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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Erie County Water Authority (ECWA)

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

290

Samples

0

Samples exceeding legal limit (MCL)

290

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201423.4 ppb48484.90 ppb - 47.0 ppb
201521.0 ppb51518.30 ppb - 42.0 ppb
201626.0 ppb48488.40 ppb - 50.6 ppb
201723.1 ppb47476.10 ppb - 44.2 ppb
201827.0 ppb48489.10 ppb - 52.7 ppb
201926.6 ppb48488.28 ppb - 52.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-1620140216_52334.5 ppb
2014-02-1620140216_49110.3 ppb
2014-02-1620140216_3408.06 ppb
2014-02-1620140216_53022.4 ppb
2014-02-1620140216_48425.0 ppb
2014-02-1620140216_43320.4 ppb
2014-02-1820140218_104713.4 ppb
2014-02-1820140218_4029.85 ppb
2014-02-1820140218_52713.0 ppb
2014-02-1820140218_39318.8 ppb
2014-02-1820140218_29143.0 ppb
2014-02-1820140218_39112.6 ppb
2014-05-192014051920.0 ppb
2014-05-1920140519_39320.0 ppb
2014-05-1920140519_39120.0 ppb
2014-05-1920140519_29120.0 ppb
2014-05-1920140519_40214.0 ppb
2014-05-1920140519_49113.0 ppb
2014-05-1920140519_53023.0 ppb
2014-05-1920140519_104716.0 ppb
2014-05-1920140519_52714.0 ppb
2014-05-1920140519_34012.0 ppb
2014-05-1920140519_52336.0 ppb
2014-05-1920140519_48433.0 ppb
2014-08-181408F19-00537.0 ppb
2014-08-181408F19-01336.0 ppb
2014-08-181408F19-00142.0 ppb
2014-08-181408F19-00411.0 ppb
2014-08-181408F19-02244.0 ppb
2014-08-181408F19-01726.0 ppb
2014-08-181408F19-00838.0 ppb
2014-08-181408F19-01128.0 ppb
2014-08-181408F19-02033.0 ppb
2014-08-181408F19-01641.0 ppb
2014-08-181408F19-01936.0 ppb
2014-08-181408F19-00747.0 ppb
2014-11-171412027-01915.0 ppb
2014-11-171412027-01420.0 ppb
2014-11-171412027-01229.0 ppb
2014-11-171412027-0094.90 ppb
2014-11-171412027-01329.0 ppb
2014-11-171412027-00215.0 ppb
2014-11-171412027-01023.0 ppb
2014-11-171412027-00133.0 ppb
2014-11-171412027-00514.0 ppb
2014-11-171412027-00715.0 ppb
2014-11-171412027-01711.0 ppb
2014-11-171412027-00422.0 ppb
2015-02-17523-2015021735.0 ppb
2015-02-17340-201502178.90 ppb
2015-02-17391-2015021713.0 ppb
2015-02-17433-2015021714.0 ppb
2015-02-171047-2015021711.0 ppb
2015-02-17291-201502178.40 ppb
2015-02-17527-2015021713.0 ppb
2015-02-17393-2015021714.0 ppb
2015-02-17491-201502178.90 ppb
2015-02-17402-201502178.40 ppb
2015-02-17484-2015021724.0 ppb
2015-02-18530-2015021815.0 ppb
2015-05-1820150518-A17.0 ppb
