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EWG's Tap Water Database — 2021 UPDATE

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Perchlorate

Lincoln Avenue Water Company

Perchlorate, a component of rocket fuel, occurs both naturally and as a synthetic chemical. Ingested perchlorate interferes with thyroid function. Exposure to perchlorate during pregnancy and childhood can impair cognitive development. Read More.

According to the EPA, perchlorate likely contaminates the water of more than 16 million Americans. Perchlorate interferes with iodine uptake in the thyroid, which can result in reduced thyroid hormones and an impact on metabolism, physical development and cognitive development. Children and developing fetuses are the most at risk from perchlorate contamination.

Perchlorate is the only unregulated contaminant for which the EPA has attempted to set a federal drinking water standard since 1996. However, the agency has yet to propose a draft limit for this contaminant. Perchlorate in drinking water is regulated in Arizona, California, Massachusetts, New Jersey, New York and Texas. California set a public health goal of 1 part per billion for perchlorate in 2015.

Click here to read more about perchlorate.

MORE ABOUT THIS CONTAMINANT

 

484

Samples

0

Samples exceeding legal limit (MCL)

95

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND620ND
2015ND670ND
2016ND660ND
2017ND600ND
20186.21 ppb11852ND - 22.0 ppb
20194.08 ppb11143ND - 13.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1 ppb

