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
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Pleasant Valley - 307 Wa, WA | 50 | 1 of 1 | 20 ppb (20 ppb) |
| 2 | North Slope Estates Property Eltopia, WA | 97 | 1 of 1 | 14 ppb (14 ppb) |
| 3 | Silvana Water Association Silvana, WA | 150 | 1 of 1 | 10 ppb (10 ppb) |
| 4 | Metz Water Association Spokane, WA | 250 | 1 of 1 | 7 ppb (7 ppb) |
| 5 | BC Water Co Kennewick, WA | 155 | 1 of 1 | 6 ppb (6 ppb) |
| 6 | Firgrove Mutual Inc Puyallup, WA | 25,492 | 1 of 3 | 3.33 ppb (0 to 10 ppb) |
| 7 | Canyon Village Water System Inc Kennewick, WA | 290 | 1 of 1 | 3 ppb (3 ppb) |
| 8 | City of Shelton Shelton, WA | 8,422 | 1 of 1 | 1 ppb (1 ppb) |
| 9 | Perch Point Resort Moses Lake, WA | 46 | 1 of 1 | 1 ppb (1 ppb) |
| 10 | Sun Harbor Water District #3 Burbank, WA | 187 | 1 of 1 | 1 ppb (1 ppb) |
Health Based Limits for Silver (total)
| Standard | Description | Level |
|---|---|---|
| Lifetime health-based limit, non-cancer risk | Concentration 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 Regulations | A 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 Level | A 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 exposure | Concentration 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 exposure | Concentration 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 Level | A 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 Type | Number of Violations |
|---|---|
| Failure to monitor regularly | 210 |