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National Drinking Water Database


Chloroform in Nevada


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 Nevada

31 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)
1Nps Overton Beach
Boulder City, NV
2502 of 267.05 ppb
(67 to 67.1 ppb)
2Nps Echo Bay
Boulder City, NV
2372 of 247.7 ppb
(44 to 51.4 ppb)
3Mount Rose Bowl Homeowners Association
Reno, NV
401 of 139 ppb
(39 ppb)
4Storey County Water District
Virginia City, NV
6001 of 126 ppb
(26 ppb)
5Panther Valley Water Company
Reno, NV
1,8001 of 126 ppb
(26 ppb)
6Painted Desert Wtr Users Assoc
Mt Charleston, NV
521 of 123 ppb
(23 ppb)
7Nps Callville Bay
Boulder City, NV
2502 of 313.3 ppb
(0 to 28.9 ppb)
8City of Henderson
Boulder City, NV
246,0005 of 58.66 ppb
(6.4 to 12 ppb)
9Silver Peak Water System
Goldfield, NV
1382 of 67.83 ppb
(0 to 27 ppb)
10Big Bend Water District
Laughlin, NV
8,3003 of 35.73 ppb
(0.85 to 14.25 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 Nevada

There are no violations reported for this contaminant in Nevada