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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

City of Alexandria

NOTE: City of Alexandria purchases water from Fairfax County Water Authority which is required to test for chloroform. Sample information shown below was taken by Fairfax County 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.

 

356

Samples

0

Samples exceeding legal limit (MCL)

356

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201216.3 ppb36364.30 ppb - 45.4 ppb
201313.0 ppb889.10 ppb - 18.0 ppb
201410.7 ppb30303.20 ppb - 29.1 ppb
20159.39 ppb16167.10 ppb - 13.6 ppb
201611.6 ppb32322.90 ppb - 35.1 ppb
201712.4 ppb32322.50 ppb - 39.0 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

NOTE: City of Alexandria purchases water from Fairfax County Water Authority which is required to test for chloroform. Sample information shown below was taken by Fairfax County Water Authority.

Date Lab ID Result
2012-05-15FW12043002-03_TH45.4 ppb
2012-05-15FW12043002-11_TH37.2 ppb
2012-05-15FW12043002-08_TH31.9 ppb
2012-05-15FW12043002-02_TH31.1 ppb
2012-05-15FW12043002-10_TH30.2 ppb
2012-05-15FW12043002-09_TH28.5 ppb
2012-05-15FW12043002-05_TH28.3 ppb
2012-05-15FW12043002-01_TH27.6 ppb
2012-05-15FW12043002-06_TH22.5 ppb
2012-05-15FW12043002-07_TH20.4 ppb
2012-05-15FW12043002-14_TH19.4 ppb
2012-05-15FW12043002-04_TH10.6 ppb
2012-08-14FW12080120-04_TH13.2 ppb
2012-08-14FW12080120-11_TH13.1 ppb
2012-08-14FW12080120-03_TH13.0 ppb
2012-08-14FW12080120-14_TH12.8 ppb
2012-08-14FW12080120-10_TH19.7 ppb
2012-08-14FW12080120-08_TH17.9 ppb
2012-08-14FW12080120-05_TH16.9 ppb
2012-08-14FW12080120-06_TH15.8 ppb
2012-08-14FW12080120-07_TH13.7 ppb
2012-08-14FW12080120-09_TH11.2 ppb
2012-08-14FW12080120-02_TH11.1 ppb
2012-08-14FW12080120-01_TH10.7 ppb
2012-11-15FW12102514-16_TH11.2 ppb
2012-11-15FW12102514-08_TH10.5 ppb
2012-11-15FW12102514-14_TH10.4 ppb
2012-11-15FW12102514-13_TH9.96 ppb
2012-11-15FW12102514-15_TH7.39 ppb
2012-11-15FW12102514-07_TH5.42 ppb
2012-11-15FW12102514-09_TH5.38 ppb
2012-11-15FW12102514-11_TH5.24 ppb
2012-11-15FW12102514-10_TH5.06 ppb
2012-11-15FW12102514-04_TH4.56 ppb
2012-11-15FW12102514-05_TH4.35 ppb
2012-11-15FW12102514-06_TH4.30 ppb
2013-02-21FW13012811-13_TH8.85 ppb
2013-02-21FW13012811-16_TH8.68 ppb
2013-02-21FW13012811-14_TH8.12 ppb
2013-02-21FW13012811-15_TH7.78 ppb
2013-02-21FW13012811-08_TH7.06 ppb
2013-02-21FW13012811-05_TH4.20 ppb
2013-02-21FW13012811-10_TH3.84 ppb
2013-02-21FW13012811-09_TH3.62 ppb
2013-02-21FW13012811-07_TH3.57 ppb
2013-02-21FW13012811-06_TH3.38 ppb
2013-02-21FW13012811-11_TH3.28 ppb
2013-02-21FW13012811-04_TH3.23 ppb
2013-05-16FW13042632-13_TH53.7 ppb
