Chloroform
Aquarion Water Company of Connecticut - Main System
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 39.3 ppb | 53 | 52 | ND - 79.0 ppb |
| 2019 | 39.7 ppb | 53 | 51 | ND - 69.0 ppb |
| 2020 | 35.4 ppb | 53 | 53 | 0.500 ppb - 71.0 ppb |
| 2021 | 37.3 ppb | 53 | 52 | ND - 60.0 ppb |
| 2022 | 37.2 ppb | 54 | 53 | ND - 69.0 ppb |
| 2023 | 36.7 ppb | 53 | 52 | ND - 69.0 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 |
|---|---|---|
| 2018-02-05 | 201801601-DBP | 15.0 ppb |
| 2018-02-05 | 201801598-DBP | 35.0 ppb |
| 2018-02-05 | 201801594-DBP | 22.0 ppb |
| 2018-02-05 | 201801565-DBP | 20.0 ppb |
| 2018-02-05 | 201801564-DBP | 34.0 ppb |
| 2018-02-05 | 201801595-DBP | 24.0 ppb |
| 2018-02-05 | 201801592-DBP | 29.0 ppb |
| 2018-02-05 | 201801559-DBP | 45.0 ppb |
| 2018-02-05 | 201801593-DBP | 23.0 ppb |
| 2018-02-05 | 201801597-DBP | 21.0 ppb |
| 2018-02-05 | 201801562-DBP | 23.0 ppb |
| 2018-02-05 | 201801600-DBP | 28.0 ppb |
| 2018-02-05 | 201801604-VOC1 | 11.0 ppb |
| 2018-02-05 | 201801570-VOC1 | 17.5 ppb |
| 2018-02-05 | 201801586-VOC1 | 15.1 ppb |
| 2018-05-07 | 201806199-DBP | 41.0 ppb |
| 2018-05-07 | 201806200-DBP | 22.0 ppb |
| 2018-05-07 | 201806209-DBP | 32.0 ppb |
| 2018-05-07 | 201806119-DBP | 28.0 ppb |
| 2018-05-07 | 201806118-DBP | 49.0 ppb |
| 2018-05-07 | 201806194-DBP | 44.0 ppb |
| 2018-05-07 | 201806196-DBP | 37.0 ppb |
| 2018-05-07 | 201806112-DBP | 59.0 ppb |
| 2018-05-07 | 201806195-DBP | 34.0 ppb |
| 2018-05-07 | 201806197-DBP | 25.0 ppb |
| 2018-05-07 | 201806115-DBP | 28.0 ppb |
| 2018-05-07 | 201806198-DBP | 52.0 ppb |
| 2018-07-05 | 201809662-VOC1 | ND |
| 2018-07-05 | 201809658-VOC1 | 0.800 ppb |
| 2018-08-06 | 201811718-DBP | 79.0 ppb |
| 2018-08-06 | 201811721-DBP | 39.0 ppb |
| 2018-08-06 | 201811656-DBP | 40.0 ppb |
| 2018-08-06 | 201811722-DBP | 62.0 ppb |
| 2018-08-06 | 201811657-DBP | 54.0 ppb |
| 2018-08-06 | 201811716-DBP | 56.0 ppb |
| 2018-08-06 | 201811714-DBP | 66.0 ppb |
| 2018-08-06 | 201811715-DBP | 56.0 ppb |
| 2018-08-06 | 201811651-DBP | 76.0 ppb |
| 2018-08-06 | 201811717-DBP | 57.0 ppb |
| 2018-08-06 | 201811653-DBP | 50.0 ppb |
| 2018-08-06 | 201811720-DBP | 71.0 ppb |
| 2018-11-09 | 201817467-DBP | 46.0 ppb |
| 2018-11-09 | 201817469-DBP | 41.0 ppb |
| 2018-11-09 | 201817479-DBP | 45.0 ppb |
