The Power of Information

National Drinking Water Database


Total haloacetic acids (HAAs) in Massachusetts


Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid. [read more]

The Most Polluted Communities in Massachusetts

232 water utilities reported detecting Total haloacetic acids (HAAs) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Total haloacetic acids (HAAs) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Holyoke Water Works
Holyoke, MA
39,83826 of 2646.65 ppb
(27.2 to 69.95 ppb)
2Northampton Water Dept
Northampton, MA
30,38421 of 2145.96 ppb
(1.38 to 91.75 ppb)
3Clinton Water Dept
Clinton, MA
13,00024 of 2445.41 ppb
(18.1 to 88.3 ppb)
4Fitchburg Dpw, Water Division
Fitchburg, MA
39,00031 of 3140.19 ppb
(4.9 to 59.33 ppb)
5Northboro Water Department
Northborough, MA
10,90010 of 1038.74 ppb
(6.9 to 59 ppb)
6Springfield Water & Sewer Commission
Springfield, MA
250,00025 of 2538.38 ppb
(17.48 to 86.17 ppb)
7Blandford Water Dept
Blandford, MA
87420 of 2037.8 ppb
(0.8 to 93 ppb)
8Southborough Dpw : Water Division
Southborough, MA
8,5007 of 737.3 ppb
(23.35 to 61.05 ppb)
9Westminster Department of Public Works
Westminster, MA
4,81023 of 2336.87 ppb
(18.6 to 62.3 ppb)
10Amherst Dpw Water Division
Amherst, MA
35,27823 of 2336.59 ppb
(18.75 to 76.02 ppb)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.70 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.450 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb

Violation Summary for Total haloacetic acids (HAAs) in Massachusetts

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Massachusetts since 2004

Violation TypeNumber of Violations
Monitoring and Reporting Disinfection Byproduct Rule28
Over maximum contaminant level, Average4