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National Drinking Water Database


Silver (total) in New Hampshire


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 New Hampshire

31 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)
1Magdalen College
NH
801 of 1110 ppb
(110 ppb)
2Colby Brook Estates
Epsom, NH
881 of 148 ppb
(48 ppb)
3Olde Country Village Townhouse
Londonderry, NH
1302 of 247 ppb
(4 to 90 ppb)
4Enfield Water Dept
Enfield, NH
1,1451 of 119 ppb
(19 ppb)
528 Buttrick RD Property
NH
831 of 112 ppb
(12 ppb)
6Capital Transportation
NH
602 of 210.5 ppb
(10 to 11 ppb)
7All About ME Early Learning Ct
NH
481 of 110 ppb
(10 ppb)
8Grappone Honda
NH
401 of 17 ppb
(7 ppb)
9Old Lawrence Road Llc
NH
251 of 17 ppb
(7 ppb)
10Grappone Collision Center
NH
471 of 16 ppb
(6 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 New Hampshire

There are no violations reported for this contaminant in New Hampshire