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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Monroe Twp MUA

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

 

392

Samples

0

Samples exceeding legal limit (MCL)

114

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.537 ppb12048ND - 5.03 ppb
20150.415 ppb11948ND - 4.21 ppb
20161.06 ppb4920ND - 6.80 ppb
20171.06 ppb3620ND - 5.80 ppb
20181.04 ppb3418ND - 3.30 ppb
20191.28 ppb3418ND - 6.10 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
2014-01-08L4861520-2ND
2014-01-08L4861515-2ND
2014-01-08L4861520-4ND
2014-01-15L4869367-2ND
2014-01-15L4869365-2ND
2014-01-15L4869367-40.0500 ppb
2014-01-15L4869367-60.1000 ppb
2014-01-29L4806346-10.120 ppb
2014-02-04L4900199-2ND
2014-02-04L4900197-2ND
2014-02-04L4900199-60.140 ppb
2014-02-12L4905594-2ND
2014-02-12L4905592-2ND
2014-02-12L4905594-4ND
2014-02-12L4905594-60.160 ppb
2014-02-14L4899932-41.58 ppb
2014-02-14L4899932-32.84 ppb
2014-02-14L4899932-22.94 ppb
2014-02-14L4899932-12.80 ppb
2014-02-26L4421456-24.56 ppb
2014-02-26L4837290-15.03 ppb
2014-03-05L4941110-2ND
2014-03-05L4941108-2ND
2014-03-05L4941110-40.0400 ppb
2014-03-05L4941110-60.150 ppb
2014-03-12L4947427-20.130 ppb
2014-03-12L4947425-2ND
2014-03-12L4947427-4ND
2014-03-12L4947427-60.140 ppb
2014-04-02L4974860-2ND
2014-04-02L4974854-2ND
2014-04-09L4983624-20.0300 ppb
2014-04-09L4983625-2ND
2014-04-09L3910885-30.250 ppb
2014-04-09L4498576-12.51 ppb
2014-05-07L5011070-2ND
2014-05-07L5011071-2ND
2014-05-07L4893067-10.270 ppb
2014-05-14L5016054-60.180 ppb
2014-05-15L5015734-42.44 ppb
2014-05-15L5015734-34.02 ppb
2014-05-15L5015734-21.86 ppb
2014-05-15L5015734-13.95 ppb
2014-05-21L4861514-20.0900 ppb
2014-05-21L4861514-40.0600 ppb
2014-05-21L4861514-60.130 ppb
2014-05-21L4861514-80.170 ppb
2014-06-04L5055995-2ND
2014-06-04L5055996-2ND
2014-06-04L5055995-6ND
2014-06-04L4974856-3ND
2014-06-18L5101766-2ND
2014-06-18L5101769-2ND
2014-06-18L5101766-4ND
2014-06-18L5101766-6ND
2014-06-25L5065611-4ND
2014-06-25L5065611-2ND
2014-06-25L5065611-6ND
2014-06-26L4800632-2ND
2014-07-02L5112472-2ND
2014-07-02L5112472-8ND
2014-07-02L5112472-4ND
2014-07-02L5112472-6ND
2014-07-02L5112472-10ND
2014-07-02L5112472-132.87 ppb
2014-07-16L5112474-4ND
2014-07-16L5112474-2ND
2014-07-16L5112474-6ND
2014-07-16L5112474-8ND
2014-08-06L5158340-2ND
2014-08-06L5158342-2ND
2014-08-06L5158340-4ND
2014-08-06L5158340-6ND
2014-08-15L5157771-42.00 ppb
2014-08-15L5157771-32.95 ppb
2014-08-15L5157771-21.47 ppb
2014-08-15L5157771-12.61 ppb
2014-08-20L5168226-2ND
2014-08-20L5168226-4ND
2014-08-20L5168226-6ND
2014-08-28L5197977-2ND
2014-09-10L5209131-2ND
2014-09-10L5209133-2ND
2014-09-10L5209131-4ND