| 2018-11-09 | 201817468-DBP | 52.0 ppb |
| 2018-11-09 | 201817473-DBP | 31.0 ppb |
| 2018-11-09 | 201817476-DBP | 42.0 ppb |
| 2018-11-09 | 201817478-DBP | 63.0 ppb |
| 2018-11-09 | 201817471-DBP | 48.0 ppb |
| 2018-11-09 | 201817470-DBP | 46.0 ppb |
| 2018-11-09 | 201817474-DBP | 56.0 ppb |
| 2018-11-09 | 201817481-DBP | 45.0 ppb |
| 2018-11-09 | 201817475-DBP | 47.0 ppb |
| 2019-02-04 | 201901550-DBP | 26.0 ppb |
| 2019-02-04 | 201901547-DBP | 19.0 ppb |
| 2019-02-04 | 201901573-DBP | 26.0 ppb |
| 2019-02-04 | 201901544-DBP | 25.0 ppb |
| 2019-02-04 | 201901576-DBP | 25.0 ppb |
| 2019-02-04 | 201901542-DBP | 34.0 ppb |
| 2019-02-04 | 201901575-DBP | 32.0 ppb |
| 2019-02-04 | 201901545-DBP | 26.0 ppb |
| 2019-02-04 | 201901570-DBP | 37.0 ppb |
| 2019-02-04 | 201901543-DBP | 27.0 ppb |
| 2019-02-04 | 201901548-DBP | 38.0 ppb |
| 2019-02-04 | 201901551-DBP | 15.0 ppb |
| 2019-02-04 | 201901554-VOC1 | 9.60 ppb |
| 2019-02-04 | 201901581-VOC1 | 21.1 ppb |
| 2019-02-04 | 201901613-VOC1 | 20.8 ppb |
| 2019-05-06 | 201906110-DBP | 42.0 ppb |
| 2019-05-06 | 201906084-DBP | 38.0 ppb |
| 2019-05-06 | 201906086-DBP | 44.0 ppb |
| 2019-05-06 | 201906113-DBP | 38.0 ppb |
| 2019-05-06 | 201906088-DBP | 49.0 ppb |
| 2019-05-06 | 201906085-DBP | 48.0 ppb |
| 2019-05-06 | 201906098-DBP | 53.0 ppb |
| 2019-05-06 | 201906116-DBP | 32.0 ppb |
| 2019-05-06 | 201906083-DBP | 49.0 ppb |
| 2019-05-06 | 201906115-DBP | 36.0 ppb |
| 2019-05-06 | 201906087-DBP | 47.0 ppb |
| 2019-05-06 | 201906089-DBP | 33.0 ppb |
| 2019-07-01 | 201909695-VOC1 | ND |
| 2019-07-01 | 201909693-VOC1 | ND |
| 2019-08-05 | 201912220-DBP | 55.0 ppb |
| 2019-08-05 | 201912170-DBP | 41.0 ppb |
| 2019-08-05 | 201912166-DBP | 31.0 ppb |
| 2019-08-05 | 201912219-DBP | 54.0 ppb |
| 2019-08-05 | 201912218-DBP | 56.0 ppb |
| 2019-08-05 | 201912221-DBP | 56.0 ppb |
| 2019-08-05 | 201912167-DBP | 46.0 ppb |
| 2019-08-05 | 201912222-DBP | 43.0 ppb |
| 2019-08-05 | 201912224-DBP | 63.0 ppb |
| 2019-08-05 | 201912225-DBP | 67.0 ppb |
| 2019-08-05 | 201912169-DBP | 39.0 ppb |
| 2019-08-06 | 201912353-DBP | 60.0 ppb |
| 2019-11-04 | 201918122-DBP | 69.0 ppb |
| 2019-11-04 | 201918123-DBP | 33.0 ppb |
| 2019-11-04 | 201918132-DBP | 51.0 ppb |
| 2019-11-04 | 201918045-DBP | 38.0 ppb |
| 2019-11-04 | 201918135-DBP | 53.0 ppb |