2015-05-18340616W21.0 ppb
2015-05-18340616L17.0 ppb
2015-05-18340616A26.0 ppb
2015-05-18340616R25.0 ppb
2015-05-18340616B20.0 ppb
2015-05-18340616F25.0 ppb
2015-05-1834066BA16.0 ppb
2015-05-1834061624.0 ppb
2015-05-18340616ED31.0 ppb
2015-05-18340616N22.0 ppb
2015-05-182015051816.0 ppb
2015-05-18340616TR11.0 ppb
2015-05-1820150518-B26.0 ppb
2015-05-18340616M17.0 ppb
2015-08-20347018-221.0 ppb
2015-08-20347018-140.0 ppb
2015-08-21347018-419.0 ppb
2015-08-21347018-617.0 ppb
2015-08-21347018-1036.0 ppb
2015-08-21347018-731.0 ppb
2015-08-21347018-942.0 ppb
2015-08-21347018-336.0 ppb
2015-08-21347018-539.0 ppb
2015-08-21347018-1225.0 ppb
2015-08-21347018-840.0 ppb
2015-08-21347018-1123.0 ppb
2015-11-1611/16/2015-4848.30 ppb
2015-11-1611/16/2015-5238.30 ppb
2015-11-1611/16/2015-34015.0 ppb
2015-11-1611/16/2015-53017.0 ppb
2015-11-1611/16/2015-29113.0 ppb
2015-11-1611/16/2015-43327.0 ppb
2015-11-1611/16/2015-49114.0 ppb
2015-11-1611/16/2015-39323.0 ppb
2015-11-1611/16/2015-40220.0 ppb
2015-11-1611/16/2015-104723.0 ppb
2015-11-1611/16/2015-39129.0 ppb
2015-11-1611/16/2015-52718.0 ppb
2016-02-1602/16/2016-39315.0 ppb
2016-02-1602/16/2016-52710.00 ppb
2016-02-1602/16/2016-4029.10 ppb
2016-02-1602/16/2016-39119.0 ppb
2016-02-1602/16/2016-104721.0 ppb
2016-02-1602/16/2016-2918.60 ppb
2016-02-1602/16/2016-48421.0 ppb
2016-02-1702/17/2016-52330.0 ppb
2016-02-1702/17/2016-53020.0 ppb
2016-02-1802/18/2016-43314.0 ppb
2016-02-1802/18/2016-49110.00 ppb
2016-02-1802/18/2016-3408.80 ppb
2016-05-1605/16/2016-53021.0 ppb
2016-05-1605/16/2016-49115.0 ppb
2016-05-1605/16/2016-39125.0 ppb
2016-05-1605/16/2016-48428.0 ppb
2016-05-1605/16/2016-52717.0 ppb
2016-05-1605/16/2016-52316.0 ppb
2016-05-1605/16/2016-104715.0 ppb
2016-05-1605/16/2016-29114.0 ppb
2016-05-1605/16/2016-39322.0 ppb
2016-05-1605/16/2016-43332.0 ppb
2016-05-1605/16/2016-40216.0 ppb
2016-05-1605/16/2016-34014.0 ppb
2016-08-151608H81-01321.3 ppb
2016-08-151608H81-01547.2 ppb
2016-08-151608H81-00247.8 ppb
2016-08-151608H81-01245.0 ppb
2016-08-151608H81-00841.4 ppb
2016-08-151608H81-00149.8 ppb
2016-08-151608H81-00343.0 ppb
2016-08-151608H81-01050.6 ppb
2016-08-151608H81-00737.3 ppb
2016-08-151608H81-00939.3 ppb
2016-08-151608H81-01425.4 ppb
2016-08-151608H81-00541.5 ppb
2016-11-1470495601414.9 ppb
2016-11-1470495601723.6 ppb
2016-11-1470465600445.7 ppb
2016-11-1470495601132.2 ppb
2016-11-1470495601032.7 ppb
2016-11-1470495600135.3 ppb
