	527.05	389,480	94.5
11/01/21	526.96	388,800	94.3
10/01/21	527.19	390,544	94.7
09/01/21	527.47	392,672	95.3
08/01/21	528.10	397,470	96.4
07/01/21	526.85	387,975	94.1
06/01/21	527.63	393,888	95.5
05/01/21	526.91	388,425	94.2
04/01/21	526.47	385,125	93.4
03/01/21	526.25	383,475	93.0
02/01/21	525.74	379,650	92.1
01/01/21	524.96	373,800	90.7

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/20	523.86	365,550	88.7
11/01/20	524.08	367,200	89.1
10/01/20	524.68	371,700	90.2
09/01/20	526.06	382,050	92.7
08/01/20	527.44	392,444	95.2
07/01/20	528.33	399,241	96.8
06/01/20	529.69	409,810	99.4
05/01/20	529.71	409,966	99.4
04/01/20	528.37	399,549	96.9
03/01/20	527.45	392,520	95.2
02/01/20	526.54	385,650	93.5
01/01/20	525.76	379,800	92.1

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/19	524.33	369,075	89.5
11/01/19	524.60	371,100	90.0
10/01/19	524.91	373,425	90.6
09/01/19	526.25	383,475	93.0
08/01/19	527.61	393,736	95.5
07/01/19	528.72	402,244	97.6
06/01/19	529.90	411,456	99.8
05/01/19	530.70	418,200	101.4
04/01/19	529.80	410,672	99.6
03/01/19	530.10	413,043	100.2
02/01/19	530.28	414,608	100.6
01/01/19	530.27	414,523	100.6

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/18	530.02	412,409	100.00
11/01/18	528.12	397,624	96.5
10/01/18	527.70	394,420	95.7
09/01/18	527.08	389,708	94.5
08/01/18	526.40	384,600	93.3
07/01/18	527.03	389,328	94.4
06/01/18	527.72	394,572	95.7
05/01/18	527.63	393,584	95.5
04/01/18	526.17	382,875	92.9
03/01/18	525.13	375,075	91.0
02/01/18	523.37	361,875	87.8
01/01/18	521.77	349,875	84.9

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/17	521.97	351,375	85.2
11/01/17	521.90	350,850	85.1
10/01/17	521.52	348,000	84.4
09/01/17	522.50	355,725	86.2
08/01/17	523.53	363,075	88.1
07/01/17	524.23	368,325	89.3
06/01/17	523.56	363,300	88.1
05/01/17	522.21	353,175	85.7
04/01/17	520.25	338,550	82.91
03/01/17	519.66	334,218	81.1
02/01/17	519.01	329,473	79.9
01/01/17	518.57	326,261	79.1

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/16	518.71	327,283	79.4
11/01/16	519.37	332,101	80.6
10/01/16	520.47	340,178	82.5
09/01/16	521.89	350,775	85.1
08/01/16	523.17	361,500	87.7
07/01/16	524.63	371,325	90.1
06/01/16	525.92	381,000	92.4
05/01/16	526.13	382,575	92.8
04/01/16	525.55	378,225	91.7
03/01/16	524.54	370,650	89.9
02/01/16	523.48	362,700	88.0
01/01/16	523.65	363,975	88.3

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/15	523.59	363,525	88.2
11/01/15	524.14	367,650	89.2
10/01/15	525.17	375,375	91.1
09/01/15	525.97	381,375	92.5
08/01/15	527.06	389,556	94.5
07/01/15	527.60	393,660	95.5
06/01/15	527.71	394,496	95.7
05/01/15	528.32	399,164	96.8
04/01/15	527.30	391,380	94.9
03/01/15	527.55	393,280	95.4
02/01/15	527.13	390,088	94.6
01/01/15	526.42	384,750	93.3

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/14	525.05	374,475	90.8
11/01/14	525.27	376,125	91.2
10/01/14	525.39	377,025	91.5
09/01/14	526.54	385,875	93.6
08/01/14	527.62	393,812	95.5
07/01/14	528.24	398,548	96.7
06/01/14	529.19	405,890	98.5
05/01/14	528.44	400,088	97.1
04/01/14	526.22	383,250	93.0
03/01/14	525.01	374,175	90.8
02/01/14	524.54	370,650	89.9
01/01/14	524.14	367,650	89.2