| 2019-11-04 | 201918133-DBP | 59.0 ppb |
| 2019-11-04 | 201918044-DBP | 42.0 ppb |
| 2019-11-04 | 201918041-DBP | 51.0 ppb |
| 2019-11-04 | 201918134-DBP | 55.0 ppb |
| 2019-11-04 | 201918136-DBP | 51.0 ppb |
| 2019-11-04 | 201918043-DBP | 41.0 ppb |
| 2019-11-04 | 201918121-DBP | 57.0 ppb |
| 2020-02-03 | 202001677-DBP | 30.0 ppb |
| 2020-02-03 | 202001674-DBP | 24.0 ppb |
| 2020-02-03 | 202001616-DBP | 25.0 ppb |
| 2020-02-03 | 202001678-DBP | 19.0 ppb |
| 2020-02-03 | 202001672-DBP | 29.0 ppb |
| 2020-02-03 | 202001669-DBP | 36.0 ppb |
| 2020-02-03 | 202001618-DBP | 29.0 ppb |
| 2020-02-03 | 202001613-DBP | 37.0 ppb |
| 2020-02-03 | 202001670-DBP | 28.0 ppb |
| 2020-02-03 | 202001675-DBP | 29.0 ppb |
| 2020-02-03 | 202001671-DBP | 29.0 ppb |
| 2020-02-03 | 202001619-DBP | 22.0 ppb |
| 2020-02-03 | 202001681-VOC1 | 12.7 ppb |
| 2020-02-03 | 202001624-VOC1 | 19.7 ppb |
| 2020-02-03 | 202001640-VOC1 | 13.8 ppb |
| 2020-05-04 | 202006196-DBP | 25.0 ppb |
| 2020-05-04 | 202006195-DBP | 36.0 ppb |
| 2020-05-04 | 202006192-DBP | 41.0 ppb |
| 2020-05-04 | 202006194-DBP | 27.0 ppb |
| 2020-05-06 | 202006387-DBP | 37.0 ppb |
| 2020-05-06 | 202006389-DBP | 23.0 ppb |
| 2020-05-06 | 202006383-DBP | 34.0 ppb |
| 2020-05-06 | 202006388-DBP | 35.0 ppb |
| 2020-05-06 | 202006386-DBP | 29.0 ppb |
| 2020-05-06 | 202006384-DBP | 35.0 ppb |
| 2020-05-06 | 202006398-DBP | 34.0 ppb |
| 2020-05-06 | 202006385-DBP | 34.0 ppb |
| 2020-07-07 | 202010259-VOC1 | 0.500 ppb |
| 2020-07-07 | 202010253-VOC1 | 1.50 ppb |
| 2020-08-03 | 202011743-DBP | 45.0 ppb |
| 2020-08-03 | 202011680-DBP | 43.0 ppb |
| 2020-08-03 | 202011741-DBP | 45.0 ppb |
| 2020-08-03 | 202011677-DBP | 65.0 ppb |
| 2020-08-03 | 202011742-DBP | 38.0 ppb |
| 2020-08-03 | 202011744-DBP | 38.0 ppb |
| 2020-08-03 | 202011679-DBP | 45.0 ppb |
| 2020-08-03 | 202011746-DBP | 43.0 ppb |
| 2020-08-03 | 202011747-DBP | 29.0 ppb |
| 2020-08-03 | 202011755-DBP | 47.0 ppb |
| 2020-08-03 | 202011681-DBP | 41.0 ppb |
| 2020-08-03 | 202011745-DBP | 45.0 ppb |
| 2020-11-02 | 202017860-DBP | 71.0 ppb |
| 2020-11-02 | 202017870-DBP | 47.0 ppb |
| 2020-11-02 | 202017813-DBP | 33.0 ppb |
| 2020-11-02 | 202017861-DBP | 49.0 ppb |
| 2020-11-02 | 202017873-DBP | 49.0 ppb |
| 2020-11-02 | 202017871-DBP | 53.0 ppb |
| 2020-11-02 | 202017812-DBP | 41.0 ppb |
