Know Your Environment. Protect Your Health.

Chloroform

Manchester Water Department

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.

 

290

Samples

0

Samples exceeding legal limit (MCL)

207

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20189.70 ppb4935ND - 38.0 ppb
201910.9 ppb4834ND - 56.0 ppb
202012.7 ppb4834ND - 45.9 ppb
202114.3 ppb4836ND - 65.9 ppb
202213.4 ppb4834ND - 47.2 ppb
202312.4 ppb4934ND - 45.3 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
2018-01-08AA82357-DBP127.0 ppb
2018-01-08AA82358-DBP116.0 ppb
2018-01-08AA82359-DBP15.80 ppb
2018-01-08AA82323-VOC12.30 ppb
2018-01-08AA82328-VOC1ND
2018-01-08AA82329-VOC1ND
2018-01-09AA82360-DBP113.0 ppb
2018-01-09AA82343-DBP16.20 ppb
2018-01-09AA82355-DBP111.0 ppb
2018-01-09AA82356-DBP114.0 ppb
2018-01-09AA82347-VOC10.600 ppb
2018-01-09AA82348-VOC1ND
2018-01-09AA82350-VOC1ND
2018-01-10AA82378-DBP123.0 ppb
2018-01-10AA82372-VOC1ND
2018-01-10AA82373-VOC1ND
2018-04-10AA83453-VOC1ND
2018-04-10AA83456-VOC1ND
2018-04-11AA83470-VOC10.500 ppb
2018-04-16AA83526-DBP120.0 ppb
2018-04-16AA83527-DBP12.20 ppb
2018-04-17AA83543-DBP111.0 ppb
2018-04-17AA83544-DBP14.00 ppb
2018-04-17AA83545-DBP113.0 ppb
2018-04-17AA83546-DBP18.10 ppb
2018-04-17AA83547-DBP18.40 ppb
2018-04-17AA83548-DBP15.90 ppb
2018-07-16AA84694-DBP14.80 ppb
2018-07-16AA84706-DBP125.0 ppb
2018-07-17AA84723-DBP117.0 ppb
2018-07-17AA84724-DBP113.0 ppb
2018-07-17AA84725-DBP116.0 ppb
2018-07-17AA84726-DBP18.80 ppb
2018-07-17AA84727-DBP138.0 ppb
2018-07-17AA84729-DBP120.0 ppb
2018-07-17AA84728-VOC1ND
2018-07-18AA84742-VOC1ND
2018-07-18AA84743-VOC1ND
2018-10-15AA85872-DBP112.0 ppb
2018-10-15AA85873-DBP116.0 ppb
2018-10-15AA85874-DBP126.0 ppb
2018-10-15AA85924-DBP116.0 ppb
2018-10-16AA85880-DBP17.80 ppb
2018-10-16AA85882-DBP16.10 ppb
2018-10-16AA85893-DBP129.0 ppb
2018-10-16AA85887-VOC1ND
2018-10-17AA85906-VOC1ND
2018-10-17AA85907-VOC1ND
2018-10-18AA85923-DBP128.0 ppb
2019-01-14AA86944-DBP111.0 ppb
2019-01-14AA86945-DBP12.50 ppb
2019-01-15AA86953-DBP13.70 ppb
2019-01-15AA86960-DBP13.90 ppb
2019-01-15AA86961-DBP19.40 ppb
2019-01-15AA86962-DBP15.90 ppb
2019-01-15AA86956-VOC1ND
2019-01-15AA86957-VOC1ND
2019-01-16AA86968-DBP11.40 ppb
2019-01-16AA86978-DBP18.70 ppb
2019-01-16AA86968-VOC10.510 ppb
2019-01-16AA86974-VOC1ND
2019-01-16AA86975-VOC1ND
2019-01-17AA86989-VOC1ND
2019-01-17AA86990-VOC1ND