2014-09-10L5209131-6ND
2014-09-24L5202847-2ND
2014-09-24L5202849-2ND
2014-09-24L5202847-4ND
2014-09-24L5202847-60.110 ppb
2014-09-24L5216776-30.230 ppb
2014-10-08L5240114-2ND
2014-10-08L5240117-2ND
2014-10-08L5240114-4ND
2014-10-08L5240114-60.120 ppb
2014-10-08L5240119-72.30 ppb
2014-10-22L5247599-2ND
2014-10-22L5247600-2ND
2014-10-22L5247599-4ND
2014-10-22L5247599-60.120 ppb
2014-11-05L5284696-2ND
2014-11-05L5284697-2ND
2014-11-05L5284696-4ND
2014-11-05L5284696-60.280 ppb
2014-11-14L5284466-40.990 ppb
2014-11-14L5284466-32.22 ppb
2014-11-14L5284466-21.79 ppb
2014-11-14L5284466-12.35 ppb
2014-11-14L5101770-24.50 ppb
2014-11-19L5292114-2ND
2014-11-19L5292115-2ND
2014-11-19L5292114-4ND
2014-11-19L5292114-60.150 ppb
2014-12-03L5320700-2ND
2014-12-03L5320701-2ND
2014-12-03L5320700-40.120 ppb
2014-12-03L5320700-60.240 ppb
2014-12-17L5328165-2ND
2014-12-17L5328166-2ND
2014-12-17L5328165-4ND
2014-12-17L5328165-60.280 ppb
2015-01-07L5364521-2ND
2015-01-07L5364557-2ND
2015-01-07L5364521-4ND
2015-01-07L5364521-60.150 ppb
2015-01-07L5101772-1ND
2015-01-21L5372236-2ND
2015-01-21L5372236-8ND
2015-01-21L5372236-4ND
2015-01-21L5372236-60.540 ppb
2015-01-21L4974849-14.21 ppb
2015-02-04L5406333-2ND
2015-02-04L5406367-2ND
2015-02-04L5406333-4ND
2015-02-04L5406333-60.130 ppb
2015-02-13L5406112-42.19 ppb
2015-02-13L5406112-32.28 ppb
2015-02-13L5406112-21.61 ppb
2015-02-13L5406112-12.27 ppb
2015-02-18L5415948-2ND
2015-02-18L5415948-40.0300 ppb
2015-02-18L5415948-60.0900 ppb
2015-03-04L5450243-2ND
2015-03-04L5450243-4ND
2015-03-04L5450243-60.290 ppb
2015-03-18L5458177-2ND
2015-03-18L5458177-4ND
2015-03-18L5458177-60.310 ppb
2015-04-01L5489111-2ND
2015-04-01L5489174-2ND
2015-04-01L5489111-4ND
2015-04-01L5489111-60.300 ppb
2015-04-15L5497563-2ND
2015-04-15L5497581-2ND
2015-04-15L5497563-4ND
2015-04-15L5497563-60.280 ppb
2015-04-15L5489175-3ND
2015-05-06L5547742-2ND
2015-05-06L5547759-20.130 ppb
2015-05-06L5547742-4ND
2015-05-06L5547742-60.1000 ppb
2015-05-06L5576820-3ND
2015-05-15L5537620-41.66 ppb
2015-05-15L5537620-31.91 ppb
2015-05-15L5537620-21.02 ppb
2015-05-15L5537620-12.03 ppb
2015-05-20L5352907-2ND
2015-05-20L5352907-8ND
2015-05-20L5352907-4ND
2015-05-20L5352907-60.120 ppb
2015-06-03L5586596-2ND
2015-06-03L5586632-20.170 ppb
2015-06-03L5586596-4ND
2015-06-03L5586596-60.140 ppb
2015-06-03L5586596-8ND
2015-06-03L5586596-112.21 ppb
2015-06-17L5595492-2ND
2015-06-17L5595511-2ND
2015-06-17L5595492-4ND
2015-06-17L5595492-60.480 ppb
2015-07-08L5652152-2ND
2015-07-08L5652173-2ND
2015-07-08L5652152-4ND
2015-07-08L5652152-60.0800 ppb
2015-07-24L5724309-2ND
2015-07-24L5724309-4ND
2015-07-24L5724309-6ND
2015-07-24L5724309-80.110 ppb
