Know Your Environment. Protect Your Health.

Chloroform

Lakehaven Utility District

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.

 

106

Samples

0

Samples exceeding legal limit (MCL)

86

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20189.83 ppb2421ND - 35.0 ppb
20197.14 ppb2617ND - 25.0 ppb
2020N/A00N/A
20217.86 ppb2216ND - 27.0 ppb
202211.4 ppb1816ND - 34.0 ppb
202312.2 ppb16163.40 ppb - 29.0 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
2018-01-036.80 ppb
2018-01-036.60 ppb
2018-01-034.30 ppb
2018-01-037.40 ppb
2018-05-1435.0 ppb
2018-05-1413.0 ppb
2018-05-144.80 ppb
2018-05-143.50 ppb
2018-05-1414.0 ppb
2018-05-1413.0 ppb
2018-05-1412.0 ppb
2018-05-149.30 ppb
2018-05-15ND
2018-06-190.840 ppb
2018-07-0935.0 ppb
2018-07-094.80 ppb
2018-07-0913.0 ppb
2018-07-0912.0 ppb
2018-07-10ND
2018-07-10ND
2018-10-0811.0 ppb
2018-10-080.550 ppb
2018-10-0812.0 ppb
2018-10-0817.0 ppb
2019-01-0911.0 ppb
2019-01-095.50 ppb
2019-01-0912.0 ppb
2019-01-0913.0 ppb
2019-04-116.30 ppb
2019-04-115.70 ppb
2019-04-116.80 ppb
2019-04-119.00 ppb
2019-06-05ND
2019-06-05ND
2019-06-12ND
2019-06-12ND
2019-07-0915.0 ppb
2019-07-0916.0 ppb
2019-07-095.00 ppb
2019-07-0917.0 ppb
2019-07-231.30 ppb
2019-07-31ND
2019-08-27ND
2019-09-03ND
2019-09-04ND
2019-10-0112.0 ppb
2019-10-0112.0 ppb
2019-10-0113.0 ppb
2019-10-0125.0 ppb
2019-10-30ND
2021-01-1340694708.50 ppb
2021-01-1340694698.30 ppb
2021-01-1340694719.80 ppb
2021-01-1340694724.10 ppb
2021-04-14410706212.0 ppb
2021-04-1441070619.30 ppb
2021-04-1441070634.10 ppb
2021-04-1441070608.60 ppb
2021-05-254122783ND
2021-05-254122783ND
2021-05-254122783ND
2021-07-07414911814.0 ppb
2021-07-07414912212.0 ppb
2021-07-07414912013.0 ppb
2021-07-0741491244.70 ppb
2021-07-134149400ND
2021-07-134149400ND
2021-09-144178936ND
2021-10-1341985085.50 ppb
2021-10-13419850617.0 ppb
2021-10-13419850727.0 ppb
2021-10-13419850515.0 ppb
2022-01-04428698112.0 ppb
2022-01-0442869842.00 ppb
2022-01-04428698321.0 ppb
2022-01-04428698214.0 ppb
2022-01-254234480ND
2022-01-254248102ND
2022-04-06426925715.0 ppb
2022-04-0642692644.50 ppb
2022-04-0642692489.70 ppb
2022-04-06426925211.0 ppb
2022-07-0743236835.00 ppb
2022-07-07432368114.0 ppb
2022-07-07432368213.0 ppb
2022-07-07432368014.0 ppb
2022-10-11436845034.0 ppb
2022-10-11436844813.0 ppb
2022-10-1143684519.50 ppb
2022-10-11436844913.0 ppb
2023-02-2244163908.00 ppb
2023-02-2244163933.40 ppb
2023-02-22441639210.00 ppb
2023-02-2244163918.40 ppb
2023-04-0644443215.80 ppb
2023-04-0644443189.70 ppb
2023-04-06444431911.0 ppb
2023-04-0644443208.20 ppb
2023-08-2245473045.20 ppb
2023-08-22454730322.0 ppb
2023-08-22454730213.0 ppb
2023-08-22454730114.0 ppb
2023-10-03452583616.0 ppb
2023-10-03452583717.0 ppb
2023-10-03452583914.0 ppb
2023-10-03452583829.0 ppb