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National Drinking Water Database


Total haloacetic acids (HAAs) in Texas


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 Texas

1,739 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)
1Lakewood Water System
Lufkin, TX
1104 of 4120.3 ppb
(88.2 to 144 ppb)
2Zapata County Wcid Hwy 16 East
Zapata, TX
351 of 1116.6 ppb
(116.6 ppb)
3Red River Army Depot
Texarkana, TX
2,9509 of 10108.56 ppb
(0 to 167.5 ppb)
4Coke County Wsc
Robert Lee, TX
5507 of 7100.57 ppb
(35.3 to 166.6 ppb)
5City of Center
Center, TX
5,67811 of 1197.35 ppb
(46.25 to 163.8 ppb)
6Rolling Hills Subdivision
Shelbyville, TX
421 of 193.6 ppb
(93.6 ppb)
7Lone Star Wsc
Pecan Gap, TX
2345 of 592.74 ppb
(23.6 to 139.8 ppb)
8Thunderbird Bay Subdivision
Dallas, TX
80014 of 1490.91 ppb
(42.2 to 131 ppb)
9Pleasure Point Wsc
Zavalla, TX
2162 of 290.85 ppb
(41.8 to 139.9 ppb)
10Silverton Municipal Water System
Silverton, TX
7862 of 290.6 ppb
(70.4 to 110.8 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 Texas

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

Violation TypeNumber of Violations
Over maximum contaminant level, Average725
Over maximum contaminant level, Single Sample70