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/13	523.63	363,825	88.3
11/01/13	524.14	367,650	89.2
10/01/13	525.18	375,450	91.1
09/01/13	526.27	383,625	93.1
08/01/13	527.36	391,532	95.0
07/01/13	527.97	396,448	96.2
06/01/13	525.88	380,925	92.4
05/01/13	525.50	377,850	91.7
04/01/13	524.78	372,225	90.3
03/01/13	523.46	362,550	87.9
02/01/13	522.78	357,450	86.7
01/01/13	522.92	358,500	87.0

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/12	522.84	357,900	86.8
11/01/12	523.70	364,350	88.4
10/01/12	523.97	366,375	88.9
09/01/12	524.89	373,275	90.5
08/01/12	525.81	380,175	92.2
07/01/12	527.36	391,836	95.1
06/01/12	528.06	397,162	96.3
05/01/12	528.10	397,470	96.4
04/01/12	528.36	366,472	96.9
03/01/12	529.01	404,478	98.1
02/01/12	529.68	409,731	99.4
01/01/12	530.20	413,929	100.4

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/11	529.69	409,810	99.4
11/01/11	528.97	404,169	98.0
10/01/11	528.58	401,166	97.3
09/01/11	527.76	394,876	95.8
08/01/11	527.97	396,472	96.2
07/01/11	528.34	399,318	96.9
06/01/11	529.80	410,672	99.6
05/01/11	529.42	407,693	98.9
04/01/11	527.82	395,332	95.9
03/01/11	524.56	370,800	89.9
02/01/11	523.93	366,075	88.8
01/01/11	523.66	364,050	88.3
2011 AVERAGE	527.54 feet	393,369 mg	95.42%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/10	523.29	363,525	88.2
11/01/10	523.73	364,575	88.4
10/01/10	524.36	369,300	89.6
09/01/10	525.66	379,050	91.9
08/01/10	527.06	389,556	94.5
07/01/10	528.34	399,318	96.9
06/01/10	529.33	406,987	98.7
05/01/10	530.03	412,493	100.1
04/01/10	530.56	416,997	101.2
03/01/10	528.88	403,476	97.9
02/01/10	528.19	398,163	96.6
01/01/10	527.67	394,192	95.6
2010 AVERAGE	527.26 feet	391,469 mg	94.97%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/09	527.08	389,708	94.5
11/01/09	527.00	389,100	94.4
10/01/09	527.59	393,584	95.5
09/01/09	529.30	406,752	98.7
08/01/09	530.33	415,033	100.7
07/01/09	529.79	410,594	99.6
06/01/09	529.67	409,653	99.4
05/01/09	530.15	413,506	100.3
04/01/09	530.31	414,863	100.6
03/01/09	530.06	412,746	100.1
02/01/09	530.06	412,746	100.1
01/01/09	530.00	412,240	100
2009 AVERAGE	529.27 feet	406,710 mg	98.66 %

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/08	528.18	398,086	96.6
11/01/08	527.93	396,168	96.1
10/01/08	528.54	400,858	97.2
09/01/08	527.86	395,636	96.0
08/01/08	528.79	402,783	97.7
07/01/08	528.61	401,637	97.4
06/01/08	529.57	408,869	99.2
05/01/08	530.00	412.240	100
04/01/08	528.87	403,399	97.9
03/01/08	526.76	387,300	94.0
02/01/08	523.55	363,225	88.1
01/01/08	523.27	361,125	87.6
2008 AVERAGE	527.66 feet	359,958 mg	95.65 %

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/07	523.60	363,600	88.2
11/01/07	524.07	367,125	89.1
10/01/07	525.05	374,475	90.8
09/01/07	526.53	385,575	93.5
08/01/07	528.10	397,470	96.4
07/01/07	529.10	405,184	98.3
06/01/07	530.13	413.337	100.3
05/01/07	530.45	416,056	100.9
04/01/07	529.73	410,123	99.5
03/01/07	528.40	399,934	97.0
02/01/07	528.42	399,934	97.0
01/01/07	527.89	395,864	96.0
2007 AVERAGE	527.62 feet	359,646 mg	95.58 %