| 2020-11-02 | 202017809-DBP | 56.0 ppb |
| 2020-11-02 | 202017872-DBP | 45.0 ppb |
| 2020-11-02 | 202017874-DBP | 41.0 ppb |
| 2020-11-02 | 202017811-DBP | 37.0 ppb |
| 2020-11-02 | 202017859-DBP | 53.0 ppb |
| 2021-02-02 | 202101442-DBP | 41.0 ppb |
| 2021-02-02 | 202101439-DBP | 29.0 ppb |
| 2021-02-02 | 202101389-DBP | 16.0 ppb |
| 2021-02-02 | 202101445-DBP | 20.0 ppb |
| 2021-02-02 | 202101388-DBP | 31.0 ppb |
| 2021-02-02 | 202101384-DBP | 31.0 ppb |
| 2021-02-02 | 202101386-DBP | 20.0 ppb |
| 2021-02-02 | 202101444-DBP | 32.0 ppb |
| 2021-02-02 | 202101448-VOC1 | 17.8 ppb |
| 2021-02-02 | 202101394-VOC1 | 15.5 ppb |
| 2021-02-02 | 202101406-VOC1 | 13.4 ppb |
| 2021-02-03 | 202101530-DBP | 44.0 ppb |
| 2021-02-03 | 202101528-DBP | 24.0 ppb |
| 2021-02-03 | 202101527-DBP | 31.0 ppb |
| 2021-02-03 | 202101529-DBP | 33.0 ppb |
| 2021-05-03 | 202106164-DBP | 46.0 ppb |
| 2021-05-03 | 202106162-DBP | 36.0 ppb |
| 2021-05-03 | 202106078-DBP | 33.0 ppb |
| 2021-05-03 | 202106163-DBP | 52.0 ppb |
| 2021-05-03 | 202106165-DBP | 37.0 ppb |
| 2021-05-03 | 202106173-DBP | 43.0 ppb |
| 2021-05-03 | 202106080-DBP | 31.0 ppb |
| 2021-05-03 | 202106161-DBP | 43.0 ppb |
| 2021-05-03 | 202106159-DBP | 48.0 ppb |
| 2021-05-03 | 202106079-DBP | 39.0 ppb |
| 2021-05-03 | 202106076-DBP | 52.0 ppb |
| 2021-05-03 | 202106160-DBP | 44.0 ppb |
| 2021-07-06 | 202110289-VOC1 | ND |
| 2021-07-06 | 202110283-VOC1 | 1.70 ppb |
| 2021-08-02 | 202112058-DBP | 35.0 ppb |
| 2021-08-02 | 202112065-DBP | 44.0 ppb |
| 2021-08-02 | 202112024-DBP | 34.0 ppb |
| 2021-08-02 | 202112068-DBP | 44.0 ppb |
| 2021-08-02 | 202112067-DBP | 56.0 ppb |
| 2021-08-02 | 202112034-DBP | 37.0 ppb |
| 2021-08-02 | 202112057-DBP | 53.0 ppb |
| 2021-08-02 | 202112033-DBP | 54.0 ppb |
| 2021-08-02 | 202112066-DBP | 47.0 ppb |
| 2021-08-02 | 202112069-DBP | 38.0 ppb |
| 2021-08-02 | 202112022-DBP | 35.0 ppb |
| 2021-08-02 | 202112056-DBP | 51.0 ppb |
| 2021-11-01 | 202117949-DBP | 46.0 ppb |
| 2021-11-01 | 202117950-DBP | 31.0 ppb |
| 2021-11-01 | 202117957-DBP | 44.0 ppb |
| 2021-11-01 | 202117958-DBP | 48.0 ppb |
| 2021-11-01 | 202117959-DBP | 53.0 ppb |
| 2021-11-01 | 202117960-DBP | 43.0 ppb |
| 2021-11-01 | 202117961-DBP | 32.0 ppb |
| 2021-11-01 | 202117962-DBP | 59.0 ppb |
| 2021-11-01 | 202117891-DBP | 44.0 ppb |
