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National Drinking Water Database


Bromate in Washington


Bromate is a carcinogenic disinfection byproduct of ozonation formed when source waters contain high levels of natural bromide; it can also form following water treatment with chlorine dioxide or hypochlorite. [read more]

The Most Polluted Communities in Washington

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

Ranked by highest average Bromate level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Lake Retreat Camp & Conf Center
Ravensdale, WA
253 of 82.5 ppb
(0 to 8 ppb)
2Sunlight Shores Country Club
Clinton, WA
1503 of 301.11 ppb
(0 to 22 ppb)
3Goss Lake Park Community
Freeland, WA
1505 of 330.76 ppb
(0 to 6 ppb)
4Lagoon Point Water District
Greenbank, WA
4953 of 320.75 ppb
(0 to 15 ppb)
5River Oaks RV Park & Campground
Toledo, WA
302 of 290.48 ppb
(0 to 10 ppb)
6Mutiny View Manor Community Club
Clinton, WA
1732 of 300.27 ppb
(0 to 5 ppb)
7Long Point Water Company Inc
Oak Harbor, WA
1821 of 340.24 ppb
(0 to 8 ppb)
8Shirona Water System
Oak Harbor, WA
2301 of 300.23 ppb
(0 to 7 ppb)
9Enterprise Estates Water Assoc.
Ferndale, WA
1842 of 350.23 ppb
(0 to 4 ppb)
10Sunvista/Sunlight Beach
Clinton, WA
3001 of 300.2 ppb
(0 to 6 ppb)

Health Based Limits for Bromate

StandardDescriptionLevel
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.0 ppb
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.0.05 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.5 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.10 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.140 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

Violation Summary for Bromate in Washington

There are no violations reported for this contaminant in Washington