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Potential Contaminants Tested for
in the MWRA Water System

Massachusetts Water Resources Authority

 

MORE INFORMATION
Annual Test Results
Monthly Test Results
What Need to Know about Lead in Tap Water
WATER TEST RESULTS
Annual Test Results
Monthly Test Results
CONTACT US
MWRA Water Quality Hotline 617-242-5323

Email: Joshua Das

The MWRA water system tests for all of the following contaminants. Per state and federal law, MWRA and your local water department have systems in place to let customers and authorities know if any contaminants were ever found in the water system. 

MWRA publishes monthly water quality test results and also sends an annual water quality report to every home and business it serves.

If any contaminants were found in your water, they would be listed in the annual water quality report.

Radioactive Contaminants

  • Beta/photon emitters particles
  • Combined radium
  • Gross Alpha Particle Activity
  • Radium-226
  • Radium-228
  • Radon-222

Inorganic Contaminants

  • Antimony
  • Arsenic
  • Asbestos
  • Barium
  • Beryllium
  • Cadmium
  • Chromium
  • Cyanide
  • Fluoride
  • Hexavalent Chromium
  • Lead
  • Mercury
  • Nickel
  • Nitrate
  • Nitrite
  • Selenium
  • Sodium
  • Sulfate
  • Thallium

Microbiological

  • Total Coliform
  • E. Coli
  • Giardia
  • Cryptosporidium
  • Viruses
  • Heterotrophic Bacteria Plate Count (HPC)

Chlorine and Chlorine By-Products

  • Bromate
  • Chlorine
  • Chloramine
  • Perchlorate
  • Trihalomethanes
  • Haloacetic Acids

Secondary Contaminants

  • Alkalinity - total (CaCO3)
  • Aluminum (Al)
  • Calcium (Ca)
  • Chloride
  • Color (Color Unit)
  •  Copper (Cu)
  • Hardness (CaCO3)
  • Iron (Fe)
  • Magnesium (Mg)
  • Manganese (Mn)
  • Odor (TON)
  • pH
  • Potassium (K)
  • Silver (Ag)
  • Sulfate (SO4)
  • TDS 
  • Turbidity (NTU)
  • Zinc (Zn)

Lead and Copper

  • Lead (Pb)
  • Copper (Cu)

Volatile Organic Contaminants -Regulated Contaminants

  • 1,1,1-Trichloroethane
  • 1,1,2-Trichloroethane
  • 1,1-Dichloroethylene
  • 1,2,4-Trichlorobenzene
  • 1,2-Dichloroethane
  • 1,2-Dichloropropane
  • Benzene
  • Carbon Tetrachloride
  • CIS-1,2-Dichloroethylene
  • Dichloromethane
  • Ethylbenzene
  • Monochlorobenzene
  • O-Dichlorobenzene
  • Styrene
  • Tetrachloroethylene
  • Toluene
  • Trans-1,2-Dichloroethylene
  • Trichloroethylene
  • Vinyl Chloride
  • Xylenes (Total)

Volatile Organic Contaminants – Unregulated Contaminants

  • 1,1,1,2-Tetrachloroethane
  • 1,1,2,2-Tetrachloroethane
  • 1,1-Dichloroethane
  • 1,1-Dichloropropene
  • 1,2,3-Trichlorobenzene
  • 1,2,3-Trichloropropane
  • 1,2,4-Trimethylbenzene
  • 1,3,5-Trimethylbenzene
  • 1,3-Dichloropropane
  • 1,3-Dichloropropene
  • 2,2- Dichloropropane
  • Bromobenzene
  • Bromochloromethane
  • Bromodichloromethane
  • Bromoform
  • Bromomethane
  • Chlorodibromomethane
  • Chloroethane
  • Chloroform
  • Chloromethane
  • Dibromomethane
  • Dichlorodifluoromethane
  • Fluorotrichloromethane
  • Hexachlorobutadiene
  • Isoprobylbenzene
  • M-Dichlorobenzene
  • Methyl Tertiary Butyl Ether
  • Naphthalene
  • N-Butylbenzene
  • N-Propylbenzene
  • O-Chlorotoluene
  • P- Chlorotoluene
  • P-Isopropyltoluene
  • Sec-Butylbenzene
  • Tert-Butylbenzene

