Know Your Environment. Protect Your Health.

Chloroform

Bradford City Water Authority

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.

 

96

Samples

0

Samples exceeding legal limit (MCL)

96

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201834.9 ppb161617.0 ppb - 68.0 ppb
201941.1 ppb161613.2 ppb - 72.4 ppb
202054.6 ppb161619.9 ppb - 100.0 ppb
202142.6 ppb161615.8 ppb - 82.2 ppb
202236.5 ppb161614.3 ppb - 57.6 ppb
202328.9 ppb161613.6 ppb - 49.4 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-14(704) 704 Co26.0 ppb
2018-03-14(703) 703 Co37.0 ppb
2018-03-14(701) 701 Co30.0 ppb
2018-03-14(702) 702 Co40.0 ppb
2018-06-12(703) 703 Co17.0 ppb
2018-06-12(701) 701 Co27.0 ppb
2018-06-12(704) 704 Co33.0 ppb
2018-06-12(702) 702 Co26.0 ppb
2018-09-18(703) 703 Co68.0 ppb
2018-09-18(701) 701 Co46.0 ppb
2018-09-18(704) 704 Co48.0 ppb
2018-09-18(702) 702 Co45.0 ppb
2018-12-18(702) 702 Co20.0 ppb
2018-12-18(703) 703 Co42.0 ppb
2018-12-18(704) 704 Co19.0 ppb
2018-12-18(701) 701 Co35.0 ppb
2019-03-1219C1742-0237.3 ppb
2019-03-1219C1742-0420.6 ppb
2019-03-1219C1742-0316.1 ppb
2019-03-1219C1742-0129.8 ppb
2019-06-1219F0212-0340.5 ppb
2019-06-1219F0212-0245.6 ppb
2019-06-1219F0212-0145.2 ppb
2019-06-1219F0212-0450.0 ppb
2019-09-1719I0850-0159.8 ppb
2019-09-1719I0850-0460.7 ppb
2019-09-1719I0850-0368.2 ppb
2019-09-1719I0850-0272.4 ppb
2019-12-1719L0037-0413.2 ppb
2019-12-1719L0037-0327.0 ppb
2019-12-1719L0037-0228.4 ppb
2019-12-1719L0037-0142.2 ppb
2020-03-1719.9 ppb
2020-03-1720.8 ppb
2020-03-1735.8 ppb
2020-03-1726.4 ppb
2020-06-1638.4 ppb
2020-06-1635.7 ppb
2020-06-1657.0 ppb
2020-06-1647.5 ppb
2020-09-30100.0 ppb
2020-09-3099.3 ppb
2020-09-3087.7 ppb
2020-09-3045.5 ppb
2020-12-1555.2 ppb
2020-12-1594.2 ppb
2020-12-1566.5 ppb
2020-12-1543.3 ppb
2021-03-1744.2 ppb
2021-03-1715.8 ppb
2021-03-1731.5 ppb
2021-03-1721.7 ppb
2021-06-1634.2 ppb
2021-06-1660.3 ppb
2021-06-1649.2 ppb
2021-06-1639.9 ppb
2021-09-1582.2 ppb
2021-09-1546.6 ppb
2021-09-1544.1 ppb
2021-09-1551.8 ppb
2021-12-1541.7 ppb
2021-12-1532.2 ppb
2021-12-1550.7 ppb
2021-12-1534.7 ppb
2022-03-1557.6 ppb
2022-03-1527.2 ppb
2022-03-1544.6 ppb
2022-03-1517.1 ppb
2022-06-1438.6 ppb
2022-06-1456.7 ppb
2022-06-1439.9 ppb
2022-06-1447.3 ppb
2022-09-1314.3 ppb
2022-09-1338.3 ppb
2022-09-1354.8 ppb
2022-09-1338.9 ppb
2022-12-1434.4 ppb
2022-12-1425.4 ppb
2022-12-1421.8 ppb
2022-12-1427.8 ppb
2023-03-1418.4 ppb
2023-03-1427.6 ppb
2023-03-1415.2 ppb
2023-03-1424.9 ppb
2023-06-1441.2 ppb
2023-06-1422.5 ppb
2023-06-1437.0 ppb
2023-06-1423.4 ppb
2023-09-1339.8 ppb
2023-09-1343.3 ppb
2023-09-1331.5 ppb
2023-09-1349.4 ppb
2023-12-1325.5 ppb
2023-12-1318.7 ppb
2023-12-1330.9 ppb
2023-12-1313.6 ppb