| 2021-11-01 | 202117893-DBP | 39.0 ppb |
| 2021-11-01 | 202117902-DBP | 60.0 ppb |
| 2021-11-01 | 202117903-DBP | 48.0 ppb |
| 2022-02-07 | 202202014-DBP | 32.0 ppb |
| 2022-02-07 | 202202016-DBP | 28.0 ppb |
| 2022-02-07 | 202202017-DBP | 38.0 ppb |
| 2022-02-07 | 202202018-DBP | 22.0 ppb |
| 2022-02-07 | 202202030-DBP | 35.0 ppb |
| 2022-02-07 | 202202082-DBP | 21.0 ppb |
| 2022-02-07 | 202202083-DBP | 24.0 ppb |
| 2022-02-07 | 202202084-DBP | 18.0 ppb |
| 2022-02-07 | 202202085-DBP | 34.0 ppb |
| 2022-02-07 | 202202086-DBP | 24.0 ppb |
| 2022-02-07 | 202202087-DBP | 20.0 ppb |
| 2022-02-07 | 202202090-VOC1 | 14.4 ppb |
| 2022-02-07 | 202202022-VOC1 | 16.8 ppb |
| 2022-02-07 | 202202033-VOC1 | 16.5 ppb |
| 2022-02-09 | 202202306-DBP | 22.0 ppb |
| 2022-05-02 | 202206717-DBP | 46.0 ppb |
| 2022-05-02 | 202206718-DBP | 41.0 ppb |
| 2022-05-02 | 202206719-DBP | 33.0 ppb |
| 2022-05-02 | 202206720-DBP | 36.0 ppb |
| 2022-05-02 | 202206721-DBP | 45.0 ppb |
| 2022-05-02 | 202206722-DBP | 38.0 ppb |
| 2022-05-02 | 202206723-DBP | 27.0 ppb |
| 2022-05-02 | 202206731-DBP | 34.0 ppb |
| 2022-05-02 | 202206654-DBP | 49.0 ppb |
| 2022-05-02 | 202206656-DBP | 35.0 ppb |
| 2022-05-02 | 202206657-DBP | 69.0 ppb |
| 2022-05-02 | 202206658-DBP | 32.0 ppb |
| 2022-05-31 | 202208625-DBP | 42.0 ppb |
| 2022-07-05 | 202210995-VOC1 | ND |
| 2022-07-05 | 202210989-VOC1 | 1.000 ppb |
| 2022-08-01 | 202213140-DBP | 62.0 ppb |
| 2022-08-01 | 202213142-DBP | 36.0 ppb |
| 2022-08-01 | 202213143-DBP | 45.0 ppb |
| 2022-08-01 | 202213144-DBP | 34.0 ppb |
| 2022-08-01 | 202213214-DBP | 55.0 ppb |
| 2022-08-01 | 202213215-DBP | 44.0 ppb |
| 2022-08-01 | 202213216-DBP | 53.0 ppb |
| 2022-08-01 | 202213217-DBP | 39.0 ppb |
| 2022-08-01 | 202213218-DBP | 48.0 ppb |
| 2022-08-01 | 202213219-DBP | 50.0 ppb |
| 2022-08-01 | 202213220-DBP | 39.0 ppb |
| 2022-08-01 | 202213227-DBP | 35.0 ppb |
| 2022-11-07 | 202220353-DBP | 43.0 ppb |
| 2022-11-07 | 202220355-DBP | 41.0 ppb |
| 2022-11-07 | 202220364-DBP | 63.0 ppb |
| 2022-11-07 | 202220365-DBP | 69.0 ppb |
| 2022-11-07 | 202220405-DBP | 43.0 ppb |
| 2022-11-07 | 202220406-DBP | 41.0 ppb |
| 2022-11-07 | 202220413-DBP | 44.0 ppb |
| 2022-11-07 | 202220414-DBP | 47.0 ppb |
| 2022-11-07 | 202220415-DBP | 54.0 ppb |
| 2022-11-07 | 202220416-DBP | 42.0 ppb |
