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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Town of Tonawanda Water Department

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

 

113

Samples

0

Samples exceeding legal limit (MCL)

113

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201413.4 ppb28287.10 ppb - 26.8 ppb
201522.3 ppb161612.4 ppb - 37.8 ppb
201623.3 ppb161615.9 ppb - 36.4 ppb
201719.5 ppb202014.1 ppb - 30.1 ppb
201819.0 ppb171714.0 ppb - 25.9 ppb
201918.3 ppb161612.5 ppb - 28.8 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
2014-01-08140109216 DBP 1S9.00 ppb
2014-01-08140109213 DBP 1S10.00 ppb
2014-01-08140109212 DBP 1S10.00 ppb
2014-01-08140109218 DBP 1S11.0 ppb
2014-01-0814109217 DBP 1ST11.0 ppb
2014-01-08140109214 DBP 1S7.60 ppb
2014-01-08140109215 DBP 1S7.10 ppb
2014-01-08140109211 DBP1ST7.10 ppb
2014-04-11DBP 2ND Q 14 STA10.1 ppb
2014-04-112ND Q 14STAGE2DB8.40 ppb
2014-04-11STAGE 2 DBP 2NDQ8.90 ppb
2014-04-11LRAA7 2ND Q 14 D12.1 ppb
2014-04-11DBP 2ND Q 14 STA9.80 ppb
2014-04-11STAGE 2DBP 2ND Q10.9 ppb
2014-04-11LRAA8 2ND Q 14 D9.90 ppb
2014-04-11DBP2ND Q 14 STAG10.7 ppb
2014-07-09S4G11068 3RD Q 117.6 ppb
2014-07-09S4G11062 3RD Q 114.0 ppb
2014-07-09S4G11064 3RD Q 115.9 ppb
2014-07-09S4G11066 3RD Q 117.7 ppb
2014-07-09S4G11067 3RD Q 118.4 ppb
2014-07-09S4G11065 3RD Q 115.1 ppb
2014-07-09S4G1106 3RD Q 1414.4 ppb
2014-07-09S4G11063 3RD Q 117.5 ppb
2014-10-084 Q 14 DBP SIT E21.5 ppb
2014-10-084 Q 14 DBP SITE21.0 ppb
2014-10-084 Q 2014 DBP SIT26.8 ppb
2014-10-084 Q 14 DBP SITE21.6 ppb
2015-01-07107152 1ST Q 1514.5 ppb
2015-01-07010715 1 DBP 1ST15.5 ppb
2015-01-070107154 1ST Q 1514.9 ppb
2015-01-070107152 1ST Q 1516.0 ppb
2015-04-084/8/15-213.6 ppb
2015-04-084/8/15-312.6 ppb
2015-04-084/8/15-115.8 ppb
2015-04-084/8/15-412.4 ppb
2015-07-08070815 -129.8 ppb
2015-07-0807/08/15 -231.4 ppb
2015-07-0807/08/15 -435.9 ppb
2015-07-0807/08/15 -331.4 ppb
2015-10-092 4TH Q 15 DBPS24.7 ppb
2015-10-094TH Q 2015 DBPS37.8 ppb
2015-10-093 4TH Q 2015 DBP25.3 ppb
2015-10-094 15 4TH Q DBPS25.3 ppb
2016-01-050105164 DBP16.8 ppb
2016-01-050105163 DBP15.9 ppb
2016-01-0515161 DBP 1616.1 ppb
2016-01-050105162 DBP19.0 ppb
2016-04-0504/05/2016-8419.9 ppb
2016-04-0504/05/2016-426421.8 ppb
2016-04-0504/05/2016-266020.2 ppb
2016-04-0504/05/2016-297419.8 ppb
2016-07-0507/05/2016-266036.4 ppb
2016-07-0507/05/2016-8434.9 ppb
2016-07-0507/05/2016-297431.4 ppb
2016-07-0507/05/2016-426436.0 ppb
2016-10-0410/04/2016-0116.9 ppb
2016-10-0410/04/2016-0327.2 ppb
2016-10-0410/04/2016-0222.7 ppb
2016-10-0410/04/2016-0417.1 ppb
2017-01-0301/03/2017-0414.6 ppb
2017-01-0301/03/2017-0114.8 ppb
2017-01-0301/03/2017-0214.8 ppb
2017-01-0301/03/2017-0314.1 ppb
2017-04-0404201710117.8 ppb
2017-04-04042017082117.2 ppb
2017-04-04041782117.2 ppb
2017-04-0404201794317.5 ppb
2017-04-04042014094317.5 ppb
2017-04-04042017100117.8 ppb
2017-04-04042017091819.3 ppb
2017-04-0404201791819.3 ppb
2017-07-05752017111430.1 ppb
2017-07-05752017111324.8 ppb
2017-07-05752017111226.0 ppb
2017-07-05752017111527.8 ppb
2017-10-03TOT OCT 2017 DBP18.0 ppb
2017-10-03TOT OCT2017 122.7 ppb
2017-10-03TOT OCT 2017 DBP20.0 ppb
2017-10-03TOTOCT 2017 DBP19.4 ppb
2018-01-0910918 DBP9 266018.1 ppb
2018-01-090109181 1ST Q DB18.3 ppb
2018-01-0910918 2974 COLVI14.0 ppb
2018-01-0910918 84 HAWTHOR23.8 ppb
2018-01-0910918 4264 DELAW18.3 ppb
2018-04-034318 4264 DELAWA21.8 ppb
2018-04-034318 2974 COLVIN16.5 ppb
2018-04-034318 2660 NFB DB19.5 ppb
2018-04-034318 84 HAWTHORN25.9 ppb
2018-07-03DBP 3RD Q 18 29720.7 ppb
2018-07-03DBP 3RD Q 18 42622.4 ppb
2018-07-033RD Q 2018 DBP 820.3 ppb
2018-07-03DBP 3RD Q 18 26621.1 ppb
2018-10-09TONA 3 DBP 4TH Q17.7 ppb
2018-10-09TONA 2 DBP 4TH Q15.0 ppb
2018-10-09TONA 1 DBP 4TH Q16.2 ppb
2018-10-09TONA 4 DBP 4TH Q14.4 ppb
2019-01-074264 DEL15.2 ppb
2019-01-0784 HAW18.5 ppb
2019-01-072660 NIAFALLBLVD15.8 ppb
2019-01-102974 COL13.8 ppb
2019-04-094264 DELAWARE18.9 ppb
2019-04-092660 NFBLVD18.4 ppb
2019-04-0984 HAWTHORNE19.3 ppb
2019-04-092974 COLVIN12.5 ppb
2019-07-092660 NIA FALL 3Q28.8 ppb
2019-07-092974 COLVIN 3RD26.5 ppb
2019-07-0984 HAWTHORNE 3QT23.6 ppb
2019-07-094264 DELAWARE 3Q25.5 ppb
2019-10-082974 COLVIN 4QTR14.4 ppb
2019-10-084264 DEL 4QTR14.6 ppb
2019-10-082660 NIA FALLS 414.5 ppb
2019-10-0884 HAW 4QTR12.9 ppb