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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

East Valley Water District

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

392

Samples

0

Samples exceeding legal limit (MCL)

245

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.32 ppb7854ND - 14.4 ppb
20155.98 ppb4522ND - 21.7 ppb
20165.71 ppb6227ND - 46.1 ppb
20171.39 ppb6127ND - 15.4 ppb
20185.35 ppb7764ND - 22.5 ppb
20194.68 ppb6951ND - 21.2 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-01-303761-601-08356.20 ppb
2014-01-303761-602-08203.50 ppb
2014-01-303761-603-07555.70 ppb
2014-01-303761-604-0810ND
2014-01-303761-605-08454.30 ppb
2014-01-303761-606-09004.10 ppb
2014-01-303761-607-09107.60 ppb
2014-01-303761-608-07456.10 ppb
2014-02-213761-036-0745ND
2014-02-273761-601-0815ND
2014-02-273761-602-0755ND
2014-02-273761-603-0900ND
2014-02-273761-604-07401.10 ppb
2014-02-273761-605-0825ND
2014-02-273761-607-08401.90 ppb
2014-02-273761-608-0810ND
2014-04-183761-002-0945ND
2014-05-223761-601-0942ND
2014-05-223761-602-0959ND
2014-05-223761-603-08351.10 ppb
2014-05-223761-604-1012ND
2014-05-223761-605-0932ND
2014-05-223761-606-0913ND
2014-05-223761-607-08572.10 ppb
2014-05-223761-608-08191.80 ppb
2014-07-153761-002-11558.60 ppb
2014-07-233761-028-1130ND
2014-07-313761-601-10068.00 ppb
2014-07-313761-602-09336.00 ppb
2014-07-313761-603-095310.1 ppb
2014-07-313761-604-0917ND
2014-07-313761-605-110510.00 ppb
2014-07-313761-606-11379.50 ppb
2014-07-313761-607-1054ND
2014-07-313761-608-11244.70 ppb
2014-08-063761-002-10356.10 ppb
2014-08-223761-601-08484.70 ppb
2014-08-223761-602-080113.6 ppb
2014-08-223761-603-09088.20 ppb
2014-08-223761-604-0745ND
2014-08-223761-605-08595.10 ppb
2014-08-223761-606-092213.5 ppb
2014-08-223761-607-0958ND
2014-08-223761-608-08365.60 ppb
2014-09-033761-002-101514.4 ppb
2014-09-193761-601-08426.90 ppb
2014-09-193761-602-074910.4 ppb
2014-09-193761-603-08528.50 ppb
2014-09-193761-604-0733ND
2014-09-193761-605-082911.8 ppb
2014-09-193761-606-081510.9 ppb
2014-09-193761-607-0917ND
2014-09-193761-608-08008.60 ppb
2014-10-073761-002-11252.10 ppb
2014-10-173761-601-07588.30 ppb
2014-10-173761-602-07303.80 ppb
2014-10-173761-603-08218.20 ppb
2014-10-173761-604-07131.10 ppb
2014-10-173761-605-08128.00 ppb
2014-10-173761-606-08538.50 ppb
2014-10-173761-607-08406.40 ppb
2014-10-173761-608-07497.40 ppb
2014-11-203761-601-10047.50 ppb
2014-11-203761-602-09131.90 ppb
2014-11-203761-603-09244.00 ppb
2014-11-203761-604-0845ND
2014-11-203761-605-09407.40 ppb
2014-11-203761-606-10197.50 ppb
2014-11-203761-608-09547.20 ppb
2014-12-023761-002-09407.70 ppb
2014-12-153761-601-10291.20 ppb
2014-12-153761-602-10091.10 ppb
2014-12-153761-603-1046ND
2014-12-153761-604-09521.10 ppb
2014-12-153761-605-1039ND
2014-12-153761-606-1055ND
2014-12-153761-607-11082.60 ppb
2014-12-153761-608-10203.00 ppb
2015-01-063761-002-1000ND
2015-01-223761-601-0935ND
2015-01-223761-602-0844ND
2015-01-223761-603-0853ND
2015-01-223761-604-0828ND
2015-01-223761-605-0924ND
2015-01-223761-606-1017ND