2013-05-16FW13042632-09_TH44.6 ppb
2013-05-16FW13042632-14_TH43.8 ppb
2013-05-16FW13042632-10_TH42.9 ppb
2013-05-16FW13042632-16_TH37.8 ppb
2013-05-16FW13042632-05_TH36.8 ppb
2013-05-16FW13042632-15_TH32.4 ppb
2013-05-16FW13042632-08_TH28.1 ppb
2013-05-16FW13042632-06_TH23.8 ppb
2013-05-16FW13042632-07_TH19.4 ppb
2013-05-16FW13042632-11_TH15.1 ppb
2013-05-16FW13042632-04_TH15.0 ppb
2013-08-15FW13073116-07_TH21.6 ppb
2013-08-15FW13073116-13_TH18.9 ppb
2013-08-15FW13073116-14_TH17.0 ppb
2013-08-15FW13073116-09_TH16.8 ppb
2013-08-15FW13073116-16_TH16.4 ppb
2013-08-15FW13073116-15_TH16.3 ppb
2013-08-15FW13073116-06_TH16.2 ppb
2013-08-15FW13073116-05_TH16.0 ppb
2013-08-15FW13073116-10_TH15.9 ppb
2013-08-15FW13073116-08_TH15.7 ppb
2013-08-15FW13073116-04_TH11.0 ppb
2013-08-15FW13073116-11_TH9.17 ppb
2013-11-21FW13102431-03_TH11.6 ppb
2013-11-21FW13102431-04_TH10.2 ppb
2013-11-21FW13102431-06_TH10.1 ppb
2013-11-21FW13102430-02_TH9.58 ppb
2013-11-21FW13102431-05_TH8.51 ppb
2013-11-21FW13102429-06_TH7.01 ppb
2013-11-21FW13102430-03_TH5.69 ppb
2013-11-21FW13102429-04_TH5.56 ppb
2013-11-21FW13102429-05_TH5.26 ppb
2013-11-21FW13102430-04_TH5.10 ppb
2013-11-21FW13102429-03_TH4.60 ppb
2013-11-21FW13102430-05_TH4.58 ppb
2014-02-20FW14013105-03_TH17.2 ppb
2014-02-20FW14013105-06_TH14.0 ppb
2014-02-20FW14013105-05_TH13.7 ppb
2014-02-20FW14013105-04_TH12.0 ppb
2014-02-20FW14013104-05_TH4.49 ppb
2014-02-20FW14013104-04_TH4.30 ppb
2014-02-20FW14013108-03_TH3.59 ppb
2014-02-20FW14013108-06_TH3.30 ppb
2014-02-20FW14013108-04_TH3.19 ppb
2014-02-20FW14013106-02_TH3.12 ppb
2014-02-20FW14013108-05_TH3.07 ppb
2014-02-20FW14013104-03_TH3.00 ppb
2014-02-20FW14013107-06_TH2.66 ppb
2014-02-20FW14013106-03_TH2.53 ppb
2014-02-20FW14013104-02_TH2.16 ppb
2014-02-20FW14013106-04_TH2.16 ppb
2014-02-20FW14013106-05_TH2.04 ppb
2014-02-20FW14013107-03_TH2.02 ppb
2014-02-20FW14013107-04_TH1.98 ppb
2014-02-20FW14013107-05_TH1.98 ppb
2014-05-15FW14042361-03_TH57.4 ppb
2014-05-15FW14042361-04_TH35.6 ppb
2014-05-15FW14042361-06_TH35.5 ppb
2014-05-15FW14042362-03_TH32.4 ppb
2014-05-15FW14042360-04_TH30.9 ppb
2014-05-15FW14042403-05_TH30.7 ppb
2014-05-15FW14042361-05_TH30.2 ppb
2014-05-15FW14042403-03_TH29.4 ppb
2014-05-15FW14042362-04_TH28.6 ppb
2014-05-15FW14042362-05_TH27.5 ppb
2014-05-15FW14042360-03_TH26.8 ppb
2014-05-15FW14042362-06_TH26.8 ppb
2014-05-15FW14042403-04_TH25.4 ppb
2014-05-15FW14042359-06_TH23.9 ppb
2014-05-15FW14042360-02_TH23.4 ppb
2014-05-15FW14042403-02_TH20.3 ppb
2014-05-15FW14042359-04_TH20.0 ppb
2014-05-15FW14042359-05_TH18.6 ppb
2014-05-15FW14042360-05_TH18.2 ppb
2014-05-15FW14042359-03_TH11.7 ppb
2014-08-19FW14072252-03_TH18.0 ppb
2014-08-19FW14072252-06_TH12.3 ppb