2019-04-15AA88012-DBP14.01 ppb
2019-04-15AA88021-DBP18.01 ppb
2019-04-15AA88022-DBP112.7 ppb
2019-04-15AA88023-DBP111.8 ppb
2019-04-15AA88024-DBP111.9 ppb
2019-04-15AA88025-DBP121.0 ppb
2019-04-17AA88059-DBP113.1 ppb
2019-04-17AA88060-DBP17.68 ppb
2019-04-23AA88123-VOC1ND
2019-04-24AA88139-VOC1ND
2019-04-24AA88140-VOC1ND
2019-07-08AA89073-VOC1ND
2019-07-08AA89074-VOC1ND
2019-07-10AA89110-VOC1ND
2019-07-15AA89173-DBP114.2 ppb
2019-07-15AA89174-DBP112.8 ppb
2019-07-15AA89175-DBP119.7 ppb
2019-07-15AA89176-DBP132.9 ppb
2019-07-15AA89177-DBP119.6 ppb
2019-07-16AA89183-DBP19.46 ppb
2019-07-16AA89193-DBP12.14 ppb
2019-07-16AA89194-DBP124.7 ppb
2019-10-08AA90268-VOC1ND
2019-10-09AA90285-VOC1ND
2019-10-09AA90287-VOC10.670 ppb
2019-10-15AA90342-DBP116.0 ppb
2019-10-15AA90344-DBP133.9 ppb
2019-10-15AA90353-DBP144.8 ppb
2019-10-15AA90354-DBP156.0 ppb
2019-10-15AA90355-DBP118.0 ppb
2019-10-15AA90356-DBP122.1 ppb
2019-10-15AA90357-DBP121.5 ppb
2019-10-15AA90358-DBP136.5 ppb
2020-01-13AA91414-DBP118.3 ppb
2020-01-13AA91415-DBP111.5 ppb
2020-01-13AA91416-DBP17.03 ppb
2020-01-14AA91431-DBP113.3 ppb
2020-01-14AA91436-DBP128.2 ppb
2020-01-14AA91437-DBP126.1 ppb
2020-01-15AA91452-DBP19.24 ppb
2020-01-15AA91455-DBP110.00 ppb
2020-01-21AA91524-VOC1ND
2020-01-21AA91525-VOC1ND
2020-01-21AA91522-VOC11.04 ppb
2020-01-21AA91523-VOC1ND
2020-01-21AA91526-VOC1ND
2020-01-22AA91540-VOC1ND
2020-01-23AA91552-VOC13.19 ppb
2020-04-14AA92514-DBP115.6 ppb
2020-04-14AA92515-DBP17.90 ppb
2020-04-14AA92517-DBP113.9 ppb
2020-04-14AA92529-DBP129.4 ppb
2020-04-14AA92530-DBP119.3 ppb
2020-04-14AA92531-DBP114.6 ppb
2020-04-14AA92532-DBP121.7 ppb
2020-04-14AA92522-VOC1ND
2020-04-14AA92524-VOC1ND
2020-04-15AA92551-DBP116.6 ppb
2020-04-15AA92546-VOC1ND
2020-07-07AA93640-VOC1ND
2020-07-07AA93643-VOC1ND
2020-07-07AA93644-VOC1ND
2020-07-14AA93734-DBP12.23 ppb
2020-07-14AA93738-DBP119.9 ppb
2020-07-14AA93739-DBP114.5 ppb
2020-07-14AA93740-DBP131.5 ppb
2020-07-14AA93741-DBP120.2 ppb
2020-07-14AA93742-DBP114.2 ppb
2020-07-15AA93758-DBP111.9 ppb
2020-07-15AA93771-DBP127.6 ppb
2020-10-05AA95052-DBP115.4 ppb
2020-10-05AA95050-DBP145.9 ppb
2020-10-05AA95051-DBP137.8 ppb
2020-10-05AA95053-DBP121.7 ppb
2020-10-05AA95054-DBP120.6 ppb
2020-10-06AA95060-DBP116.2 ppb
2020-10-06AA95062-DBP126.9 ppb
2020-10-07AA95096-DBP117.4 ppb
2020-10-13AA95168-VOC1ND
2020-10-14AA95186-VOC1ND