Synthetic Organic Contaminants - Regulated Contaminants

  • 2,4,5-TP (Silvex)
  • 2,4-D
  • Alachlor
  • Atrazine
  • Benzo(a)pyrene
  • Carbofuran
  • Chlordane
  • Dalapon
  • Di(ethylhexyl)adipate
  • Di(ethylhexyl)phthalates
  • Dinoseb
  • Endrin
  • Heptachlor
  • Heptachlor Epoxide
  • Hexachlorobenzene
  • Hexachlorocyclopentadiene
  • Lindane
  • Methoxychlor
  • Oxamyl(vydate)
  • PCB Aroclor 1016
  • PCB Aroclor 1221
  • PCB Aroclor 1232
  • PCB Aroclor 1242
  • PCB Aroclor 1248
  • PCB Aroclor 1254
  • PCB Aroclor 1260
  • PCB'S (Decachlorobiphenyl)
  • Pentachlorophenol
  • Picloram
  • Simazine
  • Toxaphene

Synthetic Organic Contaminants- Waived Contaminants (waived for surface water supplies)

  • Dibromochloropropane (DBCP)
  • Ethylene Dibromide (EDB)

Synthetic Organic Contaminants -Unregulated Contaminants

  • 3-Hydroxycarbofuran
  • Aldicarb
  • Aldicarb Sulfone
  • Aldicarb Sulfoxide
  • Aldrin
  • Butachlor
  • Carbaryl
  • Dicamba
  • Dieldrin
  • Methomyl
  • Metolachlor
  • Metribuzin
  • Propachlor

Process Control

  • Alkalinity
  • Conductance
  • Free Chlorine
  • Total Chlorine
  • Monochloramine
  • Free Ammonia
  • Nitrate/Nitrite
  • Total Organic Carbon
  • UV-254
  • Fluoride

Disinfection By-Products - Unregulated Contaminants

  • Haloacetilenitriles
  • Haloketones
  • Chloropicrin
  • Chloral Hydrate
  • Total Organic Halides
  • Cyanogen Chloride
  • Chlorate

Unregulated Contaminant Monitoring Rule 1 Contaminants (List 1)

  • 2,4-dinitrotoluene
  • 2,6-dinitrotoluene
  • Acetochlor
  • DCPA mono-acid degradate
  • DCPA di-acid degradate
  • 4,4'-DDE
  • EPTC
  • Molinate
  • MTBE
  • Nitrobenzene
  • Terbacil

Unregulated Contaminant Monitoring Rule 1 Contaminants (List 2)

  • Aeromonas

Unregulated Contaminant Monitoring Rule 2 Contaminants
(Lists 1 and 2)

  • 1,3-dinitrobenzene
  • 245-HBB
  • Acetochlor ESA
  • Acetochlor OA
  • BDE-100
  • BDE-153
  • BDE-47
  • BDE-99
  • Dimethoate
  • Metolachlor ESA
  • Metolachlor OA
  • NDBA
  • NDEA
  • NDMA
  • NDPA
  • NMEA
  • NPYR
  • RDX
  • Terbufos Sulfone
  • TNT

Pharmaceuticals

  • Acetaminophen
  • Caffeine
  • Carbamazepine
  • Fluoxetine
  • Gemfibrozil
  • Ibuprofen
  • Iopromide
  • Sulfamethoxazole
  • Trimethoprim

Hormones

  • Estradiol
  • Estrone
  • Ethyl Estradiol
  • Progesterone
  • Testosterone

Endocrine Disrupters

  • 2, 6-Di-tert-butylphenol
  • 4-Methylphenol
  • 4-Nonylphenol
  • Alpha Chloradane
  • Bis Phenol A (BPA)
  • Carbaryl
  • Chlorpyrifos
  • DEET
  • Diazinon
  • Dieldrin
  • Methylparathon
  • Phenol
  • TDCPP
  • Triclosan
  • Triphenyl Phosphate
  • Tris (2-Butoxyethyl) Phosphate
  • Tris (2-Chloroethyl) Phosphate

Other

  • Aldehydes
  • Chloride
  • Bromide
  • Silica
  • Total Phosphorous

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Updated August 1, 2012