Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Slidell Water Supply

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.

 

132

Samples

0

Samples exceeding legal limit (MCL)

126

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.58 ppb32320.690 ppb - 3.10 ppb
20191.60 ppb3226ND - 3.00 ppb
20201.86 ppb16160.540 ppb - 3.00 ppb
20211.12 ppb16160.320 ppb - 2.40 ppb
20222.62 ppb16160.670 ppb - 5.60 ppb
20232.10 ppb20200.270 ppb - 6.80 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL): 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-01353718590011.20 ppb
2018-02-01353718590022.00 ppb
2018-02-01353718590031.40 ppb
2018-02-01353718590040.690 ppb
2018-02-01353718590011.20 ppb
2018-02-01353718590022.00 ppb
2018-02-01353718590031.40 ppb
2018-02-01353718590040.690 ppb
2018-05-04353902800011.50 ppb
2018-05-04353902800021.80 ppb
2018-05-04353902800030.830 ppb
2018-05-04353902800041.000 ppb
2018-05-04353902800011.50 ppb
2018-05-04353902800021.80 ppb
2018-05-04353902800030.830 ppb
2018-05-04353902800041.000 ppb
2018-08-03354087570011.80 ppb
2018-08-03354087570023.10 ppb
2018-08-03354087570030.880 ppb
2018-08-03354087570041.30 ppb
2018-08-03354087570011.80 ppb
2018-08-03354087570023.10 ppb
2018-08-03354087570030.880 ppb
2018-08-03354087570041.30 ppb
2018-11-01354280540012.20 ppb
2018-11-01354280540022.50 ppb
2018-11-01354280540031.60 ppb
2018-11-01354280540041.50 ppb
2018-11-01354280540012.20 ppb
2018-11-01354280540022.50 ppb
2018-11-01354280540031.60 ppb
2018-11-01354280540041.50 ppb
2019-02-14354488460012.40 ppb
2019-02-14354488460023.00 ppb
2019-02-14354488460031.80 ppb
2019-02-14354488460041.90 ppb
2019-02-14354488460012.40 ppb
2019-02-14354488460023.00 ppb
2019-02-14354488460031.80 ppb
2019-02-14354488460041.90 ppb
2019-05-03354660760012.20 ppb
2019-05-03354660760021.80 ppb
2019-05-03354660760031.50 ppb
2019-05-03354660760042.20 ppb
2019-05-03354660760012.20 ppb
2019-05-03354660760021.80 ppb
2019-05-03354660760031.50 ppb
2019-05-03354660760042.20 ppb
2019-08-16354911120011.90 ppb
2019-08-16354911120022.10 ppb
2019-08-16354911120031.50 ppb
2019-08-16354911120041.40 ppb
2019-08-16354911120011.90 ppb
2019-08-16354911120022.10 ppb
2019-08-16354911120031.50 ppb
2019-08-16354911120041.40 ppb
2019-11-0835511066001ND
2019-11-08355110660021.90 ppb
2019-11-0835511066003ND
2019-11-0835511066004ND
2019-11-0835511066001ND
2019-11-08355110660021.90 ppb
2019-11-0835511066003ND
2019-11-0835511066004ND
2020-02-07355294990012.00 ppb
2020-02-07355294990022.30 ppb
2020-02-07355294990031.90 ppb
2020-02-07355294990042.20 ppb
2020-05-01355471520012.00 ppb
2020-05-01355471520022.40 ppb
2020-05-01355471520031.20 ppb
2020-05-01355471520041.60 ppb
2020-08-13355706930011.10 ppb
2020-08-13355706930020.540 ppb
2020-08-13355706930032.30 ppb
2020-08-13355706930042.20 ppb
2020-11-06355905230011.90 ppb
2020-11-06355905230023.00 ppb
2020-11-06355905230031.10 ppb
2020-11-06355905230042.00 ppb
2021-02-05356100080011.10 ppb
2021-02-05356100080021.40 ppb
2021-02-05356100080030.460 ppb
2021-02-05356100080040.640 ppb
2021-05-14356338740011.50 ppb
2021-05-14356338740021.60 ppb
2021-05-14356338740030.870 ppb
2021-05-14356338740041.20 ppb
2021-08-06356537940011.80 ppb
2021-08-06356537940022.40 ppb
2021-08-06356537940031.17 ppb
2021-08-06356537940040.930 ppb
2021-11-05356762810010.640 ppb
2021-11-05356762810021.60 ppb
2021-11-05356762810030.320 ppb
2021-11-05356762810040.360 ppb
2022-02-04356955740015.50 ppb
2022-02-04356955740025.60 ppb
2022-02-04356955740034.20 ppb
2022-02-04356955740044.20 ppb
2022-05-06357159300011.10 ppb
2022-05-06357159300021.60 ppb
2022-05-06357159300031.70 ppb
2022-05-06357159300043.10 ppb
2022-08-05357373450011.20 ppb
2022-08-05357373450021.40 ppb
2022-08-05357373450032.70 ppb
2022-08-05357373450042.70 ppb
2022-11-07357587260012.90 ppb
2022-11-07357587260022.50 ppb
2022-11-07357587260030.810 ppb
2022-11-07357587260040.670 ppb
2023-02-03357769860012.10 ppb
2023-02-03357769860021.90 ppb
2023-02-03357769860030.570 ppb
2023-02-03357769860040.670 ppb
2023-05-05357977870011.50 ppb
2023-05-05357977870022.10 ppb
2023-05-05357977870031.30 ppb
2023-05-05357977870040.620 ppb
2023-08-04358183630011.20 ppb
2023-08-04358183630022.40 ppb
2023-08-04358183630030.270 ppb
2023-08-04358183630040.680 ppb
2023-08-04358183630053.80 ppb
2023-08-04358183630061.90 ppb
2023-11-02358393430011.80 ppb
2023-11-02358393430023.00 ppb
2023-11-02358393430030.740 ppb
2023-11-02358393430042.80 ppb
2023-11-02358393430055.90 ppb
2023-11-02358393430066.80 ppb