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/06	527.70	394,418	95.7
11/01/06	527.06	389,606	94.5
10/01/06	526.50	385,316	93.5
09/01/06	527.89	395,864	96.0
08/01/06	529.21	405,341	98.3
07/01/06	530.23	414,184	100.5
06/01/06	529.91	411,534	99.8
05/01/06	529.59	409,026	99.2
04/01/06	529.73	409,026	99.2
03/01/06	529.73	409,026	99.2
02/01/06	530.17	416,227	101.03
01/01/06	530.17	413,675	100.3
2006 AVERAGE	528.99 feet	404,437 mg	98.10 %

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/05	529.47	408,085	99.0
11/01/05	528.64	401,628	97.4
10/01/05	525.39	377,025	91.5
09/01/05	525.27	376,125	91.2
08/01/05	527.77	394,952	95.8
07/01/05	529.78	528,400	97.0
06/01/05	529.77	410,437	99.6
05/01/05	530.32	414,948	100.7
04/01/05	528.72	402,244	97.6
03/01/05	527.40	392,140	95.1
02/01/05	526.46	385,050	93.4
01/01/05	525.05	374,475	90.8
2005 AVERAGE	527.83 feet	394,283 mg	95.75 %

Wachusett Reservoir Levels Archive

Below is an archive of data for Wachusett Reservoir levels since 2005.

MWRA and the Mass. Department of Conservation and Recreation keep a daily watch on reservoir levels at Quabbin (412 billion gallon capacity) and Wachusett (65 billion gallons).

Wachusett levels are kept relatively fixed while Quabbin levels fluctuate with precipitation and watershed runoff.

Key: ft = feet, mg=million gallons

Date	Elevation (ft)	Volume (mg)	Capacity (%)
09/01/24	390.42	59,714	90.9
08/01/24	390.26	59,508	90.6
07/01/24	390.55	59,882	91.1
06/01/24	390.95	60,398	91.9
05/01/24	390.11	59,315	90.3
04/01/24	391.13	60,631	92.3
03/01/24	389.45	58,469	89.0
02/01/24	390.91	60,347	91.9
01/01/24	391.01	60,476	92.0

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/23	390.82	60,1230	91.7
11/01/23	390.78	60,179	91.6
10/01/23	391.65	61,305	93.3
09/01/23	390.75	60,140	91.5
08/01/23	392.05	61,825	94.1
07/01/23	390.63	59,985	91.3
06/01/23	390.55	59,882	91.1
05/01/23	389.66	58,738	89.4
04/01/23	390.38	59,663	90.8
03/01/23	389.43	58,443	89.0
02/01/23	391.69	61,357	93.4
01/01/23	390.41	59,701	90.9

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/22	389.59	58,648	89.5
11/01/22	389.71	58,802	89.5
10/01/22	389.55	58,597	89.2
09/01/22	389.82	58,943	89.7
08/01/22	389.39	58,392	88.9
07/01/22	389.39	58,392	88.9
06/01/22	388.95	57,830	88.0
05/01/22	389.36	58,354	88.8
04/01/22	390.42	59,714	90.9
03/01/22	391.57	61,201	93.2
02/01/22	390.25	59,495	90.6
01/01/22	390.56	59,598	91.2

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/21	390.33	59,598	90.7
11/01/21	391.29	60,838	92.6
10/01/21	390.69	60,063	91.4
09/01/21	390.43	59,727	90.9
08/01/21	390.53	59,856	91.1
07/01/21	390.66	60,024	91.4
06/01/21	391.53	61,149	93.1
05/01/21	391.49	60,217	91.7
04/01/21	389.49	58,520	89.1
03/01/21	388.21	56,892	86.6
02/01/21	390.36	59,637	90.8
01/01/21	391.81	61,513	93.6

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/20	390.59	59,993	91.2
11/01/20	390.64	59,998	91.3
10/01/20	390.49	59,805	91.0
09/01/20	390.53	59,856	91.1
08/01/20	390.37	59,650	90.8
07/01/20	390.78	60,179	91.6
06/01/20	390.20	59,431	90.5
05/01/20	391.26	60,799	92.5
04/01/20	391.31	60,864	92.6
03/01/20	390.69	60,063	91.4
02/01/20	390.55	59,882	91.1
01/01/20	391.36	60,929	92.7

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/19	390.96	60,411	92.0
11/01/19	390.87	60,295	91.8
10/01/19	390.42	59,714	90.9
09/01/19	390.41	59,701	90.9
08/01/19	390.43	59,727	90.9
07/01/19	390.72	60,101	91.5
06/01/19	390.42	59,714	90.9
05/01/19	392.26	62,099	94.5
04/01/19	391.14	60,644	92.3
03/01/19	390.64	59,998	91.3
02/01/19	391.68	61,344	93.4
01/01/19	391.85	61,565	93.7

