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National Drinking Water Database


Beryllium (total) in California


Beryllium is a metal associated with metal refineries and combustion of fossil fuels, especially coal burning; it is released into the environment from electrical, aerospace and defense industries. [read more]

The Most Polluted Communities in California

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

Ranked by highest average Beryllium (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Sierra City Water Works, Inc.
Sierra City, CA
601 of 17.5 ppb
(7.5 ppb)
2Tamarron Mobile Home Park
Sonora, CA
2731 of 23 ppb
(0 to 6 ppb)
3Woodridge Mutual Water Co
Shingletown, CA
2101 of 20.93 ppb
(0 to 1.85 ppb)
4Ccwd Ebbetts Pass Improvement District
San Andreas, CA
14,3401 of 40.63 ppb
(0 to 2.5 ppb)
5Champion Water Mutual
El Monte, CA
2501 of 40.25 ppb
(0 to 1 ppb)
6City of Rohnert Park
Rohnert Park, CA
42,6501 of 90.22 ppb
(0 to 2 ppb)
7Valley Water Co.
La Canada Flintrige, CA
9,4772 of 50.2 ppb
(0 to 0.75 ppb)
8Gswc-South Arcadia
San Dimas, CA
24,0211 of 60.08 ppb
(0 to 0.5 ppb)
9Suburban Water Systems-San Jose
Covina, CA
110,6021 of 130.08 ppb
(0 to 1 ppb)
10Paradise Ranch Mhp C/O Santiago Assoc.
Castaic, CA
2042 of 50.08 ppb
(0 to 0.25 ppb)

Health Based Limits for Beryllium (total)

StandardDescriptionLevel
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.1 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.4 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.4 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.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.30000 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.30000 ppb

Violation Summary for Beryllium (total) in California

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

Violation TypeNumber of Violations
Failure to monitor regularly9