2016-11-1470495600245.8 ppb
2016-11-147049560078.40 ppb
2016-11-1470533500130.9 ppb
2016-11-1470495600818.6 ppb
2016-11-1470495602020.4 ppb
2016-11-1470495601329.6 ppb
2017-02-21701195600912.0 ppb
2017-02-21701195600122.6 ppb
2017-02-21701195600744.2 ppb
2017-02-21701195601213.4 ppb
2017-02-21701195600211.5 ppb
2017-02-21701195600428.8 ppb
2017-02-21701195601520.6 ppb
2017-02-21701195601617.4 ppb
2017-02-21701195602111.2 ppb
2017-02-21701195601423.7 ppb
2017-02-21701195601913.0 ppb
2017-05-15FELLOW BAP 5152037.1 ppb
2017-05-15TREVETT TANK 51510.5 ppb
2017-05-15TOPS MRKT 51520116.5 ppb
2017-05-15WOHLHUETER 515224.8 ppb
2017-05-15NAPA AUTO 51520125.0 ppb
2017-05-15AUTO INF 515201731.8 ppb
2017-05-15MARILLA STAT 51514.7 ppb
2017-05-15RICE HILL 51520117.5 ppb
2017-05-153330 BAKER 5152015.1 ppb
2017-05-16LACK FIRE 2 516216.5 ppb
2017-05-16BENNING TANK 51642.5 ppb
2017-08-14702732400533.9 ppb
2017-08-14702731900432.6 ppb
2017-08-14702731800234.2 ppb
2017-08-14702731800430.6 ppb
2017-08-14702731900222.8 ppb
2017-08-14702731800732.7 ppb
2017-08-14702732400440.2 ppb
2017-08-14702732400334.9 ppb
2017-08-14702731800116.7 ppb
2017-08-14702732400130.0 ppb
2017-08-15702732400922.3 ppb
2017-08-15702732400818.4 ppb
2017-12-01703714200210.9 ppb
2017-12-01703714200428.7 ppb
2017-12-01703714201418.0 ppb
2017-12-01703714201630.1 ppb
2017-12-01703714201730.9 ppb
2017-12-01703714201823.5 ppb
2017-12-01703714200727.6 ppb
2017-12-01703714200331.9 ppb
2017-12-01703714201117.5 ppb
2017-12-01703714201312.6 ppb
2017-12-01703714202012.6 ppb
2017-12-01703714200915.4 ppb
2017-12-0170371420016.10 ppb
2018-02-12704288600117.9 ppb
2018-02-12704288601911.4 ppb
2018-02-12704288600318.7 ppb
2018-02-12704288602134.0 ppb
2018-02-1270428860129.10 ppb
2018-02-12704288601426.6 ppb
2018-02-12704288600419.5 ppb
2018-02-12704288601720.7 ppb
2018-02-12704288601011.2 ppb
2018-02-12704288601143.0 ppb
2018-02-12704288600810.00 ppb
2018-02-12704288600518.1 ppb
2018-05-14ECWA9 DBP 2ND Q18.4 ppb
2018-05-14ECWA 1 DBP 2ND Q26.4 ppb
2018-05-14ECWA7 DBP 2ND Q22.9 ppb
2018-05-14ECWA 5 DBP 2ND Q19.4 ppb
2018-05-14ECWA 6 DBP 2ND Q24.0 ppb
2018-05-14ECWA12 DBP 2ND Q24.2 ppb
2018-05-14ECWA 2 DBP 2ND Q22.0 ppb
2018-05-14ECWA10 DBP 2ND Q19.3 ppb
2018-05-14ECWA 4 DBP 2ND Q28.5 ppb
2018-05-14ECWA 3 DBP 2ND Q17.0 ppb
2018-05-15ECWA11 DBP 2ND Q16.9 ppb
2018-05-16ECWA8 DBP 2ND Q26.1 ppb
2018-08-13DBP2 ECWA 3RDQ 129.7 ppb
2018-08-13DBP 2 ECWA 3RD Q31.3 ppb