2020-10-14AA95187-VOC1ND
2021-01-12210112-2-02 TTHM3.59 ppb
2021-01-12210112-5-01TTHM17.4 ppb
2021-01-12210112-5-02TTHM20.9 ppb
2021-01-12210112-3-04 VOCND
2021-01-13210113-2-02 TTHM14.3 ppb
2021-01-13210113-4-01TTHM13.0 ppb
2021-01-13210113-4-02TTHM22.7 ppb
2021-01-14210114-4-01TTHM7.38 ppb
2021-01-14210114-4-02TTHM7.79 ppb
2021-01-20210120-3-05 VOCND
2021-01-20210120-3-06 VOCND
2021-04-05210405-4-01TTHM31.8 ppb
2021-04-05210405-4-02TTHM16.8 ppb
2021-04-06210406-4-01TTHM11.0 ppb
2021-04-06210406-4-02TTHM11.7 ppb
2021-04-06210406-4-03TTHM17.6 ppb
2021-04-06210406-4-04TTHM5.07 ppb
2021-04-07210407-5-01TTHM7.73 ppb
2021-04-09210409-3-01TTHM23.6 ppb
2021-04-12210412-3-01VOCND
2021-04-12210412-3-02 VOCND
2021-04-12210412-3-04 VOCND
2021-04-12210412-3-05 VOCND
2021-04-13210413-3-03 VOC0.710 ppb
2021-04-14210414-1-06VOC0.620 ppb
2021-04-14210414-3-06VOC0.620 ppb
2021-07-13210713-4-01TTHM20.9 ppb
2021-07-13210713-4-02TTHM18.1 ppb
2021-07-13210713-4-03TTHM33.1 ppb
2021-07-13210713-4-04TTHM22.5 ppb
2021-07-13210713-4-05TTHM20.9 ppb
2021-07-13210713-4-06TTHM13.3 ppb
2021-07-13210713-4-07TTHM65.9 ppb
2021-07-14210714-1-06 TTHM13.4 ppb
2021-07-14210714-3-04 VOCND
2021-07-14210714-3-05 VOCND
2021-07-14210714-3-06 VOCND
2021-10-05211005-4-01TTHM15.5 ppb
2021-10-05211005-4-02TTHM28.0 ppb
2021-10-05211005-4-03TTHM26.8 ppb
2021-10-06211006-4-01TTHM54.5 ppb
2021-10-06211006-4-02TTHM16.4 ppb
2021-10-06211006-4-03TTHM36.4 ppb
2021-10-06211006-4-04TTHM22.7 ppb
2021-10-07211007-4-01TTHM40.0 ppb
2021-10-12211012-3-04 VOCND
2021-10-12211012-3-05 VOCND
2021-10-13211013-3-06 VOC1.48 ppb
2022-01-04220104-3-04 VOCND
2022-01-05220105-3-05 VOCND
2022-01-05220105-3-06 VOCND
2022-01-10220110-4-01TTHM7.82 ppb
2022-01-10220110-4-02TTHM11.1 ppb
2022-01-11220111-4-01TTHM25.5 ppb
2022-01-11220111-4-02TTHM26.5 ppb
2022-01-11220111-4-03TTHM11.5 ppb
2022-01-11220111-4-04TTHM8.56 ppb
2022-01-11220111-4-05TTHM31.3 ppb
2022-01-11220111-4-06TTHM13.1 ppb
2022-04-05220405-2-02 TTHM3.49 ppb
2022-04-05220405-4-01TTHM9.54 ppb
2022-04-05220405-4-02TTHM30.5 ppb
2022-04-05220405-4-03TTHM17.6 ppb
2022-04-05220405-4-04TTHM9.90 ppb
2022-04-05220405-4-05TTHM10.7 ppb
2022-04-05220405-4-06TTHM15.1 ppb
2022-04-05220405-4-07TTHM6.26 ppb
2022-04-13220413-3-04 VOCND
2022-04-13220413-3-05 VOCND
2022-04-13220413-3-06 VOCND
2022-07-06220706-3-05VOCND
2022-07-06220706-4-01VOCND
