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National Drinking Water Database


Chloroform in New Hampshire


Chloroform is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in New Hampshire

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

Ranked by highest average Chloroform level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Swains Lake Village Water
Barrington, NH
1505 of 566.04 ppb
(0.09 to 127 ppb)
2Canaan Water Dept
Canaan, NH
6004 of 430.26 ppb
(0.05 to 45 ppb)
3Keene Water Dept
Keene, NH
25,0005 of 622.51 ppb
(0 to 75 ppb)
4Cedar Wood Estates
Lee, NH
303 of 420.93 ppb
(0 to 83 ppb)
5Pittsfield Aqueduct Co
Pittsfield, NH
1,5952 of 217.5 ppb
(<0.01 to 35 ppb)
6Lebanon Water Dept
Lebanon, NH
10,0504 of 417.01 ppb
(0.03 to 25 ppb)
7Mountain Lakes Water Dept
Haverhill, NH
6532 of 216.5 ppb
(<0.01 to 33 ppb)
8Reeds Crossing
Sandown, NH
404 of 415.28 ppb
(0.04 to 61 ppb)
9Bath Village Water Works
Bath, NH
952 of 214 ppb
(<0.01 to 28 ppb)
10Laconia Water Works
Laconia, NH
12,00016 of 1612.17 ppb
(0.01 to 54 ppb)

Health Based Limits for Chloroform

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.5.7 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.35 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.70 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.70 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.80 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.4000 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.4000 ppb

Violation Summary for Chloroform in New Hampshire

There are no violations reported for this contaminant in New Hampshire