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/18	394.64	65,223	99.3
11/01/18	390.95	60,398	91.9
10/01/18	391.40	61,000	92.9
09/01/18	390.70	60,075	91.4
08/01/18	390.61	59,959	91.3
07/01/18	390.81	60,217	91.7
06/01/18	390.49	59,805	91.0
05/01/18	390.96	60,463	92.0
04/01/18	390.60	59,946	91.2
03/01/18	390.54	59,869	91.1
02/01/18	389.78	58,892	89.6
01/01/18	391.13	60,631	92.3

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/17	390.59	59,933	91.2
11/01/17	391.72	61,396	93.4
10/01/17	390.43	59,727	90.9
09/01/17	390.33	59,548	90.7
08/01/17	390.53	59,856	91.1
07/01/17	390.95	60,398	91.9
06/01/17	392.45	62,646	94.9
05/01/17	393.20	63,327	96.4
04/01/17	392.00	61,760	94.4
03/01/17	390.43	59,727	90.9
02/01/17	390.63	59,985	91.3
01/01/17	390.56	59,895	91.2

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/16	390.96	60,411	91.9
11/01/16	390.55	59,882	91.1
10/01/16	390.63	59,985	91.3
09/01/16	390.50	59,817	91.0
08/01/16	390.52	59,843	91.1
07/01/16	390.32	59,586	90.7
06/01/16	389.53	58,571	89.1
05/01/16	389.94	59,097	89.9
04/01/16	390.68	60,050	91.4
03/01/16	390.92	60,360	91.9
02/01/16	391.35	60,916	92.7
01/01/16	390.78	60,179	91.6

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/15	390.34	59,611	90.7
11/01/15	390.43	59,727	90.9
10/01/15	390.33	59,598	90.7
09/01/15	390.51	59,830	91.1
08/01/15	390.49	59,805	91.0
07/01/15	390.73	60,114	91.5
06/01/15	390.62	59,972	91.3
05/01/15	390.15	59,367	90.4
04/01/15	387.48	55,975	85.2
03/01/15	387.13	55,538	84.5
02/01/15	389.56	58,610	89.2
01/01/15	390.31	59,573	90.7

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/14	390.24	59,483	90.5
11/01/14	390.43	59,727	90.9
10/01/14	390.60	59,946	91.2
09/01/14	390.45	59,753	90.9
08/01/14	390.45	59,753	90.9
07/01/14	390.42	59,714	90.9
06/01/14	390.55	59,882	91.1
05/01/14	390.78	60,179	91.6
04/01/14	390.31	59,573	90.7
03/01/14	388.62	57,411	87.4
02/01/14	390.02	59,200	90.1
01/01/14	390.63	59,985	91.3

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/13	390.62	59,972	91.3
11/01/13	390.49	59,805	91.0
10/01/13	390.33	59,598	90.7
09/01/13	390.33	59,598	90.7
08/01/13	390.65	60,011	91.3
07/01/13	390.53	59,856	91.1
06/01/13	391.62	61,266	93.3
05/01/13	390.24	59,483	90.5
04/01/13	389.70	58,789	89.5
03/01/13	390.15	59,367	90.4
02/01/13	391.36	60,929	92.7
01/01/13	390.42	59,714	90.9

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/12	390.64	59,998	91.3
11/01/12	390.00	59,174	90.1
10/01/12	390.81	60,217	91.7
09/01/12	390.17	59,393	90.4
08/01/12	390.45	59,753	90.9
07/01/12	390.42	59,714	90.9
06/01/12	390.42	59,714	90.9
05/01/12	390.63	59,985	91.3
04/01/12	390.62	59,972	91.3
03/01/12	390.64	59,998	91.3
02/01/12	390.93	60,372	91.9
01/01/12	390.50	59,817	91.0

