MWRA online - home

UCMR
(Unregulated Contaminant Monitoring Rule
) Data

Massachusetts Water Resources Authority

Cryptosporidium and Giardia

MWRA has been testing for Cryptosporidium and Giardia since 1994.

Research for New Regulations

The US Environmental Protection Agency (EPA) periodically requires water systems across the country to conduct monitoring for substances that may be present in drinking water to help understand their national occurrence as part of the process of deciding whether to regulate them.  Under the Safe Drinking Water Act Amendments, EPA established the Unregulated Monitoring Rule and is required once every five years to develop a list of up to 30 new contaminants that must be monitored by public water systems that meet the criteria for sampling.  This monitoring is used by EPA to understand the frequency and level of occurrence of unregulated contaminants in the nation’s public water systems (PWSs).

UCMR 4 (2018-2020)

In December 2016, EPA issued a final rule establishing the fourth round of the Unregulated Contaminant Monitoring Rule (UCMR4).  UCMR 4 requires monitoring for 30 chemicals between 2018 and 2020. MWRA started to collect samples for 20 of the contaminants during 2018 at community locations which are fully supplied by MWRA.  Cyanotoxin monitoring includes an additional 10 contaminants and will primarily take place in 2020.  Even with the extremely sensitive test methods used at EPA-approved laboratories, capable of detecting some substances at parts per trillion levels – which is 1000 times more sensitive than parts per billion, we expected to find very few of the substances that we were required to test for due to MWRA’s highly protected watershed and reservoirs. Only 4 of the 20 tested for in 2018 were detected, and all were at extremely low levels.  The results for those are reported below. Here is a list of the UCMR 4 contaminants:

Contaminants (20)
germanium 

total permethrin (cis- & trans-) 

tebuconazole

butylated hydroxyanisole

oxyfluorfen

profenofos

2-methoxyethanol

ethoprop

manganese

1-butanol

dimethipin

o-toluidine

HAA5

chlorpyrifos

HAA6Br

tribufos

HAA9   

2-propen-1-ol

alpha-hexachlorocyclohexane

quinoline

 

Cyanotoxins (10)

total microcystins

anatoxin-a

microcystin-YR

microcystin-RR

cylindrospermopsin

microcystin-LY

microcystin-LA

microcystin-LF

microcystin-LR

nodularin

 

MWRA UCMR 4 Test Results 2018

Fully Supplied Communities

Chicopee Valley Aqueduct
(CVA) Communities

Partially Supplied Communities

2018

--

--

UCMR 3 (2013-2015)

MWRA collected samples during 2013, 2014, and 2015 at locations throughout our service area for 21 substances and for 7 hormones. Even with the extremely sensitive test methods used capable of detecting some substances including 7 PFAS compounds at parts per trillion levels, we expected to find very few of the substances that we were required to test for due to MWRA’s highly protected watershed and reservoirs. Only 5 of the 21 substances tested for in 2013, 2014, and 2015 were detected, and all were at extremely low levels. None of the seven hormones tested for in 2014 and 2015 were detected.

Here is the complete list of 21 substances plus 7 hormones:

Contaminants (21)

1,2,3-trichloropropane 

cobalt

bromomethane 

strontium

chloromethane

total chromium

bromochloromethane

hexavalent chromium

chlorodifluoromethane

chlorate

1,3-butadiene

perfluorooctanesulfonic acid

1,1-dichloroethane

perfluorooctanoic acid

1,4-dioxane

perfluorobutanesulfonic acid

vanadium

perfluorohexanesulfonic acid

molybdenum

perfluoroheptanoic acid

perfluorononanoic acid

 

Hormones (7)

17-a-Ethynylestradiol

17-b-Estradiol

Estrone

4-androstene-3,17-dione

Estriol

Equilin

Testosterone


More information on these substances and UCMR3 can be found at at on the US EPA web site.

MWRA UCMR 3 Test Results 2013-2015*

Fully Supplied Communities

Chicopee Valley Aqueduct
(CVA) Communities

Partially Supplied Communities

2015

2015

2015

2014

--

2014

2013

--

--

* UCMR 3 (2013-2015) monitoring is complete. UCMR 4 (2018-2020) monitoring is underway.


How will this data be used?

EPA will collect and analyze data for all three years and from systems all across the country to develop an understanding of the occurrence, level and distribution of these substances in drinking water.  That data, along with information on potential health effects and water treatment effectiveness will be used by EPA to determine if any new regulations are needed. 

 

Follow us

twitter icon
flickr
YouTube button
Sign Up for Everbridge Notifications from MWRA

Back to top

Updated August 23, 2019

PDF files on this site require Adobe Acrobat Reader (free download)