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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Cucamonga Valley 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)

121

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20147.58 ppb3220ND - 20.0 ppb
20152.61 ppb3213ND - 13.0 ppb
20163.14 ppb3214ND - 16.0 ppb
20176.29 ppb3225ND - 21.0 ppb
20186.71 ppb3225ND - 22.0 ppb
20196.76 ppb3224ND - 26.0 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
2014-01-099590-601-120016.0 ppb
2014-01-099590-602-105012.0 ppb
2014-01-099590-603-114516.0 ppb
2014-01-099590-604-092018.0 ppb
2014-01-099590-605-094019.0 ppb
2014-01-099590-606-112520.0 ppb
2014-01-099590-607-111012.0 ppb
2014-01-099590-608-1010ND
2014-04-019590-601-120713.0 ppb
2014-04-019590-602-1049ND
2014-04-019590-603-114512.0 ppb
2014-04-019590-604-0855ND
2014-04-019590-605-0912ND
2014-04-019590-606-11006.50 ppb
2014-04-019590-607-1006ND
2014-04-019590-608-0945ND
2014-07-079590-601-104015.0 ppb
2014-07-079590-602-09255.50 ppb
2014-07-079590-603-081216.0 ppb
2014-07-079590-604-0825ND
2014-07-079590-605-0840ND
2014-07-079590-606-101015.0 ppb
2014-07-079590-607-09508.40 ppb
2014-07-079590-608-0905ND
2014-10-069590-601-11347.30 ppb
2014-10-069590-602-08353.70 ppb
2014-10-069590-603-112010.00 ppb
2014-10-069590-604-1102ND
2014-10-069590-605-1040ND
2014-10-069590-606-082014.0 ppb
2014-10-069590-607-08503.30 ppb
2014-10-069590-608-0920ND
2015-01-059590-601-12457.70 ppb
2015-01-059590-602-0905ND
2015-01-059590-603-122011.0 ppb
2015-01-059590-604-1150ND
2015-01-059590-605-11302.00 ppb
2015-01-059590-606-1110ND
2015-01-059590-607-1015ND
2015-01-059590-608-1030ND
2015-04-019590-601-11557.00 ppb
2015-04-019590-602-1109ND
2015-04-019590-603-08358.90 ppb
2015-04-019590-604-0852ND
2015-04-019590-605-0940ND
2015-04-019590-606-11258.40 ppb
2015-04-019590-607-10572.60 ppb
2015-04-019590-608-1012ND
2015-07-029590-601-10503.50 ppb
2015-07-029590-602-1015ND
2015-07-029590-603-08304.00 ppb
2015-07-029590-604-0835ND
2015-07-029590-605-0840ND
2015-07-029590-606-1030ND
2015-07-029590-607-1005ND
2015-07-029590-608-0945ND
2015-10-069590-601-13007.20 ppb
2015-10-069590-602-09304.10 ppb
2015-10-069590-603-080013.0 ppb
2015-10-069590-604-0815ND
2015-10-069590-605-0840ND
2015-10-069590-606-10204.20 ppb
2015-10-069590-607-0955ND
2015-10-069590-608-0900ND
2016-01-069590-601-13352.80 ppb
2016-01-069590-602-0930ND
2016-01-069590-603-08102.40 ppb
2016-01-069590-604-0815ND
2016-01-069590-605-0840ND
2016-01-069590-606-1020ND
2016-01-069590-607-0955ND
2016-01-069590-608-0900ND
2016-04-059590-601-114512.0 ppb
2016-04-059590-602-1035ND
2016-04-059590-603-082414.0 ppb
2016-04-059590-604-0842ND
2016-04-059590-605-09103.30 ppb
2016-04-059590-606-11072.00 ppb
2016-04-059590-607-10502.10 ppb
2016-04-059590-608-09454.60 ppb
2016-07-069590-601-13108.60 ppb
2016-07-069590-602-1035ND
2016-07-069590-603-082016.0 ppb
2016-07-069590-604-0826ND
2016-07-069590-605-0840ND
2016-07-069590-606-115513.0 ppb
2016-07-069590-607-1130ND
2016-07-069590-608-0925ND
2016-10-059590-601-11203.50 ppb
2016-10-059590-602-1055ND