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/11	390.50	59,817	91.0
11/01/11	390.50	59,817	91.0
10/01/11	390.51	59,830	91.1
09/01/11	390.04	59,225	90.1
08/01/11	388.24	56,930	86.7
07/01/11	390.03	59,213	90.1
06/01/11	389.84	58,969	89.8
05/01/11	390.70	60,075	91.4
04/01/11	390.52	59,843	91.1
03/01/11	387.37	55,837	85.0
02/01/11	389.06	57,971	88.2
01/01/11	390.74	60,127	91.5
2011 AVERAGE	389.83 ft	58,971mg	89.75%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/10	390.48	59,792	91.0
11/01/10	390.50	59,817	91.0
10/01/10	390.12	59,328	90.3
09/01/10	390.21	59,444	90.5
08/01/10	390.23	59,470	90.5
07/01/10	390.03	59,213	90.1
06/01/10	390.02	59,200	90.1
05/01/10	390.30	59,560	90.7
04/01/10	396.05	67,099	102.1
03/01/10	392.95	63,000	95.9
02/01/10	391.26	60,799	92.5
01/01/10	390.96	59,611	91.8
2010 AVERAGE	391.09 ft	60,528 mg	92.21%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/09	389.92	58,261	89.7
11/01/09	390.55	59,077	90.9
10/01/09	390.50	59,012	90.8
09/01/09	390.78	59,376	91.4
08/01/09	392.57	61,726	95.0
07/01/09	390.35	58,818	90.5
06/01/09	390.07	58,455	90.0
05/01/09	390.79	59,389	91.4
04/01/09	390.01	58,378	89.9
03/01/09	388.67	56,659	87.2
02/01/09	391.29	60,042	92.4
01/01/09	393.89	63,479	97.7
2009 AVERAGE	390.78 ft	59,389 mg	91.4%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/08	390.99	59,650	91.8
11/01/08	390.41	58,895	90.7
10/01/08	389.69	57,965	89.2
09/01/08	390.84	59,455	91.5
08/01/08	391.15	59,859	92.1
07/01/08	391.81	60,724	93.5
06/01/08	389.38	57,567	88.6
05/01/08	390.15	58,559	90.1
04/01/08	393.73	63,265	97.6
03/01/08	392.41	61,514	94.7
02/01/08	389.36	57,541	88.6
01/01/08	388.89	56,939	87.6
2008 AVERAGE	390.73 feet	59,328 mg	91.3%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/07	388.37	56,276	86.6
11/01/07	388.98	57,054	87.8
10/01/07	388.33	56,225	86.5
09/01/07	387.85	55,615	85.6
08/01/07	388.02	55,831	85.9
07/01/07	388.11	55,946	86.1
06/01/07	388.21	56,073	86.3
05/01/07	392.22	61,264	94.3
04/01/07	391.97	60,935	93.8
03/01/07	390.25	58,688	90.3
02/01/07	391.15	59,859	92.1
01/01/07	391.20	59,925	92.2
2007 AVERAGE	389.55 feet	57,808 mg	88.95%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/06	392.12	61,132	94.1
11/01/06	391.49	60,304	92.8
10/01/06	390.10	58,494	90.0
09/01/06	390.87	59,494	91.6
08/01/06	390.29	58,740	90.4
07/01/06	391.26	60,003	92.4
06/01/06	391.37	60,147	92.6
05/01/06	388.39	56,302	86.7
04/01/06	390.55	59,077	90.9
03/01/06	392.79	62,017	95.5
02/01/06	394.43	64,201	98.8
01/01/06	394.50	64,295	99.0
2006 AVERAGE	391.51 feet	60,651 mg	92.9%

Date	Elevation (ft)	Volume (mg)	Capacity (%)
12/01/05	394.32	64,054	98.6
11/01/05	393.55	63,026	97.0
10/01/05	390.50	59,012	90.8
09/01/05	391.32	60,082	92.5
08/01/05	391.89	59,912	92.2
07/01/05	390.13	58,533	90.1
06/01/05	391.89	60,829	93.6
05/01/05	394.36	64,108	98.7
04/01/05	391.34	59,038	92.5
03/01/05	390.52	59,038	90.9
02/01/05	391.39	60,173	92.6
01/01/05	391.05	59,729	91.9
2005 AVERAGE	391.855 feet	60,627 mg	93.45%

Precipitation Levels Archive

Below is an archive of precipitation levels at the Quabbin and Wachusett watersheds since 2006.

