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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Goleta Water District

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.

MORE ABOUT THIS CONTAMINANT

 

192

Samples

0

Samples exceeding legal limit (MCL)

161

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201412.6 ppb3229ND - 22.0 ppb
20158.37 ppb3226ND - 16.0 ppb
20164.59 ppb3220ND - 18.0 ppb
201713.0 ppb3226ND - 35.0 ppb
201812.8 ppb3228ND - 32.0 ppb
201913.6 ppb32323.10 ppb - 31.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-02-129590-049-095921.0 ppb
2014-02-129590-050-094714.0 ppb
2014-02-129590-051-083818.0 ppb
2014-02-129590-052-090316.0 ppb
2014-02-129590-053-092821.0 ppb
2014-02-129590-054-093914.0 ppb
2014-02-129590-055-091522.0 ppb
2014-02-129590-056-085114.0 ppb
2014-05-149590-049-105019.0 ppb
2014-05-149590-050-100511.0 ppb
2014-05-149590-051-082014.0 ppb
2014-05-149590-052-085517.0 ppb
2014-05-149590-053-09309.50 ppb
2014-05-149590-054-095015.0 ppb
2014-05-149590-055-091014.0 ppb
2014-05-149590-056-084014.0 ppb
2014-08-139590-049-101017.0 ppb
2014-08-139590-050-10358.20 ppb
2014-08-139590-051-083012.0 ppb
2014-08-139590-052-091514.0 ppb
2014-08-139590-053-11157.10 ppb
2014-08-139590-054-105515.0 ppb
2014-08-139590-055-11357.00 ppb
2014-08-139590-056-08508.30 ppb
2014-12-119590-049-124517.0 ppb
2014-12-119590-050-12322.80 ppb
2014-12-119590-051-111012.0 ppb
2014-12-119590-052-113215.0 ppb
2014-12-119590-053-1200ND
2014-12-119590-054-1218ND
2014-12-119590-055-1145ND
2014-12-119590-056-112414.0 ppb
2015-02-119590-049-10358.80 ppb
2015-02-119590-050-102014.0 ppb
2015-02-119590-051-081510.00 ppb
2015-02-119590-052-0857ND
2015-02-119590-053-09458.10 ppb
2015-02-119590-054-1000ND
2015-02-119590-055-0926ND
2015-02-119590-056-084015.0 ppb
2015-05-139590-049-105711.0 ppb
2015-05-139590-050-11123.40 ppb
2015-05-139590-051-083113.0 ppb
2015-05-139590-052-090916.0 ppb
2015-05-139590-053-10103.00 ppb
2015-05-139590-054-10375.00 ppb
2015-05-139590-055-09543.40 ppb
2015-05-139590-056-085312.0 ppb
2015-08-129590-049-040012.0 ppb
2015-08-129590-050-043110.00 ppb
2015-08-129590-051-033015.0 ppb
2015-08-129590-052-030514.0 ppb
2015-08-129590-053-0418ND
2015-08-129590-054-035410.00 ppb
2015-08-129590-055-03249.60 ppb
2015-08-129590-056-031012.0 ppb
2015-12-099590-049-110113.0 ppb
2015-12-099590-050-104211.0 ppb
2015-12-099590-051-080311.0 ppb
2015-12-099590-052-0854ND
2015-12-099590-053-0949ND
2015-12-099590-054-101511.0 ppb
2015-12-099590-055-09223.40 ppb
2015-12-099590-056-083413.0 ppb
2016-02-109590-049-10472.60 ppb
2016-02-109590-050-10473.00 ppb
2016-02-109590-051-08128.80 ppb
2016-02-109590-052-0908ND
2016-02-109590-053-1133ND
2016-02-109590-054-11102.20 ppb
2016-02-109590-055-09393.10 ppb
2016-02-109590-056-084113.0 ppb
2016-05-109590-049-10156.60 ppb
2016-05-109590-050-1030ND
2016-05-109590-051-081512.0 ppb
2016-05-109590-052-0900ND
2016-05-109590-053-0940ND
2016-05-109590-054-10003.30 ppb
2016-05-109590-055-09205.20 ppb
2016-05-109590-056-084518.0 ppb
2016-08-079590-049-045518.0 ppb
2016-08-079590-050-052213.0 ppb
2016-08-079590-051-071512.0 ppb
2016-08-079590-052-06452.00 ppb
2016-08-079590-053-0410ND
2016-08-079590-054-05458.90 ppb
2016-08-079590-055-0615ND