2022-07-12220712-5-01TTHM31.1 ppb
2022-07-12220712-5-02TTHM23.3 ppb
2022-07-12220712-5-03TTHM26.2 ppb
2022-07-12220712-5-04TTHM31.7 ppb
2022-07-12220712-5-05TTHM33.8 ppb
2022-07-12220712-5-06TTHM6.04 ppb
2022-07-12220712-5-07TTHM42.8 ppb
2022-07-12220712-5-08TTHM12.0 ppb
2022-07-18220718-3-01VOCND
2022-07-18220718-3-02 VOCND
2022-07-19220719-1-06 VOC10.1 ppb
2022-07-19220719-3-03 VOCND
2022-07-19220719-3-04 VOCND
2022-10-04221004-4-01TTHM23.2 ppb
2022-10-04221004-4-02TTHM47.2 ppb
2022-10-04221004-4-03TTHM13.5 ppb
2022-10-04221004-4-04TTHM15.9 ppb
2022-10-04221004-4-05TTHM38.6 ppb
2022-10-04221004-4-06TTHM30.5 ppb
2022-10-04221004-4-07TTHM7.28 ppb
2022-10-05221005-5-01TTHM11.1 ppb
2022-10-11221011-3-04 VOCND
2022-10-12221012-3-05 VOCND
2022-10-12221012-3-06 VOC0.630 ppb
2023-01-09230109-5-01TTHM45.3 ppb
2023-01-09230109-5-02TTHM21.7 ppb
2023-01-10230110-5-01TTHM5.45 ppb
2023-01-10230110-5-02TTHM27.2 ppb
2023-01-10230110-5-03TTHM12.5 ppb
2023-01-10230110-5-04TTHM17.2 ppb
2023-01-10230110-5-05TTHM29.5 ppb
2023-01-12230112-4-01TTHM8.59 ppb
2023-01-17230117-3-03 VOCND
2023-01-17230117-3-04 VOCND
2023-01-19230119-3-06 VOC1.11 ppb
2023-01-31230131-3-07VOCND
2023-04-03230403-3-05VOCND
2023-04-04230404-3-06VOCND
2023-04-05230405-3-04VOCND
2023-04-11230411-8-01TTHM2.03 ppb
2023-04-11230413-4-01TTHM15.8 ppb
2023-04-11230413-4-02TTHM28.7 ppb
2023-04-12230414-3-01TTHM30.2 ppb
2023-04-12230414-3-02TTHM1.07 ppb
2023-04-12230414-3-03TTHM11.2 ppb
2023-04-12230414-3-04TTHM15.0 ppb
2023-04-13230413-4-03TTHM12.6 ppb
2023-07-10230710-5-01TTHM19.7 ppb
2023-07-10230710-5-02TTHM9.02 ppb
2023-07-11230711-4-01TTHM32.9 ppb
2023-07-11230711-4-02TTHM21.7 ppb
2023-07-11230711-4-03TTHM14.8 ppb
2023-07-11230711-4-04TTHM12.4 ppb
2023-07-11230711-4-05TTHM24.8 ppb
2023-07-11230711-4-06TTHM7.61 ppb
2023-07-17230717-3-01VOCND
2023-07-17230717-3-02 VOCND
2023-07-17230717-3-03 VOCND
2023-07-17230717-3-04 VOCND
2023-07-17230717-3-05 VOCND
2023-07-19230719-3-06 VOCND
2023-09-07230907-1-06VOC14.0 ppb
2023-10-02231002-3-04VOCND
2023-10-02231002-3-05VOCND
2023-10-04231004-3-06VOCND
2023-10-10231010-5-01TTHM31.3 ppb
2023-10-10231010-5-02TTHM20.4 ppb
2023-10-10231010-5-03TTHM29.4 ppb
2023-10-10231010-5-04TTHM22.4 ppb
2023-10-11231011-4-01TTHM1.23 ppb
2023-10-11231011-4-02TTHM34.2 ppb
2023-10-11231011-4-03TTHM13.9 ppb
2023-10-11231011-4-04TTHM11.5 ppb