Monthly total - in inches

Month	Quabbin watershed	Wachusett watershed
12/23	6.12	7.34
11/23	1.85	1.62
10/23	3.65	3.00
09/23	9.06	8.08
08/23	4.60	5.55
07/23	10.65	11.31
06/23	4.72	3.75
05/23	2.77	2.21
04/23	3.23	4.28
03/23	4.14	4.49
02/23	1.62	1.70
01/23	6.01	5.54
TOTAL 2023	58.42 inches	58.87 inches

Month	Quabbin watershed	Wachusett watershed
12/22	4.62	5.83
11/22	3.32	2.44
10/22	3.72	5.38
09/22	6.87	6.13
08/22	3.50	1.31
07/22	3.94	1.85
06/22	2.87	2.24
05/22	3.39	1.84
04/22	3.95	3.28
03/22	3.56	3.04
02/22	4.61	4.07
01/22	2.24	2.51
TOTAL 2022	46.59 inches	39.92 inches

Month	Quabbin watershed	Wachusett watershed
12/21	03.58	02.68
11/21	02.34	01.43
10/21	05.63	07.19
09/21	05.90	07.68
08/21	04.15	04.54
07/21	11.13	11.02
06/21	01.77	02.15
05/21	05.46	06.19
04/21	04.35	04.04
03/21	02.50	01.80
02/21	02.37	02.99
01/21	02.47	02.62
TOTAL 2021	51.65 inches	54.33 inches

Month	Quabbin watershed	Wachusett watershed
12/20	05.42	05.01
11/20	04.29	05.20
10/20	06.08	04.95
09/20	02.63	01.85
08/20	04.03	02.36
07/20	03.19	03.73
06/20	02.62	02.56
05/20	01.93	02.05
04/20	05.23	06.15
03/20	03.76	03.89
02/20	03.11	03.30
01/20	01.63	01.87
TOTAL 2020	39.63 inches	37.72 inches

Month	Quabbin watershed	Wachusett watershed
12/19	00.24	00.22
11/19	03.24	02.25
10/19	06.79	07.22
09/19	01.78	01.58
08/19	05.76	03.11
07/19	04.88	05.35
06/19	03.15	03.40
05/19	03.90	03.03
04/19	08.79	06.51
03/19	02.78	02.91
02/19	03.25	03.77
01/19	06.35	04.13
TOTAL 2019	50.91 inches	43.48 inches

Month	Quabbin watershed	Wachusett watershed
12/18	04.69	03.94
11/18	08.16	11.09
10/18	03.97	04.57
09/18	08.65	07.24
08/18	06.20	06.69
07/18	05.82	03.63
06/18	05.44	02.02
05/18	02.02	02.06
04/18	04.94	04.94
03/18	02.42	02.42
02/18	05.24	05.24
01/18	01.96	01.96
TOTAL 2018	59.51 inches	55.80 inches

Month	Quabbin watershed	Wachusett watershed
12/17	01.96	02.70
11/17	01.46	01.33
10/17	09.77	08.89
09/17	02.86	02.89
08/17	02.56	01.94
07/17	02.73	01.96
06/17	03.58	04.21
05/17	04.80	05.06
04/17	03.73	05.31
03/17	04.33	04.12
02/17	02.09	03.59
01/17	02.31	03.63
TOTAL 2017	42.18 inches	45.63 inches

Month	Quabbin watershed	Wachusett watershed
12/16	02.42	03.37
11/16	03.19	03.42
10/16	02.25	06.47
09/16	02.09	01.67
08/16	04.72	03.12
07/16	02.63	00.83
06/16	02.17	01.60
05/16	02.43	02.04
04/16	02.14	02.74
03/16	03.38	03.52
02/16	04.67	03.91
01/16	01.98	01.98
TOTAL 2016	34.07 inches	34.67 inches

Month	Quabbin watershed	Wachusett watershed
12/15	05.29	04.74
11/15	01.63	01.69
10/15	02.28	02.25
09/15	05.50	03.95
08/15	02.59	02.00
07/15	04.07	03.71
06/15	07.23	06.54
05/15	00.90	00.35
04/15	02.58	02.54
03/15	02.81	01.99
02/15	02.85	02.09
01/15	04.03	03.25
TOTAL 2015	41.76 inches	35.10 inches

Month	Quabbin watershed	Wachusett watershed
12/14	05.37	05.05
11/14	03.38	04.07
10/14	05.68	05.43
09/14	00.86	01.10
08/14	03.84	03.60
07/14	05.81	04.93
06/14	01.74	02.27
05/14	03.82	03.76
04/14	05.48	03.65
03/14	05.54	05.91
02/14	03.87	03.61
01/14	03.72	02.51
TOTAL 2014	49.11 inches	45.89 inches