2015-08-12L5707284-2ND
2015-08-12L5707322-2ND
2015-08-12L5707284-4ND
2015-08-12L5707284-60.310 ppb
2015-08-14L5706749-42.11 ppb
2015-08-14L5706749-32.93 ppb
2015-08-14L5706749-21.69 ppb
2015-08-14L5706749-12.93 ppb
2015-08-26L5718591-2ND
2015-08-26L5718611-21.13 ppb
2015-08-26L5718591-4ND
2015-08-26L5718591-60.110 ppb
2015-09-09L5760285-2ND
2015-09-09L5760328-2ND
2015-09-09L5760285-4ND
2015-09-09L5760285-60.120 ppb
2015-09-23L5769948-2ND
2015-09-23L5769968-2ND
2015-09-23L5769948-4ND
2015-09-23L5769948-60.120 ppb
2015-10-07L5817658-2ND
2015-10-07L5817693-2ND
2015-10-07L5817658-4ND
2015-10-07L5817658-60.110 ppb
2015-10-21L5827923-2ND
2015-10-21L5808048-2ND
2015-10-21L5827923-4ND
2015-10-21L5827923-60.110 ppb
2015-11-04L5861335-2ND
2015-11-04L5861373-2ND
2015-11-04L5861335-4ND
2015-11-04L5861335-6ND
2015-11-18L5861111-43.26 ppb
2015-11-18L5861111-32.55 ppb
2015-11-18L5861111-23.47 ppb
2015-11-18L5861111-12.58 ppb
2015-11-18L5352909-2ND
2015-11-18L5870878-2ND
2015-11-18L5352909-4ND
2015-11-18L5352909-60.0900 ppb
2015-12-09L5908501-2ND
2015-12-09L5908537-2ND
2015-12-09L5908501-4ND
2015-12-09L5908501-60.130 ppb
2015-12-09L5908501-10.210 ppb
2015-12-09L5908537-1ND
2015-12-09L5908501-30.0900 ppb
2015-12-09L5908501-50.300 ppb
2015-12-23L5914288-2ND
2015-12-23L5914307-20.240 ppb
2015-12-23L5914288-4ND
2015-12-23L5914288-6ND
2016-01-06L5966583-2ND
2016-01-06L5966649-2ND
2016-01-06L5966583-4ND
2016-01-06L5966583-6ND
2016-01-20L5974155-2ND
2016-01-20L5974175-2ND
2016-01-20L5974155-4ND
2016-01-20L5974155-6ND
2016-01-20L5966584-52.21 ppb
2016-02-03L6015326-2ND
2016-02-03L6015362-2ND
2016-02-03L6015326-4ND
2016-02-03L6015326-60.0900 ppb
2016-02-16L6015107-41.70 ppb
2016-02-16L6015107-33.70 ppb
2016-02-16L6015107-22.10 ppb
2016-02-16L6015107-13.60 ppb
2016-02-17L6024321-2ND
2016-02-17L6024338-2ND
2016-02-17L6024321-4ND
2016-02-17L6024321-6ND
2016-03-02L6065292-2ND
2016-03-02L6065331-2ND
2016-03-02L6065292-4ND
2016-03-02L6065292-6ND
2016-04-06L6125450-2ND
2016-04-06L6125450-4ND
2016-04-06L6125450-60.1000 ppb
2016-04-13L6125516-2ND
2016-05-16L6176703-42.80 ppb
2016-05-16L6176703-34.80 ppb
2016-05-16L6176703-21.60 ppb
2016-05-16L6176703-16.80 ppb
2016-07-06L6313227-2ND
2016-07-06L6313308-2ND
2016-07-06L6313227-4ND
2016-07-06L6313227-60.200 ppb
2016-08-15L6366380-41.60 ppb
2016-08-15L6366380-34.40 ppb
2016-08-15L6366380-22.50 ppb
2016-08-16L6366380-13.00 ppb
2016-10-12L6475455-2ND
2016-10-12L6475485-2ND
2016-10-12L6475455-4ND
2016-11-15L6514042-42.50 ppb
2016-11-15L6514042-33.00 ppb
2016-11-15L6514042-22.30 ppb
2016-11-15L6514042-12.80 ppb
2016-12-21L6605364-2ND
2017-01-11L6603897-2ND
2017-01-11L6597137-2ND
2017-01-11L6603897-4ND
