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National Drinking Water Database


Manganese in New Hampshire


Manganese is a naturally occurring element released from mineral deposits as well as industrial use.

The Most Polluted Communities in New Hampshire

770 water utilities reported detecting Manganese in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Manganese level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Danville Elementary
NH
4712 of 22243 ppb
(756 to 3730 ppb)
2Country Club For Kids
NH
705 of 52146 ppb
(1800 to 2650 ppb)
3Canterbury Housing Assoc
Canterbury, NH
252 of 21945.75 ppb
(201.5 to 3690 ppb)
4Old Lawrence Road Llc
NH
251 of 11940 ppb
(1940 ppb)
5Vanguard Manufacturing
NH
551 of 11800 ppb
(1800 ppb)
6Salzburg Square
NH
254 of 41385 ppb
(540 to 2200 ppb)
7Warwick Mills Inc
NH
1102 of 21001 ppb
(662 to 1340 ppb)
8Adams Mobile Home Park
Rye, NH
1587 of 7975.14 ppb
(643.5 to 1520 ppb)
9Dustin Homestead Mgt
Rochester, NH
1503 of 3946.67 ppb
(250 to 1330 ppb)
10Atkinson Academy School
NH
5542 of 2939 ppb
(48 to 1830 ppb)

Health Based Limits for Manganese

StandardDescriptionLevel
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.50 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. 50 ppb
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.300 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.300 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.1000 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.1000 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.1600 ppb

Violation Summary for Manganese in New Hampshire

There are no violations reported for this contaminant in New Hampshire