2014-08-19FW14072252-04_TH11.4 ppb
2014-08-19FW14072252-05_TH9.72 ppb
2014-08-19FW14072250-06_TH9.38 ppb
2014-08-19FW14072250-04_TH7.97 ppb
2014-08-19FW14072250-03_TH6.79 ppb
2014-08-19FW14072250-05_TH6.34 ppb
2014-08-20FW14072251-04_TH10.6 ppb
2014-08-20FW14072251-02_TH9.90 ppb
2014-08-20FW14072251-03_TH9.84 ppb
2014-08-20FW14072251-05_TH7.06 ppb
2014-08-21FW14072253-03_TH46.9 ppb
2014-08-21FW14072253-05_TH41.7 ppb
2014-08-21FW14072253-04_TH40.3 ppb
2014-08-21FW14072253-06_TH38.8 ppb
2014-08-21FW14072254-03_TH7.92 ppb
2014-08-21FW14072254-02_TH6.28 ppb
2014-08-21FW14072254-05_TH6.02 ppb
2014-08-21FW14072254-04_TH5.98 ppb
2014-11-20FW141022073-03_T12.7 ppb
2014-11-20FW141022070-03_T38.2 ppb
2014-11-20FW141022070-05_T23.5 ppb
2014-11-20FW141022070-06_T23.4 ppb
2014-11-20FW141022070-04_T22.0 ppb
2014-11-20FW141022073-06_T9.92 ppb
2014-11-20FW141022073-04_T8.93 ppb
2014-11-20FW141022073-05_T8.84 ppb
2014-11-20FW141022072-04_T8.31 ppb
2014-11-20FW141022069-03_T7.32 ppb
2014-11-20FW141022072-06_T7.16 ppb
2014-11-20FW141022071-03_T7.15 ppb
2014-11-20FW141022071-02_T6.38 ppb
2014-11-20FW141022071-04_T6.31 ppb
2014-11-20FW141022069-04_T5.08 ppb
2014-11-20FW141022072-05_T5.04 ppb
2014-11-20FW141022071-05_T4.98 ppb
2014-11-20FW141022069-02_T4.70 ppb
2014-11-20FW141022072-03_T4.69 ppb
2014-11-20FW141022069-05_T4.64 ppb
2015-02-1900125-FAIRFAX CO19.0 ppb
2015-02-1900125-FAIRFAX CO13.9 ppb
2015-02-1900125-FAIRFAX CO12.5 ppb
2015-02-1900125-FAIRFAX CO4.90 ppb
2015-02-1900125-FAIRFAX CO4.39 ppb
2015-02-1900125-FAIRFAX CO4.31 ppb
2015-02-1900125-FAIRFAX CO4.09 ppb
2015-02-1900125-FAIRFAX CO3.93 ppb
2015-02-1900125-FAIRFAX CO3.68 ppb
2015-02-1900125-FAIRFAX CO3.63 ppb
2015-02-1900125-FAIRFAX CO3.60 ppb
2015-02-1900125-FAIRFAX CO3.55 ppb
2015-02-1900125-FAIRFAX CO3.53 ppb
2015-02-1900125-FAIRFAX CO3.50 ppb
2015-02-2300125-FAIRFAX CO4.10 ppb
2015-02-2300125-FAIRFAX CO3.47 ppb
2015-05-2100125-FAIRFAX CO63.3 ppb
2015-05-2100125-FAIRFAX CO47.4 ppb
2015-05-2100125-FAIRFAX CO44.9 ppb
2015-05-2100125-FAIRFAX CO43.9 ppb
2015-05-2100125-FAIRFAX CO43.4 ppb
2015-05-2100125-FAIRFAX CO42.2 ppb
2015-05-2100125-FAIRFAX CO41.2 ppb
2015-05-2100125-FAIRFAX CO41.0 ppb
2015-05-2100125-FAIRFAX CO40.8 ppb
2015-05-2100125-FAIRFAX CO39.7 ppb
2015-05-2100125-FAIRFAX CO37.6 ppb
2015-05-2100125-FAIRFAX CO36.1 ppb
2015-05-2100125-FAIRFAX CO32.8 ppb
2015-05-2100125-FAIRFAX CO30.7 ppb
2015-05-2100125-FAIRFAX CO28.2 ppb
2015-05-2100125-FAIRFAX CO28.2 ppb
2015-08-2000125-FAIRFAX CO37.2 ppb
2015-08-2000125-FAIRFAX CO31.5 ppb
2015-08-2000125-FAIRFAX CO31.0 ppb
2015-08-2000125-FAIRFAX CO19.0 ppb
2015-08-2000125-FAIRFAX CO16.1 ppb
2015-08-2000125-FAIRFAX CO13.9 ppb
2015-08-2000125-FAIRFAX CO13.5 ppb