2015-01-223761-607-1039ND
2015-01-223761-608-09081.10 ppb
2015-02-033761-002-1000ND
2015-03-173761-002-0930ND
2015-03-243761-036-0745ND
2015-04-073761-002-1230ND
2015-04-163761-601-1100ND
2015-04-163761-602-1015ND
2015-04-163761-603-1027ND
2015-04-163761-604-0950ND
2015-04-163761-605-1041ND
2015-04-163761-606-1112ND
2015-04-163761-607-1126ND
2015-04-163761-608-1052ND
2015-05-053761-002-09307.30 ppb
2015-06-023761-002-09357.60 ppb
2015-07-023761-601-080420.0 ppb
2015-07-023761-602-074416.3 ppb
2015-07-023761-603-082215.7 ppb
2015-07-023761-604-0733ND
2015-07-023761-605-081416.1 ppb
2015-07-023761-606-101016.9 ppb
2015-07-023761-607-084019.4 ppb
2015-07-023761-608-075519.1 ppb
2015-07-213761-002-103516.2 ppb
2015-08-043761-002-093519.4 ppb
2015-09-013761-002-093519.1 ppb
2015-10-063761-002-101021.7 ppb
2015-11-103761-002-100514.4 ppb
2015-12-103761-601-08175.90 ppb
2015-12-103761-602-0749ND
2015-12-103761-603-0803ND
2015-12-103761-604-07322.20 ppb
2015-12-103761-605-08297.10 ppb
2015-12-103761-606-11153.80 ppb
2015-12-103761-607-085912.1 ppb
2015-12-103761-608-08415.10 ppb
2015-12-153761-002-08152.80 ppb
2016-01-053761-036-1003ND
2016-01-213761-002-1045ND
2016-01-213761-601-10152.90 ppb
2016-01-213761-602-09031.30 ppb
2016-01-213761-603-09531.20 ppb
2016-01-213761-604-0845ND
2016-01-213761-605-1003ND
2016-01-213761-606-1056ND
2016-01-213761-607-11206.10 ppb
2016-01-213761-608-10232.60 ppb
2016-02-163761-002-0845ND
2016-03-013761-015-0744ND
2016-03-013761-016-0829ND
2016-03-013761-017-1000ND
2016-03-013761-020-0924ND
2016-03-013761-021-0915ND
2016-03-013761-024-0855ND
2016-03-013761-031-0841ND
2016-03-013761-032-0806ND
2016-03-013761-033-0753ND
2016-03-013761-053-0820ND
2016-03-023761-039-0821ND
2016-03-023761-042-0747ND
2016-03-023761-046-0811ND
2016-03-023761-055-0913ND
2016-03-033761-019-0823ND
2016-03-033761-023-0900ND
2016-03-033761-047-0505ND
2016-03-093761-002-1130ND
2016-04-123761-002-0907ND
2016-04-143761-601-0948ND
2016-04-143761-602-0856ND
2016-04-143761-603-0905ND
2016-04-143761-604-0845ND
2016-04-143761-605-0916ND
2016-04-143761-606-1000ND
2016-04-143761-607-1111ND
2016-04-143761-608-0927ND
2016-05-103761-002-09451.30 ppb
2016-06-143761-002-102513.8 ppb
2016-07-123761-002-08503.30 ppb
2016-07-213761-601-095514.1 ppb
2016-07-213761-602-09103.80 ppb
2016-07-213761-603-092012.0 ppb
2016-07-213761-604-0900ND
2016-07-213761-605-093511.2 ppb
2016-07-213761-606-1010ND
2016-07-213761-607-10209.40 ppb
2016-07-213761-608-094513.0 ppb
2016-08-093761-002-091010.1 ppb
2016-09-133761-002-11004.10 ppb
2016-10-113761-002-111513.2 ppb
2016-11-083761-002-093017.3 ppb
2016-11-173761-601-090631.6 ppb
2016-11-173761-602-082810.00 ppb
2016-11-173761-603-100027.6 ppb
2016-11-173761-604-08133.60 ppb
2016-11-173761-605-094627.0 ppb
2016-11-173761-606-091825.8 ppb
2016-11-173761-607-102546.1 ppb
2016-11-173761-608-085633.9 ppb
2016-12-133761-002-10157.70 ppb
2017-01-053761-036-0820ND
2017-01-103761-002-09302.20 ppb
2017-02-073761-002-0910ND
2017-02-243761-601-0940ND
2017-02-243761-602-09002.90 ppb