Month	Quabbin watershed	Wachusett watershed
12/13	03.79	03.36
11/13	03.16	02.68
10/13	02.39	01.10
09/13	04.13	02.49
08/13	05.48	01.87
07/13	05.61	02.16
06/13	08.16	09.02
05/13	06.04	04.02
04/13	01.88	01.76
03/13	02.04	03.00
02/13	02.62	05.52
01/13	01.99	01.26
TOTAL 2013	47.29 inches	38.24 inches

Month	Quabbin watershed	Wachusett watershed
12/12	03.56	03.64
11/12	00.45	00.60
10/12	03.49	05.05
09/12	06.76	04.80
08/12	04.98	06.70
07/12	02.66	03.16
06/12	03.78	05.36
05/12	04.11	04.00
04/12	01.95	03.12
03/12	00.50	01.66
02/12	01.68	01.41
01/12	02.27	03.03
TOTAL 2012	32.63 inches	38.89 inches

Month	Quabbin watershed	Wachusett watershed
12/11	04.45	05.16
11/11	03.90	04.30
10/11	07.49	05.97
09/11	08.15	05.62
08/11	11.33	12.20
07/11	02.46	02.20
06/11	03.51	03.92
05/11	05.15	02.63
04/11	04.72	04.38
03/11	03.92	02.78
02/11	04.56	04.84
01/11	03.00	04.09
TOTAL 2011	62.64 inches	58.09 inches

Month	Quabbin watershed	Wachusett watershed
12/10	02.45	03.87
11/10	03.18	03.55
10/10	05.78	04.41
09/10	01.92	01.36
08/10	04.30	02.01
07/10	03.58	02.55
06/10	03.51	03.92
05/10	02.83	02.51
04/10	00.98	00.95
03/10	06.11	10.98
02/10	03.68	04.26
01/10	02.49	02.52
TOTAL 2010	40.81 inches	42.89 inches

Month	Quabbin watershed	Wachusett watershed
12/09	03.44	04.15
11/09	02.47	02.94
10/09	05.73	03.81
09/09	00.98	01.16
08/09	00.99	02.87
07/09	11.46	08.50
06/09	05.60	03.97
05/09	04.38	02.96
04/09	03.26	03.80
03/09	01.91	01.38
02/09	01.91	01.38
01/09	03.62	03.43
TOTAL 2009	44.75 inches	40.35 inches

Month	Quabbin watershed	Wachusett watershed
12/08	07.01	04.47
11/08	03.70	03.70
10/08	02.65	01.61
09/08	10.01	06.47
08/08	04.34	04.04
07/08	09.85	05.41
06/08	05.02	02.91
05/08	01.23	01.75
04/08	04.24	03.21
03/08	04.90	02.32
02/08	10.33	03.52
01/08	00.06	00.05
TOTAL 2008	63.64 inches	39.46 inches

Month	Quabbin watershed	Wachusett watershed
12/07	03.21	03.78
11/07	00.11	00.05
10/07	00.10	00.11
09/07	02.09	00.75
08/07	01.99	00.48
07/07	04.62	01.10
06/07	03.01	00.99
05/07	02.78	02.68
04/07	05.11	03.42
03/07	04.93	02.23
02/07	01.76	01.73
01/07	03.68	01.37
TOTAL 2007	33.39 inches	17.28 inches

Month	Quabbin watershed	Wachusett watershed
12/06	02.12	00.80
11/06	03.99	02.47
10/06	05.52	04.25
09/06	02.49	02.78
08/06	04.66	04.07
07/06	02.62	02.87
06/06	07.13	06.81
05/06	05.41	06.64
04/06	02.07	02.44
03/06	00.66	00.50
02/06	02.74	03.48
01/06	04.69	05.16
TOTAL 2006	51.25 inches	42.27 inches

Month	Quabbin watershed	Wachusett watershed
08/24	3.73	3.55
07/24	5.70	2.31
06/24	2.90	2.55
05/24	4.48	4.90
04/24	3.75	4.70
03/24	8.29	7.83
02/24	1.72	0.71
01/24	5.64	6.08
TOTAL 2024	32.48 inches	29.08 inches

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