2015-08-2000125-FAIRFAX CO11.9 ppb
2015-08-2000125-FAIRFAX CO11.5 ppb
2015-08-2000125-FAIRFAX CO11.0 ppb
2015-08-2000125-FAIRFAX CO10.2 ppb
2015-08-2000125-FAIRFAX CO9.23 ppb
2015-08-2000125-FAIRFAX CO9.13 ppb
2015-08-2000125-FAIRFAX CO8.76 ppb
2015-08-2000125-FAIRFAX CO7.95 ppb
2015-08-2000125-FAIRFAX CO7.92 ppb
2015-11-2000125-FAIRFAX CO39.6 ppb
2015-11-2000125-FAIRFAX CO20.2 ppb
2015-11-2000125-FAIRFAX CO12.1 ppb
2015-11-2000125-FAIRFAX CO9.67 ppb
2015-11-2000125-FAIRFAX CO9.61 ppb
2015-11-2000125-FAIRFAX CO9.61 ppb
2015-11-2000125-FAIRFAX CO8.17 ppb
2015-11-2000125-FAIRFAX CO7.47 ppb
2015-11-2000125-FAIRFAX CO6.24 ppb
2015-11-2000125-FAIRFAX CO5.11 ppb
2015-11-2000125-FAIRFAX CO5.04 ppb
2015-11-2000125-FAIRFAX CO4.49 ppb
2015-11-2000125-FAIRFAX CO3.95 ppb
2015-11-2000125-FAIRFAX CO3.76 ppb
2015-11-2000125-FAIRFAX CO3.65 ppb
2015-11-2000125-FAIRFAX CO3.62 ppb
2016-02-18FW160107017-02_T33.8 ppb
2016-02-18FW160107017-06_T12.6 ppb
2016-02-18FW160107017-05_T12.5 ppb
2016-02-18FW160107020-05_T5.51 ppb
2016-02-18FW160107020-03_T5.49 ppb
2016-02-18FW160107020-04_T5.48 ppb
2016-02-18FW160107019-06_T4.61 ppb
2016-02-18FW160107019-04_T4.40 ppb
2016-02-18FW160107020-06_T3.91 ppb
2016-02-18FW160107019-05_T3.68 ppb
2016-02-18FW160107019-03_T3.22 ppb
2016-02-18FW160107018-05_T3.20 ppb
2016-02-18FW160107018-03_T3.05 ppb
2016-02-18FW160107019-02_T2.99 ppb
2016-02-18FW160107018-06_T2.85 ppb
2016-02-18FW160107018-04_T2.75 ppb
2016-05-19FW160422018-03_T63.9 ppb
2016-05-19FW160422020-02_T42.9 ppb
2016-05-19FW160422018-04_T36.0 ppb
2016-05-19FW160422019-05_T31.1 ppb
2016-05-19FW160422018-05_T30.2 ppb
2016-05-19FW160422019-04_T29.6 ppb
2016-05-19FW160422019-03_T28.3 ppb
2016-05-19FW160422019-02_T27.5 ppb
2016-05-19FW160422020-06_T26.7 ppb
2016-05-19FW160422020-05_T26.0 ppb
2016-05-19FW160422081-05_T25.8 ppb
2016-05-19FW160422018-06_T22.3 ppb
2016-05-19FW160422081-03_T20.4 ppb
2016-05-19FW160422019-06_T20.3 ppb
2016-05-19FW160422081-04_T12.6 ppb
2016-05-19FW160422081-06_T8.53 ppb
2016-08-16FW160725088-03_T15.8 ppb
2016-08-16FW160725088-04_T14.4 ppb
2016-08-16FW160725088-05_T14.1 ppb
2016-08-16FW160725088-06_T12.8 ppb
2016-08-17FW160725089-03_T15.6 ppb
2016-08-17FW160725089-06_T14.1 ppb
2016-08-17FW160725089-04_T13.6 ppb
2016-08-17FW160725089-05_T13.0 ppb
2016-08-18FW160725086-02_T50.3 ppb
2016-08-18FW160725086-06_T39.4 ppb
2016-08-18FW160725086-05_T36.3 ppb
2016-08-18FW160725087-03_T17.9 ppb
2016-08-18FW160725087-04_T17.0 ppb
2016-08-18FW160725087-02_T14.2 ppb
2016-08-18FW160725087-05_T13.8 ppb
2016-08-18FW160725087-06_T12.5 ppb
2016-11-17FW161018093-03_T12.1 ppb
2016-11-17FW161018093-06_T9.03 ppb
2016-11-17FW161018093-05_T8.91 ppb