The EWG Health Guideline of 1 ppb for perchlorate was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-073761-006-0935ND
2014-01-073761-024-0900ND
2014-01-143761-024-0830ND
2014-01-213761-024-0815ND
2014-01-283761-024-0900ND
2014-02-043761-006-0930ND
2014-02-043761-024-1045ND
2014-02-113761-024-0925ND
2014-02-183761-024-0910ND
2014-02-253761-024-0820ND
2014-03-043761-006-0945ND
2014-03-043761-024-0813ND
2014-03-143761-024-0845ND
2014-03-183761-024-0915ND
2014-03-253761-024-1005ND
2014-04-013761-006-0840ND
2014-04-013761-024-0925ND
2014-04-083761-024-1005ND
2014-04-153761-024-0833ND
2014-04-223761-024-0915ND
2014-04-293761-024-0915ND
2014-05-063761-006-1040ND
2014-05-063761-024-0920ND
2014-05-133761-024-0845ND
2014-05-203761-024-0855ND
2014-05-273761-024-0910ND
2014-06-033761-006-1000ND
2014-06-033761-024-0905ND
2014-06-103761-024-0950ND
2014-06-173761-024-0900ND
2014-06-243761-024-0915ND
2014-06-253761-024-1200ND
2014-06-263761-024-1150ND
2014-07-013761-006-0940ND
2014-07-013761-024-1015ND
2014-07-083761-024-0840ND
2014-07-153761-024-0855ND
2014-07-223761-024-0900ND
2014-07-293761-024-0950ND
2014-08-053761-006-1115ND
2014-08-053761-024-1105ND
2014-08-123761-024-0855ND
2014-08-193761-024-0935ND
2014-08-263761-024-0910ND
2014-09-023761-006-1040ND
2014-09-023761-024-1005ND
2014-09-093761-024-0915ND
2014-09-163761-024-0920ND
2014-09-233761-024-0905ND
2014-09-303761-024-0910ND
2014-10-073761-006-1040ND
2014-10-073761-024-0940ND
2014-10-143761-024-1030ND
2014-10-213761-024-0830ND
2014-10-283761-024-0905ND
2014-11-253761-024-0930ND
2014-12-023761-006-0940ND
2014-12-023761-024-0900ND
2014-12-093761-024-0920ND
2014-12-163761-024-0905ND
2014-12-233761-024-0920ND
2014-12-303761-024-0855ND
2015-01-063761-006-1030ND
2015-01-063761-024-0900ND
2015-01-133761-024-0840ND
2015-01-203761-024-0845ND
2015-01-273761-024-0930ND
2015-02-033761-006-0930ND
2015-02-033761-024-0900ND
2015-02-103761-024-0925ND
2015-02-173761-024-0935ND
2015-02-243761-024-0855ND
2015-03-033761-006-1120ND
2015-03-033761-024-0945ND
2015-03-103761-024-1040ND
2015-03-173761-024-0905ND
2015-03-183761-024-1050ND
2015-03-193761-024-1100ND
2015-03-243761-024-0850ND
2015-03-313761-024-0900ND
2015-04-073761-006-1135ND
2015-04-073761-024-0915ND
2015-04-143761-024-0928ND
2015-04-213761-024-0855ND
2015-04-283761-024-0855ND
2015-05-053761-006-1110ND
2015-05-053761-024-0930ND
2015-05-123761-024-0835ND
2015-05-193761-024-0917ND
2015-05-263761-024-0915ND
2015-06-023761-006-1005ND
2015-06-023761-024-0854ND
2015-06-093761-024-0915ND
2015-06-163761-024-0905ND
2015-06-233761-024-0925ND
2015-06-303761-024-0915ND
2015-07-073761-006-1125ND
2015-07-073761-024-1210ND
2015-07-143761-024-0950ND
2015-07-213761-024-1005ND
2015-07-283761-024-0945ND
2015-08-053761-006-1120ND
2015-08-053761-024-0940ND
2015-08-113761-024-0805ND
2015-08-183761-024-0845ND
2015-08-253761-024-0945ND
2015-09-013761-006-0926ND
2015-09-013761-024-0900ND
2015-09-083761-024-0835ND
2015-09-163761-024-0857ND
2015-09-223761-024-0925ND
2015-09-293761-024-0835ND
2015-10-063761-006-1030ND
2015-10-063761-024-0940ND
2015-10-133761-024-0825ND
2015-10-213761-024-1025ND
2015-10-273761-024-0910ND
2015-11-033761-006-1120ND
2015-11-033761-024-0915ND
2015-11-103761-024-0910ND
2015-11-173761-024-0855ND
2015-11-243761-024-0845ND
2015-12-013761-006-1040ND
2015-12-013761-024-0945ND