2018-08-13DBP2 ECWA 3RDQ1839.9 ppb
2018-08-13DBP2 ECWA 3RDQ 152.6 ppb
2018-08-13DBP2 ECWA 3RD Q152.7 ppb
2018-08-13DBP 2 ECWA 3RDQ145.3 ppb
2018-08-13DBP 2 ECWA 3RDQ52.1 ppb
2018-08-13DBP2 ECWA 3RDQ 152.0 ppb
2018-08-13DBP2 ECWA 3RD Q47.7 ppb
2018-08-13DBP2 ECWA 3RDQ 136.8 ppb
2018-08-13DBP2 ECWA 3RD Q122.1 ppb
2018-08-13DBP 2 ECWA 3RDQ39.7 ppb
2018-12-04ECWA 4TH Q 18 1230.3 ppb
2018-12-04ECWA DBP 4THQ 1812.6 ppb
2018-12-04ECWA DBP 4TH Q 130.3 ppb
2018-12-04DBP2 ECWA 4THQ 118.7 ppb
2018-12-04ECWA DBP 4TH Q 121.5 ppb
2018-12-04ECWA DBP 4THQ 1823.6 ppb
2018-12-04ECWA DBP 4THQ 1829.8 ppb
2018-12-04ECWA DBP2 4THQ1818.7 ppb
2018-12-04ECWA DBP2 4THQ 131.3 ppb
2018-12-04ECWA DBP2 4THQ 126.5 ppb
2018-12-04ECWA DBP 4THQ 1825.3 ppb
2018-12-04ECWA DBP 4THQ 1822.1 ppb
2019-02-19SITE 391 DBP 1ST18.4 ppb
2019-02-19SITE 340 1ST Q 217.3 ppb
2019-02-19527 DBP 1ST Q 1914.2 ppb
2019-02-19491 DBP 1ST Q 1918.3 ppb
2019-02-191047 DBP 1ST Q 118.7 ppb
2019-02-19DBP 1ST Q 29115.9 ppb
2019-02-19433 DBP 1ST Q 1926.2 ppb
2019-02-19SITE 402 DBP 1ST18.4 ppb
2019-02-19484 DBP 1ST Q 1928.0 ppb
2019-02-19523 DBP 1ST Q 1933.0 ppb
2019-02-19SITE 393 DBP 1ST20.1 ppb
2019-02-19530 DBP 1ST Q 1920.3 ppb
2019-05-211047 DBP 2ND Q 123.8 ppb
2019-05-21391 DBP 2ND Q 1926.3 ppb
2019-05-21530 DBP 2ND Q 1926.7 ppb
2019-05-21393 DBP 2ND Q 1923.8 ppb
2019-05-21291 DBP 2ND Q 1913.9 ppb
2019-05-21523 DBP 2ND Q 1920.5 ppb
2019-05-21484 DBP 2ND Q 1924.9 ppb
2019-05-21527 DBP 2ND Q 1919.1 ppb
2019-06-20491 DBP 2ND Q 1921.6 ppb
2019-06-20340 DBP 2ND Q 1915.5 ppb
2019-06-20433 DBP 2ND Q 1927.4 ppb
2019-06-20402 DBP 2ND Q 1919.6 ppb
2019-08-27484 3RD Q 19 DBP27.4 ppb
2019-08-27402 3RD Q 19 DBP42.2 ppb
2019-08-275223 3RD Q 19 DB39.9 ppb
2019-08-27291 3RD Q 19 DBP46.6 ppb
2019-08-27491 3RD Q 19 DBP34.3 ppb
2019-08-27433 3RD Q 19 DBP43.7 ppb
2019-08-27391 3RD Q 1949.4 ppb
2019-08-271047 3RD Q 19 DB44.7 ppb
2019-08-27393 3RD Q 19 DBP52.0 ppb
2019-08-27340 3RD Q 19 DBP30.1 ppb
2019-08-27527 3RD Q 19 DBP41.3 ppb
2019-08-27530 3RD Q 19 DBP49.4 ppb
2019-11-19523 4TH Q 19 DBP8.28 ppb
2019-11-19391 DBP 4TH Q27.1 ppb
2019-11-19527 4TH Q 19 DBP25.2 ppb
2019-11-191047 4TH Q 19 DB30.4 ppb
2019-11-19433 4TH Q 2019 D26.1 ppb
2019-11-19340 4TH Q DBP16.2 ppb
2019-11-19393 DBP 4TH Q25.6 ppb
2019-11-19484 4TH Q 19 DBP15.1 ppb
2019-11-19291 DBP 4TH Q18.5 ppb
2019-11-19530 4TH Q 19 DBP33.7 ppb
2019-11-19491 4TH Q 19 DBP20.0 ppb
2019-11-19402 4TH Q 2019 D16.1 ppb