2016-10-059590-603-08109.00 ppb
2016-10-059590-604-0825ND
2016-10-059590-605-0855ND
2016-10-059590-606-10307.10 ppb
2016-10-059590-607-1010ND
2016-10-059590-608-0910ND
2017-01-099590-601-11205.00 ppb
2017-01-099590-602-10552.30 ppb
2017-01-099590-603-08108.50 ppb
2017-01-099590-604-08254.50 ppb
2017-01-099590-605-08553.30 ppb
2017-01-099590-606-10308.90 ppb
2017-01-099590-607-10104.20 ppb
2017-01-099590-608-0910ND
2017-04-059590-601-11008.70 ppb
2017-04-059590-602-09556.50 ppb
2017-04-059590-603-104514.0 ppb
2017-04-059590-604-082713.0 ppb
2017-04-059590-605-084515.0 ppb
2017-04-059590-606-102021.0 ppb
2017-04-059590-607-093513.0 ppb
2017-04-059590-608-0915ND
2017-07-069590-601-11133.80 ppb
2017-07-069590-602-1028ND
2017-07-069590-603-10594.90 ppb
2017-07-069590-604-0913ND
2017-07-069590-605-0927ND
2017-07-069590-606-10407.10 ppb
2017-07-069590-607-1014ND
2017-07-069590-608-0955ND
2017-10-059590-601-12416.90 ppb
2017-10-059590-602-11406.20 ppb
2017-10-059590-603-12187.40 ppb
2017-10-059590-604-10166.60 ppb
2017-10-059590-605-10355.80 ppb
2017-10-059590-606-11528.90 ppb
2017-10-059590-607-11256.80 ppb
2017-10-059590-608-10599.00 ppb
2018-01-119590-601-12015.10 ppb
2018-01-119590-602-1058ND
2018-01-119590-603-11387.70 ppb
2018-01-119590-604-0913ND
2018-01-119590-605-093322.0 ppb
2018-01-119590-606-11154.60 ppb
2018-01-119590-607-10384.90 ppb
2018-01-119590-608-101912.0 ppb
2018-04-059590-601-1121ND
2018-04-059590-602-1028ND
2018-04-059590-603-11056.90 ppb
2018-04-059590-604-0831ND
2018-04-059590-605-09116.40 ppb
2018-04-059590-606-104311.0 ppb
2018-04-059590-607-10119.80 ppb
2018-04-059590-608-0949ND
2018-07-099588-601-12456.00 ppb
2018-07-099588-602-11073.90 ppb
2018-07-099588-603-11406.30 ppb
2018-07-099588-604-09455.70 ppb
2018-07-099588-605-10063.60 ppb
2018-07-099588-606-11208.30 ppb
2018-07-099588-607-10506.00 ppb
2018-07-099588-608-1030ND
2018-10-099588-601-14149.60 ppb
2018-10-099588-602-11128.40 ppb
2018-10-099588-603-134911.0 ppb
2018-10-099588-604-071811.0 ppb
2018-10-099588-605-075611.0 ppb
2018-10-099588-606-124614.0 ppb
2018-10-099588-607-10579.90 ppb
2018-10-099588-608-09529.60 ppb
2019-01-099588-601-11478.70 ppb
2019-01-099588-602-10559.10 ppb
2019-01-099588-603-113111.0 ppb
2019-01-099588-604-080010.00 ppb
2019-01-099588-605-09119.80 ppb
2019-01-099588-606-11108.60 ppb
2019-01-099588-607-10057.80 ppb
2019-01-099588-608-09378.40 ppb
2019-04-049588-601-09209.40 ppb
2019-04-049588-602-082011.0 ppb
2019-04-049588-603-090012.0 ppb
2019-04-049588-604-070011.0 ppb
2019-04-049588-605-072011.0 ppb
2019-04-049588-606-084011.0 ppb
2019-04-049588-607-080026.0 ppb
2019-04-049588-608-074014.0 ppb
2019-07-089588-601-12103.90 ppb
2019-07-089588-602-1055ND
2019-07-089588-603-11455.70 ppb
2019-07-089588-604-0930ND
2019-07-089588-605-0950ND
2019-07-089588-606-11207.30 ppb
2019-07-089588-607-10357.60 ppb
2019-07-089588-608-10157.40 ppb
2019-10-079588-601-12101.10 ppb
2019-10-079588-602-1055ND
2019-10-079588-603-11452.00 ppb
2019-10-079588-604-0915ND
2019-10-079588-605-0940ND
2019-10-079588-606-11202.60 ppb
2019-10-079588-607-1035ND
2019-10-079588-608-1015ND