2016-08-079590-056-03302.70 ppb
2016-12-129590-049-04472.20 ppb
2016-12-129590-050-0505ND
2016-12-129590-051-05457.50 ppb
2016-12-129590-052-0322ND
2016-12-129590-053-0403ND
2016-12-129590-054-05202.90 ppb
2016-12-129590-055-0344ND
2016-12-129590-056-0258ND
2017-02-169590-049-10302.70 ppb
2017-02-169590-050-1050ND
2017-02-169590-051-08487.40 ppb
2017-02-169590-052-0952ND
2017-02-169590-053-1008ND
2017-02-169590-054-11102.80 ppb
2017-02-169590-055-0935ND
2017-02-169590-056-09128.50 ppb
2017-05-139590-049-06303.10 ppb
2017-05-139590-050-06006.20 ppb
2017-05-139590-051-034816.0 ppb
2017-05-139590-052-04402.30 ppb
2017-05-139590-053-0518ND
2017-05-139590-054-05406.70 ppb
2017-05-139590-055-0500ND
2017-05-139590-056-04102.90 ppb
2017-08-099590-049-121828.0 ppb
2017-08-099590-050-115026.0 ppb
2017-08-099590-051-091222.0 ppb
2017-08-099590-052-102825.0 ppb
2017-08-099590-053-110021.0 ppb
2017-08-099590-054-113035.0 ppb
2017-08-099590-055-104125.0 ppb
2017-08-099590-056-094021.0 ppb
2017-12-139590-049-085019.0 ppb
2017-12-139590-050-082019.0 ppb
2017-12-139590-051-100522.0 ppb
2017-12-139590-052-063021.0 ppb
2017-12-139590-053-072018.0 ppb
2017-12-139590-054-075015.0 ppb
2017-12-139590-055-065221.0 ppb
2017-12-139590-056-060020.0 ppb
2018-02-149590-049-11002.80 ppb
2018-02-149590-050-11352.20 ppb
2018-02-149590-051-12455.40 ppb
2018-02-149590-052-0945ND
2018-02-149590-053-1038ND
2018-02-149590-054-12003.90 ppb
2018-02-149590-055-1010ND
2018-02-149590-056-09052.00 ppb
2018-05-089590-049-02307.60 ppb
2018-05-089590-050-02574.40 ppb
2018-05-089590-051-003811.0 ppb
2018-05-089590-052-01003.00 ppb
2018-05-089590-053-0155ND
2018-05-089590-054-03184.20 ppb
2018-05-089590-055-01302.60 ppb
2018-05-089590-056-00106.60 ppb
2018-08-169590-049-074032.0 ppb
2018-08-169590-050-081019.0 ppb
2018-08-169590-051-091531.0 ppb
2018-08-169590-052-061521.0 ppb
2018-08-169590-053-070517.0 ppb
2018-08-169590-054-084032.0 ppb
2018-08-169590-055-064030.0 ppb
2018-08-169590-056-055524.0 ppb
2018-11-149590-049-081819.0 ppb
2018-11-149590-050-084018.0 ppb
2018-11-149590-051-095516.0 ppb
2018-11-149590-052-064816.0 ppb
2018-11-149590-053-074822.0 ppb
2018-11-149590-055-071820.0 ppb
2018-11-149590-056-061818.0 ppb
2018-12-079590-054-085520.0 ppb
2019-02-149590-049-06206.00 ppb
2019-02-149590-050-06395.80 ppb
2019-02-149590-051-073531.0 ppb
2019-02-149590-052-05144.70 ppb
2019-02-149590-053-05468.40 ppb
2019-02-149590-054-07023.80 ppb
2019-02-149590-055-05303.10 ppb
2019-02-149590-056-050125.0 ppb
2019-05-149590-049-071011.0 ppb
2019-05-149590-050-07306.80 ppb
2019-05-149590-051-082022.0 ppb
2019-05-149590-052-06006.40 ppb
2019-05-149590-053-06458.70 ppb
2019-05-149590-054-075012.0 ppb
2019-05-149590-055-06304.40 ppb
2019-05-149590-056-05358.60 ppb
2019-08-149590-049-064020.0 ppb
2019-08-149590-050-071521.0 ppb
2019-08-149590-051-081522.0 ppb
2019-08-149590-052-044525.0 ppb
2019-08-149590-053-060019.0 ppb
2019-08-149590-054-074820.0 ppb
2019-08-149590-055-052027.0 ppb
2019-08-149590-056-085525.0 ppb
2019-11-119590-049-07156.70 ppb
2019-11-119590-050-074520.0 ppb
2019-11-119590-051-083012.0 ppb
2019-11-119590-052-05403.10 ppb
2019-11-119590-053-064016.0 ppb
2019-11-119590-054-081513.0 ppb
2019-11-119590-055-06104.40 ppb
2019-11-119590-056-050013.0 ppb