2016-11-17FW161018093-04_T8.51 ppb
2016-11-17FW161018092-03_T8.36 ppb
2016-11-17FW161018091-04_T7.93 ppb
2016-11-17FW161018092-05_T7.66 ppb
2016-11-17FW161018091-03_T7.45 ppb
2016-11-17FW161018091-05_T7.29 ppb
2016-11-17FW161018088-02_T7.13 ppb
2016-11-17FW161018091-02_T6.76 ppb
2016-11-17FW161018088-06_T6.59 ppb
2016-11-17FW161018092-04_T6.36 ppb
2016-11-17FW161018088-05_T6.29 ppb
2016-11-17FW161018091-06_T6.23 ppb
2016-11-17FW161018092-06_T6.02 ppb
2017-02-15FW170126080-05_T3.50 ppb
2017-02-15FW170126080-03_T3.41 ppb
2017-02-15FW170126080-04_T3.07 ppb
2017-02-15FW170126080-06_T2.94 ppb
2017-02-16FW170126078-02_T11.2 ppb
2017-02-16FW170126078-05_T10.5 ppb
2017-02-16FW170126078-06_T9.46 ppb
2017-02-16FW170126081-03_T6.97 ppb
2017-02-16FW170126081-05_T6.33 ppb
2017-02-16FW170126081-04_T6.31 ppb
2017-02-16FW170126081-06_T5.90 ppb
2017-02-16FW170126079-06_T4.97 ppb
2017-02-16FW170126079-04_T4.00 ppb
2017-02-16FW170126079-05_T3.35 ppb
2017-02-16FW170126079-03_T3.16 ppb
2017-02-16FW170126079-02_T3.15 ppb
2017-05-18FW170426070-03_T70.9 ppb
2017-05-18FW170426069-04_T58.2 ppb
2017-05-18FW170426070-04_T54.3 ppb
2017-05-18FW170426069-06_T40.6 ppb
2017-05-18FW170426068-03_T39.6 ppb
2017-05-18FW170426069-05_T39.2 ppb
2017-05-18FW170426070-05_T38.7 ppb
2017-05-18FW170426069-03_T38.3 ppb
2017-05-18FW170426070-06_T37.5 ppb
2017-05-18FW170426068-05_T36.6 ppb
2017-05-18FW170426069-02_T35.2 ppb
2017-05-18FW170426071-02_T34.3 ppb
2017-05-18FW170426071-06_T34.2 ppb
2017-05-18FW170426068-04_T30.8 ppb
2017-05-18FW170426071-05_T29.4 ppb
2017-05-18FW170426068-06_T17.3 ppb
2017-08-17FW170710006-02_T58.7 ppb
2017-08-17FW170710006-06_T24.1 ppb
2017-08-17FW170710006-05_T19.1 ppb
2017-08-17FW170710009-03_T17.7 ppb
2017-08-17FW170710008-04_T16.8 ppb
2017-08-17FW170710007-03_T16.2 ppb
2017-08-17FW170710009-04_T14.9 ppb
2017-08-17FW170710008-02_T14.3 ppb
2017-08-17FW170710009-05_T14.3 ppb
2017-08-17FW170710009-06_T14.1 ppb
2017-08-17FW170710008-03_T13.8 ppb
2017-08-17FW170710008-06_T13.8 ppb
2017-08-17FW170710008-05_T13.2 ppb
2017-08-17FW170710007-05_T12.9 ppb
2017-08-17FW170710007-04_T11.3 ppb
2017-08-17FW170710007-06_T9.53 ppb
2017-11-15FW171025015-04_T9.59 ppb
2017-11-15FW171025015-05_T8.29 ppb
2017-11-15FW171025015-02_T8.25 ppb
2017-11-15FW171025015-03_T6.64 ppb
2017-11-15FW171025015-06_T6.37 ppb
2017-11-16FW171025014-02_T34.4 ppb
2017-11-16FW171025014-06_T27.0 ppb
2017-11-16FW171025014-05_T24.9 ppb
2017-11-16FW171025017-03_T12.4 ppb
2017-11-16FW171025017-06_T8.52 ppb
2017-11-16FW171025017-04_T8.44 ppb
2017-11-16FW171025017-05_T8.16 ppb
2017-11-16FW171025016-03_T6.96 ppb
2017-11-16FW171025016-05_T6.87 ppb
2017-11-16FW171025016-04_T4.70 ppb
2017-11-16FW171025016-06_T4.17 ppb