2015-12-083761-024-0835ND
2015-12-153761-024-1145ND
2015-12-233761-024-0940ND
2015-12-293761-024-0935ND
2015-12-313761-024-1035ND
2016-01-053761-006-1015ND
2016-01-053761-024-0902ND
2016-01-123761-024-0945ND
2016-01-193761-024-0920ND
2016-01-263761-024-0925ND
2016-02-023761-006-0845ND
2016-02-023761-024-0816ND
2016-02-093761-024-0905ND
2016-02-163761-024-0834ND
2016-02-233761-024-0935ND
2016-03-013761-006-1000ND
2016-03-013761-024-0910ND
2016-03-083761-024-0935ND
2016-03-153761-024-0905ND
2016-03-223761-024-0945ND
2016-03-293761-024-0920ND
2016-04-053761-006-0840ND
2016-04-053761-024-0834ND
2016-04-123761-024-1045ND
2016-04-193761-024-0940ND
2016-04-263761-024-0900ND
2016-05-033761-006-1055ND
2016-05-033761-024-0915ND
2016-05-103761-024-0900ND
2016-05-173761-024-0905ND
2016-05-243761-024-0830ND
2016-05-313761-024-0910ND
2016-06-073761-006-0925ND
2016-06-073761-024-0910ND
2016-06-143761-024-0855ND
2016-06-213761-024-0905ND
2016-06-283761-024-0950ND
2016-07-053761-006-1030ND
2016-07-053761-024-0940ND
2016-07-123761-024-0905ND
2016-07-193761-024-1040ND
2016-07-213761-024-1145ND
2016-07-223761-024-0915ND
2016-07-263761-024-0900ND
2016-08-023761-006-1100ND
2016-08-023761-024-1025ND
2016-08-093761-024-0915ND
2016-08-163761-024-0945ND
2016-08-233761-024-0905ND
2016-08-303761-024-0925ND
2016-09-063761-006-0945ND
2016-09-063761-024-0941ND
2016-09-133761-024-0915ND
2016-09-203761-024-0955ND
2016-09-273761-024-0930ND
2016-10-043761-006-1025ND
2016-10-043761-024-0950ND
2016-10-113761-024-0830ND
2016-10-183761-024-0905ND
2016-10-253761-024-0930ND
2016-11-013761-006-1010ND
2016-11-013761-024-0950ND
2016-11-083761-024-0905ND
2016-11-153761-024-0940ND
2016-11-223761-024-0920ND
2016-11-293761-024-0905ND
2016-12-063761-006-0950ND
2016-12-063761-024-0904ND
2016-12-133761-024-0925ND
2016-12-203761-024-0840ND
2016-12-273761-024-0940ND
2017-01-033761-006-0930ND
2017-01-033761-024-0820ND
2017-01-103761-024-1005ND
2017-01-173761-024-0915ND
2017-01-243761-024-0840ND
2017-01-313761-024-0855ND
2017-02-073761-006-1100ND
2017-02-073761-024-0940ND
2017-02-143761-024-0855ND
2017-02-213761-024-0940ND
2017-02-283761-024-0910ND
2017-03-073761-006-1100ND
2017-03-073761-024-1020ND
2017-03-143761-024-0930ND
2017-03-213761-024-0955ND
2017-03-283761-024-0900ND
2017-04-043761-006-0903ND
2017-04-043761-024-1004ND
2017-04-113761-024-0910ND
2017-04-183761-024-0850ND
2017-04-253761-024-0900ND
2017-05-023761-006-1105ND
2017-05-023761-024-0855ND
2017-05-093761-024-0925ND
2017-05-163761-024-0920ND
2017-05-233761-024-0820ND
2017-05-303761-024-0925ND
2017-06-063761-006-0940ND
2017-06-063761-024-0855ND
2017-06-133761-024-1010ND
2017-06-203761-024-0910ND
2017-06-273761-024-0850ND
2017-07-033761-006-0955ND
2017-07-033761-024-0910ND
2017-07-113761-024-0505ND
2017-07-183761-024-0915ND
2017-07-253761-024-0930ND
2017-08-083761-024-0940ND
2017-08-153761-024-0910ND
2017-08-223761-024-0925ND
2017-08-293761-024-0910ND
2017-09-053761-006-1100ND
2017-09-053761-024-0855ND
2017-09-123761-024-0905ND
2017-09-193761-024-1010ND
2017-09-263761-024-0900ND
2017-10-033761-006-1030ND
2017-10-033761-024-1110ND
2017-10-133761-024-0905ND
2017-10-173761-024-0835ND
2017-10-243761-024-0900ND
2017-11-173761-024-1020ND
2017-11-213761-006-1045ND
2017-11-213761-024-0910ND
2017-11-283761-024-0935ND
2017-12-043761-006-0915ND
