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National Drinking Water Database


Total haloacetic acids (HAAs) in North Carolina


Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid. [read more]

The Most Polluted Communities in North Carolina

1,125 water utilities reported detecting Total haloacetic acids (HAAs) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Total haloacetic acids (HAAs) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1City of Siler City
Siler City, NC
8,54019 of 1977.68 ppb
(35 to 117.4 ppb)
2Snug Harbor ON Nelson Bay
Sea Level, NC
1089 of 975.78 ppb
(6.1 to 120 ppb)
3Town of Wadesboro
Wadesboro, NC
5,65522 of 2274.34 ppb
(22.5 to 150.3 ppb)
4Goldston-Gulf Sanitary Dist
Goldston, NC
1,44319 of 1970.67 ppb
(15 to 123 ppb)
5Stanfield #3-Polk Ford/Renee Ford
Stanfield, NC
3187 of 766.99 ppb
(49.7 to 84.8 ppb)
6Town of Franklinville
Franklinville, NC
1,36016 of 1865.98 ppb
(0 to 130 ppb)
7Stanfield #1-Biglick Rd
Stanfield, NC
257 of 763.49 ppb
(41 to 85.8 ppb)
8Beard Acres
Sophia, NC
15714 of 1463.1 ppb
(28.4 to 160 ppb)
9Carolina Forest Water System
Troy, NC
47510 of 1061.18 ppb
(38.5 to 90 ppb)
10Handy Sanitary District
Denton, NC
7,89919 of 1960.37 ppb
(30 to 90 ppb)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 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.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. 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
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.450 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.5200 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.5200 ppb

Violation Summary for Total haloacetic acids (HAAs) in North Carolina

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in North Carolina since 2004

Violation TypeNumber of Violations
Monitoring and Reporting Disinfection Byproduct Rule519
Over maximum contaminant level, Average321
Over maximum contaminant level, Single Sample1