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National Drinking Water Database


Silver (total) in Washington


Silver is an element from natural deposits and mining wastes; it is also associated with the development of photographic and x-ray film and the use of silver in antibacterial consumer products.

The Most Polluted Communities in Washington

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

Ranked by highest average Silver (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Pleasant Valley - 307
Wa, WA
501 of 120 ppb
(20 ppb)
2North Slope Estates Property
Eltopia, WA
971 of 114 ppb
(14 ppb)
3Silvana Water Association
Silvana, WA
1501 of 110 ppb
(10 ppb)
4Metz Water Association
Spokane, WA
2501 of 17 ppb
(7 ppb)
5BC Water Co
Kennewick, WA
1551 of 16 ppb
(6 ppb)
6Firgrove Mutual Inc
Puyallup, WA
25,4921 of 33.33 ppb
(0 to 10 ppb)
7Canyon Village Water System Inc
Kennewick, WA
2901 of 13 ppb
(3 ppb)
8City of Shelton
Shelton, WA
8,4221 of 11 ppb
(1 ppb)
9Perch Point Resort
Moses Lake, WA
461 of 11 ppb
(1 ppb)
10Sun Harbor Water District #3
Burbank, WA
1871 of 11 ppb
(1 ppb)

Health Based Limits for Silver (total)

StandardDescriptionLevel
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.100 ppb
National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. Source: U.S. Environmental Protection Agency. 100 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.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.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.200 ppb

Violation Summary for Silver (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