2017-12-043761-024-0825ND
2017-12-123761-024-0850ND
2017-12-193761-024-0855ND
2017-12-263761-024-0930ND
2018-01-023761-006-1030ND
2018-01-023761-024-0940ND
2018-01-023761-027-091022.0 ppb
2018-01-093761-024-0840ND
2018-01-093761-027-080021.0 ppb
2018-01-163761-024-0910ND
2018-01-163761-027-081017.0 ppb
2018-01-233761-024-0910ND
2018-01-233761-027-080015.0 ppb
2018-01-303761-024-0840ND
2018-01-303761-027-082012.0 ppb
2018-02-063761-006-1010ND
2018-02-063761-024-0910ND
2018-02-063761-027-082014.0 ppb
2018-02-133761-024-0900ND
2018-02-133761-027-083015.0 ppb
2018-02-203761-024-0920ND
2018-02-203761-027-083014.0 ppb
2018-02-273761-024-0920ND
2018-02-273761-027-083018.0 ppb
2018-03-063761-006-0900ND
2018-03-063761-024-1030ND
2018-03-063761-027-083518.0 ppb
2018-03-133761-024-0850ND
2018-03-133761-027-083016.0 ppb
2018-03-203761-024-0945ND
2018-03-203761-027-083017.0 ppb
2018-03-293761-024-0835ND
2018-03-293761-027-080016.0 ppb
2018-04-033761-006-1115ND
2018-04-033761-024-0930ND
2018-04-033761-027-090015.0 ppb
2018-04-103761-024-0910ND
2018-04-103761-027-081016.0 ppb
2018-04-173761-024-0750ND
2018-04-173761-027-073015.0 ppb
2018-04-243761-024-0940ND
2018-04-243761-027-110011.0 ppb
2018-05-013761-006-1005ND
2018-05-013761-024-0920ND
2018-05-013761-027-084014.0 ppb
2018-05-083761-024-0850ND
2018-05-083761-027-080014.0 ppb
2018-05-153761-024-0835ND
2018-05-153761-027-080012.0 ppb
2018-05-223761-024-0905ND
2018-05-223761-027-081514.0 ppb
2018-05-293761-024-0905ND
2018-05-293761-027-074516.0 ppb
2018-06-053761-006-0755ND
2018-06-053761-024-0915ND
2018-06-053761-027-080015.0 ppb
2018-06-123761-024-0745ND
2018-06-123761-027-073014.0 ppb
2018-06-193761-024-0820ND
2018-06-193761-027-080013.0 ppb
2018-06-263761-024-0840ND
2018-06-263761-027-080014.0 ppb
2018-07-033761-006-0920ND
2018-07-033761-024-0845ND
2018-07-033761-027-082014.0 ppb
2018-07-103761-024-0910ND
2018-07-103761-027-081014.0 ppb
2018-07-123761-024-0825ND
2018-07-173761-024-0910ND
2018-07-173761-027-074514.0 ppb
2018-07-193761-024-0805ND
2018-07-243761-024-0855ND
2018-07-243761-027-080015.0 ppb
2018-07-313761-024-0840ND
2018-07-313761-027-080014.0 ppb
2018-08-073761-006-1020ND
2018-08-073761-024-0925ND
2018-08-073761-027-085013.0 ppb
2018-08-143761-024-1000ND
2018-08-143761-027-091513.0 ppb
2018-08-213761-024-0910ND
2018-08-213761-027-080013.0 ppb
2018-08-283761-024-0835ND
2018-08-283761-027-080013.0 ppb
2018-09-043761-006-0900ND
2018-09-043761-024-0820ND
2018-09-043761-027-074513.0 ppb
2018-09-113761-024-0855ND
2018-09-113761-027-080014.0 ppb
2018-09-183761-024-0850ND
2018-09-183761-027-081513.0 ppb
2018-09-253761-024-0840ND
2018-09-253761-027-081013.0 ppb
2018-10-023761-006-0855ND
2018-10-023761-024-0910ND
2018-10-023761-027-082013.0 ppb
2018-10-093761-024-0840ND
2018-10-093761-027-080013.0 ppb
2018-10-163761-024-0900ND
2018-10-163761-027-083012.0 ppb
2018-10-233761-024-0855ND
2018-10-233761-027-080012.0 ppb
2018-10-303761-024-0840ND
2018-10-303761-027-093012.0 ppb
2018-11-063761-006-0945ND
2018-11-063761-024-0915ND
2018-11-063761-027-084013.0 ppb
2018-11-133761-024-0850ND
2018-11-133761-027-081512.0 ppb
2018-11-203761-024-0900ND
2018-11-203761-027-083012.0 ppb
2018-11-273761-024-0835ND
2018-11-273761-027-081012.0 ppb
2018-12-043761-006-1020ND
2018-12-043761-024-0930ND
2018-12-043761-027-090012.0 ppb
