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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Gross beta particle activity (mrem/yr)


Status: Regulated - EPA has established a maximum legal limit in tapwater for this contaminant.

Beta particles are a form of radiation frequently associated with nuclear testing and radioactive mineral deposits. [read more]

 
Detected
Found above
health guidelines
Found above
legal limit
States
2
2
1
Water utilities
3
3
1
People Served
317,287
317,287
50,004

Gross beta particle activity (mrem/yr) Exposure by State

Water utilities in 2 states have reported detecting Gross beta particle activity (mrem/yr) in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Gross beta particle activity (mrem/yr) contaminationWater suppliers reporting Gross beta particle activity (mrem/yr) above health-based limits
SystemsPopulationSystemsPopulation
Delaware1201,0001201,000
Florida2116,2872116,287
Total3317,2873317,287

The Most Polluted Communities

3 water utilities reported detecting Gross beta particle activity (mrem/yr) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Gross beta particle activity (mrem/yr) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Wellington Wtp
Wellington, FL
50,0041 of 19 mrem/yr
(9 mrem/yr)
2Artesian Water Company
Newark, DE
201,0002 of 22.6 mrem/yr
(2.24 to 2.95 mrem/yr)
3Winter Garden Water Dept (3 Wps)
Winter Garden, FL
66,2833 of 31.68 mrem/yr
(0.83 to 2.5 mrem/yr)

Health Based Limits for Gross beta particle activity (mrem/yr)

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 mrem/yr
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.0.04 mrem/yr
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.4 mrem/yr
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.4 mrem/yr

Testing Summary for Gross beta particle activity (mrem/yr)

Are tests routinely required for Gross beta particle activity (mrem/yr) by federal law?Yes
Water suppliers reporting tests for Gross beta particle activity (mrem/yr) (2004-2008):177 of 47,576
Average testing rate for water supplier reporting tests (2004-2008):0.4 per year

Violation Summary for Gross beta particle activity (mrem/yr)

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards for Gross beta particle activity (mrem/yr) since 2004

Maximum Contaminant Level Exceedance Violations1
Monitoring Violations68
Reporting Violations0