| 2022-11-07 | 202220417-DBP | 35.0 ppb |
| 2022-11-07 | 202220418-DBP | 55.0 ppb |
| 2023-02-06 | 202301846-DBP | 24.0 ppb |
| 2023-02-06 | 202301847-DBP | 30.0 ppb |
| 2023-02-06 | 202301848-DBP | 22.0 ppb |
| 2023-02-06 | 202301849-DBP | 38.0 ppb |
| 2023-02-06 | 202301850-DBP | 28.0 ppb |
| 2023-02-06 | 202301851-DBP | 28.0 ppb |
| 2023-02-06 | 202301854-VOC1 | 17.4 ppb |
| 2023-02-06 | 202301775-VOC1 | 14.2 ppb |
| 2023-02-09 | 202302131-DBP | 41.0 ppb |
| 2023-02-09 | 202302132-DBP | 26.0 ppb |
| 2023-02-09 | 202302133-DBP | 30.0 ppb |
| 2023-02-09 | 202302134-DBP | 31.0 ppb |
| 2023-02-09 | 202302135-DBP | 23.0 ppb |
| 2023-02-09 | 202302139-VOC1 | 19.8 ppb |
| 2023-02-22 | 202302977-DBP | 42.0 ppb |
| 2023-05-01 | 202306928-DBP | 42.0 ppb |
| 2023-05-01 | 202306929-DBP | 31.0 ppb |
| 2023-05-01 | 202306930-DBP | 40.0 ppb |
| 2023-05-01 | 202306931-DBP | 39.0 ppb |
| 2023-05-01 | 202306932-DBP | 50.0 ppb |
| 2023-05-01 | 202306933-DBP | 36.0 ppb |
| 2023-05-01 | 202306934-DBP | 30.0 ppb |
| 2023-05-01 | 202306942-DBP | 44.0 ppb |
| 2023-05-02 | 202306982-DBP | 61.0 ppb |
| 2023-05-02 | 202306984-DBP | 28.0 ppb |
| 2023-05-02 | 202306985-DBP | 34.0 ppb |
| 2023-05-11 | 202308149-DBP | 23.0 ppb |
| 2023-06-07 | 202309441-VOC1 | ND |
| 2023-06-07 | 202309440-VOC1 | 0.700 ppb |
| 2023-08-08 | 202313915-DBP | 69.0 ppb |
| 2023-08-08 | 202313916-DBP | 59.0 ppb |
| 2023-08-08 | 202313917-DBP | 43.0 ppb |
| 2023-08-08 | 202313918-DBP | 63.0 ppb |
| 2023-08-08 | 202313919-DBP | 54.0 ppb |
| 2023-08-08 | 202313920-DBP | 52.0 ppb |
| 2023-08-08 | 202313921-DBP | 48.0 ppb |
| 2023-08-08 | 202313922-DBP | 60.0 ppb |
| 2023-08-08 | 202313923-DBP | 46.0 ppb |
| 2023-08-08 | 202313924-DBP | 36.0 ppb |
| 2023-08-08 | 202313925-DBP | 41.0 ppb |
| 2023-08-08 | 202313926-DBP | 35.0 ppb |
| 2023-11-09 | 202320770-DBP | 42.0 ppb |
| 2023-11-09 | 202320771-DBP | 45.0 ppb |
| 2023-11-09 | 202320772-DBP | 35.0 ppb |
| 2023-11-09 | 202320773-DBP | 53.0 ppb |
| 2023-11-09 | 202320774-DBP | 35.0 ppb |
| 2023-11-09 | 202320775-DBP | 38.0 ppb |
| 2023-11-09 | 202320776-DBP | 35.0 ppb |
| 2023-11-09 | 202320777-DBP | 45.0 ppb |
| 2023-11-09 | 202320778-DBP | 39.0 ppb |
| 2023-11-09 | 202320779-DBP | 32.0 ppb |
| 2023-11-09 | 202320780-DBP | 35.0 ppb |
| 2023-11-09 | 202320781-DBP | 32.0 ppb |