2017-02-243761-603-09156.40 ppb
2017-02-243761-604-08456.90 ppb
2017-02-243761-605-09252.10 ppb
2017-02-243761-606-10201.80 ppb
2017-02-243761-607-100515.4 ppb
2017-02-243761-608-09502.90 ppb
2017-03-143761-002-1025ND
2017-04-113761-002-0935ND
2017-05-093761-002-0920ND
2017-05-123761-601-11433.70 ppb
2017-05-123761-602-1023ND
2017-05-123761-603-10571.20 ppb
2017-05-123761-604-10133.00 ppb
2017-05-123761-605-11112.20 ppb
2017-05-123761-606-1222ND
2017-05-123761-607-12432.10 ppb
2017-05-123761-608-11273.90 ppb
2017-07-113761-002-1010ND
2017-08-093761-002-0940ND
2017-08-243761-601-0848ND
2017-08-243761-602-08281.60 ppb
2017-08-243761-603-0838ND
2017-08-243761-604-08173.80 ppb
2017-08-243761-605-0908ND
2017-08-243761-606-0920ND
2017-08-243761-607-09311.50 ppb
2017-08-243761-608-0858ND
2017-09-123761-002-0945ND
2017-10-173761-002-0905ND
2017-10-193761-601-0845ND
2017-10-193761-602-0815ND
2017-10-193761-603-0825ND
2017-10-193761-604-08001.80 ppb
2017-10-193761-605-0835ND
2017-10-193761-606-0915ND
2017-10-193761-607-09301.60 ppb
2017-10-193761-608-0900ND
2017-11-073761-601-1043ND
2017-11-073761-602-1053ND
2017-11-073761-603-1013ND
2017-11-073761-604-11033.10 ppb
2017-11-073761-605-10231.20 ppb
2017-11-073761-606-0920ND
2017-11-073761-607-08501.20 ppb
2017-11-073761-608-1033ND
2017-11-143761-002-0925ND
2017-12-053761-028-0850ND
2017-12-123761-002-0840ND
2017-12-203761-601-09422.70 ppb
2017-12-203761-602-0912ND
2017-12-203761-603-0919ND
2017-12-203761-604-09162.50 ppb
2017-12-203761-605-09272.50 ppb
2017-12-203761-606-0955ND
2017-12-203761-607-10151.80 ppb
2017-12-203761-608-09352.60 ppb
2018-01-053761-036-0752ND
2018-01-093761-002-0717ND
2018-01-113761-601-0938ND
2018-01-113761-602-08451.000 ppb
2018-01-113761-603-08551.50 ppb
2018-01-113761-604-08334.70 ppb
2018-01-113761-605-0910ND
2018-01-113761-606-0954ND
2018-01-113761-607-1016ND
2018-01-113761-608-09221.60 ppb
2018-02-133761-002-09153.30 ppb
2018-02-203761-601-09505.20 ppb
2018-02-203761-602-10207.60 ppb
2018-02-203761-603-10107.10 ppb
2018-02-203761-604-10503.00 ppb
2018-02-203761-605-09206.10 ppb
2018-02-203761-606-08556.90 ppb
2018-02-203761-607-09055.80 ppb
2018-02-203761-608-10005.10 ppb
2018-03-143761-002-09456.30 ppb
2018-04-103761-002-0910ND
2018-04-303761-601-09451.60 ppb
2018-04-303761-602-08051.10 ppb
2018-04-303761-603-11258.00 ppb
2018-04-303761-604-07453.80 ppb
2018-04-303761-605-11057.80 ppb
2018-04-303761-606-09251.90 ppb
2018-04-303761-607-09004.30 ppb
2018-04-303761-608-10105.00 ppb
2018-05-153761-002-07453.20 ppb
2018-05-303761-601-10081.50 ppb
2018-05-303761-602-1101ND
2018-05-303761-603-09371.60 ppb
2018-05-303761-604-07411.80 ppb
2018-05-303761-605-09471.60 ppb
2018-05-303761-606-0915ND
2018-05-303761-607-08412.30 ppb
2018-05-303761-608-09571.50 ppb
2018-06-123761-002-0915ND
2018-07-103761-002-0930ND
2018-08-093761-601-11423.20 ppb
2018-08-093761-602-1101ND
2018-08-093761-603-11113.40 ppb
2018-08-093761-604-10502.50 ppb
2018-08-093761-605-11224.70 ppb
2018-08-093761-606-1152ND
2018-08-093761-607-12055.10 ppb
