The Power of Information

National Drinking Water Database


Monochloroacetic acid in Washington


Monochloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in Washington

44 water utilities reported detecting Monochloroacetic acid in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Monochloroacetic acid level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Dugualla Community Inc
Oak Harbor, WA
4501 of 18.2 ppb
(8.2 ppb)
2Arrowhead Beach Coop Water Assoc
Mount Vernon, WA
1651 of 16.2 ppb
(6.2 ppb)
3Andrain Road Water Assn
Puyallup, WA
1891 of 12.9 ppb
(2.9 ppb)
4City of Ilwaco Water Department
Ilwaco, WA
8195 of 102.01 ppb
(0 to 5.4 ppb)
5North Bluff Association
Greenbank, WA
251 of 12 ppb
(2 ppb)
6Bayview Estates Water Company
Oak Harbor, WA
2271 of 12 ppb
(2 ppb)
7San Juan Ranchos
Friday Harbor, WA
281 of 91.53 ppb
(0 to 13.8 ppb)
8Willapa Valley Water District
Raymond, WA
2,0004 of 111.26 ppb
(0 to 4.7 ppb)
9Lisecc
Lummi Island, WA
1102 of 41.25 ppb
(0 to 3 ppb)
10Long Beach Water Department
Long Beach, WA
2,8654 of 91.24 ppb
(0 to 3.2 ppb)

Health Based Limits for Monochloroacetic acid

StandardDescriptionLevel
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
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. 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
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.200 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.200 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.350 ppb

Violation Summary for Monochloroacetic acid in Washington

There are no violations reported for this contaminant in Washington