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National Drinking Water Database


Chromium (total) in Washington


Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits. [read more]

The Most Polluted Communities in Washington

30 water utilities reported detecting Chromium (total) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Chromium (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Mineral Heights Association
Friday Harbor, WA
421 of 137 ppb
(37 ppb)
2Erland Point Water Co
Silverdale, WA
1,5701 of 116 ppb
(16 ppb)
3Stevens Co Pud - Chatteroy Springs North
Chattaroy, WA
371 of 211.25 ppb
(0 to 22.5 ppb)
4Eastlake Water Association
Oroville, WA
381 of 111 ppb
(11 ppb)
5Mutiny Bay Park Inc
Clinton, WA
761 of 110 ppb
(10 ppb)
6Skookum Ranch
Gig Harbor, WA
531 of 110 ppb
(10 ppb)
7Wanapum Indian Village
Beverly, WA
501 of 18.5 ppb
(8.5 ppb)
8Martin Way Mobile Home Park
Tumwater, WA
811 of 18 ppb
(8 ppb)
9Heathrow Water System
Oak Harbor, WA
541 of 17 ppb
(7 ppb)
10Lagoon Point Water District
Greenbank, WA
4951 of 15 ppb
(5 ppb)

Health Based Limits for Chromium (total)

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.100 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.100 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.100 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.1000 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.1000 ppb

Violation Summary for Chromium (total) in Washington

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

Violation TypeNumber of Violations
Failure to monitor regularly210