2017-01-11L6597137-55.80 ppb
2017-02-16L6639588-41.20 ppb
2017-02-16L6639588-11.70 ppb
2017-02-17L6639588-61.60 ppb
2017-02-17L6639588-50.700 ppb
2017-03-21L6581801-2ND
2017-04-20L6718593-2ND
2017-04-20L6718593-4ND
2017-04-20L6718593-6ND
2017-04-26L6718833-20.200 ppb
2017-04-26L6718833-7ND
2017-04-26L6718833-42.40 ppb
2017-05-16L6759923-42.00 ppb
2017-05-16L6759923-32.20 ppb
2017-05-16L6759923-23.00 ppb
2017-05-16L6759923-12.10 ppb
2017-05-16L6805913-2ND
2017-07-12L6853457-8ND
2017-07-12L6853457-2ND
2017-07-12L6853457-4ND
2017-07-12L6853457-6ND
2017-08-15L6912402-41.10 ppb
2017-08-15L6912402-31.70 ppb
2017-08-15L6912402-22.20 ppb
2017-08-15L6912402-11.60 ppb
2017-10-11L6949155-2ND
2017-10-11L6955277-2ND
2017-10-11L6949155-4ND
2017-10-11L6955277-40.1000 ppb
2017-11-15L6961776-41.10 ppb
2017-11-15L6961776-31.60 ppb
2017-11-15L6961776-24.30 ppb
2017-11-15L6961776-11.60 ppb
2018-01-173859238ND
2018-01-173859242ND
2018-01-173859236ND
2018-01-173859240ND
2018-01-1738592333.20 ppb
2018-01-1738592321.60 ppb
2018-02-153802150741.20 ppb
2018-02-153802150722.00 ppb
2018-02-153802150703.30 ppb
2018-02-153802150682.10 ppb
2018-04-11380411231ND
2018-04-11380411235ND
2018-04-11380411237ND
2018-04-11380411233ND
2018-05-163805160731.70 ppb
2018-05-163805160792.30 ppb
2018-05-163805160772.00 ppb
2018-05-163805160752.10 ppb
2018-07-12380712232.2ND
2018-07-12380712231.2ND
2018-07-12380712233.2ND
2018-07-12380712241.2ND
2018-08-153808157221.40 ppb
2018-08-153808157202.00 ppb
2018-08-153808157182.00 ppb
2018-08-153808157162.20 ppb
2018-10-09381009715.1ND
2018-10-09381009714.1ND
2018-10-09381009709.1ND
2018-10-09381009713.1ND
2018-11-15381115711.11.10 ppb
2018-11-15381115713.11.70 ppb
2018-11-15381115714.11.80 ppb
2018-11-15381115712.11.50 ppb
2019-01-16390116753.2ND
2019-01-16390116754.2ND
2019-01-16390116751.2ND
2019-01-16390116752.2ND
2019-01-16390116762.24.60 ppb
2019-01-16390116765ND
2019-02-14390214705.12.20 ppb
2019-02-14390214704.11.60 ppb
2019-02-14390214703.12.10 ppb
2019-02-14390214702.11.60 ppb
2019-04-09390409733.2ND
2019-04-09390409734.20.800 ppb
2019-04-09390409735.2ND
2019-04-09390409732.2ND
2019-05-16390516720.12.00 ppb
2019-05-16390516719.12.10 ppb
2019-05-16390516718.13.80 ppb
2019-05-16390516721.12.10 ppb
2019-07-19390719720.2ND
2019-07-19390719724.2ND
2019-07-19390719725.2ND
2019-07-19390719726.2ND
2019-08-14390814709.11.000 ppb
2019-08-14390814708.12.20 ppb
2019-08-14390814707.16.10 ppb
2019-08-14390814710.12.30 ppb
2019-10-22391022708.1ND
2019-10-22391022709.1ND
2019-10-22391022710.1ND
2019-10-22391022711.1ND
2019-11-13391113700.12.60 ppb
2019-11-13391113702.12.10 ppb
2019-11-13391113703.12.00 ppb
2019-11-13391113701.12.20 ppb