Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Minden Water System

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)

125

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.66 ppb32320.690 ppb - 3.40 ppb
20191.66 ppb3230ND - 3.00 ppb
20202.25 ppb16160.920 ppb - 4.80 ppb
20210.721 ppb1612ND - 1.60 ppb
20221.73 ppb16160.830 ppb - 4.10 ppb
20231.02 ppb2019ND - 1.51 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
2018-02-08353739720010.980 ppb
2018-02-08353739720020.820 ppb
2018-02-08353739720030.930 ppb
2018-02-08353739720040.890 ppb
2018-02-08353739720010.980 ppb
2018-02-08353739720020.820 ppb
2018-02-08353739720030.930 ppb
2018-02-08353739720040.890 ppb
2018-05-03353903130013.40 ppb
2018-05-03353903130022.90 ppb
2018-05-03353903130032.70 ppb
2018-05-03353903130043.10 ppb
2018-05-03353903130013.40 ppb
2018-05-03353903130022.90 ppb
2018-05-03353903130032.70 ppb
2018-05-03353903130043.10 ppb
2018-08-13354115910010.940 ppb
2018-08-13354115910020.690 ppb
2018-08-13354115910030.990 ppb
2018-08-13354115910040.990 ppb
2018-08-13354115910010.940 ppb
2018-08-13354115910020.690 ppb
2018-08-13354115910030.990 ppb
2018-08-13354115910040.990 ppb
2018-11-01354281910012.10 ppb
2018-11-01354281910021.80 ppb
2018-11-01354281910031.90 ppb
2018-11-01354281910041.50 ppb
2018-11-01354281910012.10 ppb
2018-11-01354281910021.80 ppb
2018-11-01354281910031.90 ppb
2018-11-01354281910041.50 ppb
2019-02-07354470570011.90 ppb
2019-02-07354470570021.57 ppb
2019-02-07354470570031.80 ppb
2019-02-07354470570041.67 ppb
2019-02-07354470570011.90 ppb
2019-02-07354470570021.57 ppb
2019-02-07354470570031.80 ppb
2019-02-07354470570041.67 ppb
2019-05-23354708450012.00 ppb
2019-05-23354708450021.51 ppb
2019-05-23354708450033.00 ppb
2019-05-23354708450041.74 ppb
2019-05-23354708450012.00 ppb
2019-05-23354708450021.51 ppb
2019-05-23354708450033.00 ppb
2019-05-23354708450041.74 ppb
2019-08-21354927570011.82 ppb
2019-08-2135492757002ND
2019-08-21354927570031.26 ppb
2019-08-21354927570041.26 ppb
2019-08-21354927570011.82 ppb
2019-08-2135492757002ND
2019-08-21354927570031.26 ppb
2019-08-21354927570041.26 ppb
2019-11-18355144600011.90 ppb
2019-11-18355144600021.69 ppb
2019-11-18355144600031.80 ppb
2019-11-18355144600041.67 ppb
2019-11-18355144600011.90 ppb
2019-11-18355144600021.69 ppb
2019-11-18355144600031.80 ppb
2019-11-18355144600041.67 ppb
2020-02-26355338580014.80 ppb
2020-02-26355338580024.80 ppb
2020-02-26355338580034.80 ppb
2020-02-26355338580044.70 ppb
2020-05-11355500400011.90 ppb
2020-05-11355500400021.41 ppb
2020-05-11355500400031.70 ppb
2020-05-11355500400040.920 ppb
2020-08-20355724750011.20 ppb
2020-08-20355724750021.20 ppb
2020-08-20355724750032.10 ppb
2020-08-20355724750041.10 ppb
2020-11-06355904610011.70 ppb
2020-11-06355904610021.12 ppb
2020-11-06355904610031.60 ppb
2020-11-06355904610040.950 ppb
2021-02-22356150310010.660 ppb
2021-02-22356150310020.640 ppb
2021-02-22356150310030.550 ppb
2021-02-22356150310040.590 ppb
2021-05-24356369070011.30 ppb
2021-05-24356369070021.000 ppb
2021-05-24356369070030.830 ppb
2021-05-24356369070041.60 ppb
2021-08-0235653954001ND
2021-08-0235653954002ND
2021-08-0235653954003ND
2021-08-0235653954004ND
2021-11-23356800030011.60 ppb
2021-11-23356800030020.880 ppb
2021-11-23356800030030.970 ppb
2021-11-23356800030040.910 ppb
2022-02-16356984590012.20 ppb
2022-02-16356984590022.00 ppb
2022-02-16356984590032.20 ppb
2022-02-16356984590041.30 ppb
2022-05-18357202500011.70 ppb
2022-05-18357202500021.29 ppb
2022-05-18357202500031.80 ppb
2022-05-18357202500041.40 ppb
2022-08-16357415280011.000 ppb
2022-08-16357415280020.830 ppb
2022-08-16357415280031.30 ppb
2022-08-16357415280041.10 ppb
2022-11-04357581890011.90 ppb
2022-11-04357581890021.70 ppb
2022-11-04357581890031.90 ppb
2022-11-04357581890044.10 ppb
2023-02-13357806910011.30 ppb
2023-02-13357806910021.20 ppb
2023-02-13357806910031.30 ppb
2023-02-13357806910041.40 ppb
2023-05-24358026160011.000 ppb
2023-05-24358026160020.980 ppb
2023-05-24358026160031.50 ppb
2023-05-24358026160041.40 ppb
2023-06-06358053020041.30 ppb
2023-08-25358235100010.750 ppb
2023-08-2535823510002ND
2023-08-25358235100030.750 ppb
2023-08-25358235100040.810 ppb
2023-11-21358433780020.900 ppb
2023-11-21358433780030.980 ppb
2023-11-21358433780041.000 ppb
2023-11-28358448840011.51 ppb
2023-11-28358448840020.550 ppb
2023-11-28358448840030.910 ppb
2023-11-28358448840040.910 ppb