2018-08-093761-608-11324.20 ppb
2018-08-143761-002-112310.00 ppb
2018-09-063761-601-07407.30 ppb
2018-09-063761-602-08051.40 ppb
2018-09-063761-603-08551.30 ppb
2018-09-063761-604-08151.90 ppb
2018-09-063761-605-08451.10 ppb
2018-09-063761-606-08258.10 ppb
2018-09-063761-607-08357.00 ppb
2018-09-063761-608-07508.70 ppb
2018-09-113761-002-09407.00 ppb
2018-10-093761-002-102014.8 ppb
2018-10-113761-601-100516.6 ppb
2018-10-113761-602-09246.10 ppb
2018-10-113761-603-093414.7 ppb
2018-10-113761-604-08551.50 ppb
2018-10-113761-605-094610.3 ppb
2018-10-113761-606-10156.40 ppb
2018-10-113761-607-103318.4 ppb
2018-10-113761-608-095615.9 ppb
2018-11-133761-002-09254.90 ppb
2018-11-283761-601-094617.7 ppb
2018-11-283761-602-10277.70 ppb
2018-11-283761-603-093619.3 ppb
2018-11-283761-604-08042.40 ppb
2018-11-283761-605-092017.2 ppb
2018-11-283761-606-08553.10 ppb
2018-11-283761-607-084021.1 ppb
2018-11-283761-608-091022.5 ppb
2018-12-113761-002-11152.30 ppb
2019-01-033761-036-0830ND
2019-01-163761-002-08452.20 ppb
2019-01-233761-601-093519.7 ppb
2019-01-233761-602-081514.5 ppb
2019-01-233761-603-083518.3 ppb
2019-01-233761-604-10206.30 ppb
2019-01-233761-605-095018.2 ppb
2019-01-233761-606-084516.9 ppb
2019-01-233761-607-090016.6 ppb
2019-01-233761-608-094021.2 ppb
2019-02-073761-601-09251.80 ppb
2019-02-073761-602-10051.30 ppb
2019-02-073761-603-09451.80 ppb
2019-02-073761-604-07452.60 ppb
2019-02-073761-605-094015.8 ppb
2019-02-073761-606-091012.7 ppb
2019-02-073761-607-083513.2 ppb
2019-02-073761-608-09308.40 ppb
2019-02-123761-002-08551.50 ppb
2019-03-053761-017-0807ND
2019-03-053761-020-0818ND
2019-03-053761-032-0750ND
2019-03-053761-033-0735ND
2019-03-123761-021-0808ND
2019-03-123761-023-0754ND
2019-03-123761-024-0820ND
2019-03-123761-042-0729ND
2019-03-123761-047-0753ND
2019-03-193761-015-0734ND
2019-03-193761-019-0825ND
2019-03-193761-031-0759ND
2019-03-193761-053-0751ND
2019-03-263761-039-0955ND
2019-03-263761-055-1014ND
2019-04-163761-002-0916ND
2019-05-073761-601-09352.80 ppb
2019-05-073761-602-10191.60 ppb
2019-05-073761-603-10082.10 ppb
2019-05-073761-604-10292.20 ppb
2019-05-073761-605-09557.70 ppb
2019-05-073761-606-09222.80 ppb
2019-05-073761-607-09053.60 ppb
2019-05-073761-608-09456.20 ppb
2019-05-143761-002-10477.00 ppb
2019-06-113761-002-07244.20 ppb
2019-06-213761-046-0810ND
2019-07-033761-002-10351.20 ppb
2019-08-063761-002-09161.10 ppb
2019-08-083761-601-09311.80 ppb
2019-08-083761-602-10201.30 ppb
2019-08-083761-603-09531.20 ppb
2019-08-083761-604-10092.70 ppb
2019-08-083761-605-09441.30 ppb
2019-08-083761-606-10421.10 ppb
2019-08-083761-607-09051.80 ppb
2019-08-083761-608-09211.90 ppb
2019-09-103761-002-09344.30 ppb
2019-10-083761-002-09451.70 ppb
2019-11-053761-002-09374.10 ppb
2019-11-083761-601-10199.90 ppb
2019-11-083761-602-09595.10 ppb
2019-11-083761-603-10477.00 ppb
2019-11-083761-604-09411.20 ppb
2019-11-083761-605-10347.80 ppb
2019-11-083761-606-11076.60 ppb
2019-11-083761-607-09158.60 ppb
2019-11-083761-608-10104.10 ppb
2019-11-123761-002-09008.30 ppb
2019-12-173761-002-10295.30 ppb