2018-12-113761-024-0855ND
2018-12-113761-027-080012.0 ppb
2018-12-183761-024-0900ND
2018-12-183761-027-083012.0 ppb
2018-12-263761-024-0920ND
2018-12-263761-027-081512.0 ppb
2019-01-023761-006-1000ND
2019-01-023761-024-0915ND
2019-01-023761-027-084012.0 ppb
2019-01-083761-024-0940ND
2019-01-083761-027-083011.0 ppb
2019-01-153761-024-0905ND
2019-01-153761-027-083011.0 ppb
2019-01-223761-024-0745ND
2019-01-223761-027-073012.0 ppb
2019-01-293761-024-0705ND
2019-01-293761-027-075011.0 ppb
2019-02-053761-024-1010ND
2019-02-053761-027-090011.0 ppb
2019-02-063761-006-1015ND
2019-02-123761-024-0720ND
2019-02-123761-027-080011.0 ppb
2019-02-193761-024-0820ND
2019-02-193761-027-080012.0 ppb
2019-02-263761-024-0850ND
2019-02-263761-027-083013.0 ppb
2019-02-283761-024-0910ND
2019-03-053761-006-0805ND
2019-03-053761-024-0750ND
2019-03-053761-027-085511.0 ppb
2019-03-123761-024-0813ND
2019-03-123761-027-080011.0 ppb
2019-03-193761-024-0855ND
2019-03-193761-027-082010.00 ppb
2019-03-263761-024-0825ND
2019-03-263761-027-080010.00 ppb
2019-04-023761-006-0920ND
2019-04-023761-024-0810ND
2019-04-023761-027-100011.0 ppb
2019-04-103761-024-0935ND
2019-04-103761-027-083010.00 ppb
2019-04-163761-024-0840ND
2019-04-163761-027-080011.0 ppb
2019-04-233761-024-0835ND
2019-04-233761-027-080512.0 ppb
2019-04-303761-024-0900ND
2019-05-073761-006-1030ND
2019-05-073761-024-0900ND
2019-05-143761-024-1005ND
2019-05-213761-024-0910ND
2019-05-283761-024-0925ND
2019-06-043761-006-1050ND
2019-06-043761-024-0930ND
2019-06-113761-024-0735ND
2019-06-183761-024-0840ND
2019-06-253761-024-0840ND
2019-07-023761-006-1035ND
2019-07-023761-024-0935ND
2019-07-093761-024-0830ND
2019-07-113761-027-09307.50 ppb
2019-07-163761-024-0935ND
2019-07-163761-027-083011.0 ppb
2019-07-233761-024-0850ND
2019-07-233761-027-083011.0 ppb
2019-07-303761-024-0855ND
2019-07-303761-027-083011.0 ppb
2019-08-063761-006-0915ND
2019-08-063761-024-0840ND
2019-08-063761-027-110011.0 ppb
2019-08-133761-024-0905ND
2019-08-133761-027-082011.0 ppb
2019-08-203761-024-0840ND
2019-08-203761-027-080511.0 ppb
2019-08-273761-024-0850ND
2019-08-273761-027-083010.00 ppb
2019-09-033761-006-0900ND
2019-09-033761-024-0835ND
2019-09-033761-027-074510.00 ppb
2019-09-103761-024-0835ND
2019-09-103761-027-081012.0 ppb
2019-09-173761-024-0855ND
2019-09-173761-027-081010.00 ppb
2019-09-243761-024-0835ND
2019-09-243761-027-080011.0 ppb
2019-10-013761-006-0945ND
2019-10-013761-024-0850ND
2019-10-013761-027-082011.0 ppb
2019-10-083761-024-0805ND
2019-10-083761-027-074510.00 ppb
2019-10-153761-024-0745ND
2019-10-153761-027-073010.00 ppb
2019-10-213761-024-0840ND
2019-10-213761-027-08159.80 ppb
2019-10-293761-024-0805ND
2019-10-293761-027-08459.80 ppb
2019-11-053761-006-1010ND
2019-11-053761-024-0830ND
2019-11-053761-027-08059.70 ppb
2019-11-073761-024-0930ND
2019-11-123761-024-0815ND
2019-11-123761-027-07459.60 ppb
2019-11-143761-024-0915ND
2019-11-193761-024-0855ND
2019-11-193761-027-09109.90 ppb
2019-11-263761-024-0840ND
2019-11-263761-027-08009.50 ppb
2019-12-033761-006-0745ND
2019-12-033761-024-0905ND
2019-12-033761-027-11009.20 ppb
2019-12-123761-024-0925ND
2019-12-123761-027-10459.70 ppb
2019-12-173761-024-0830ND
2019-12-173761-027-08009.10 ppb
2019-12-243761-024-0810ND
2019-12-243761-027-08159.40 ppb
2019-12-313761-024-0830ND
2019-12-313761-027-080010.00 ppb