EWG's Tap Water Database — 2019 UPDATE



Jackson County PWSD1

NOTE: Jackson County PWSD1 purchases water from Kansas City which is required to test for selenium. Sample information shown below was taken by Kansas City.

Selenium is an essential element in diets. But too much selenium can decrease thyroid hormone production and cause hair loss, skin lesions and brittle fingernails.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20120.867 ppb126ND - 2.50 ppb
20131.11 ppb128ND - 2.23 ppb
20141.98 ppb12121.05 ppb - 2.38 ppb
20152.39 ppb12121.98 ppb - 3.18 ppb
20161.68 ppb12121.07 ppb - 2.85 ppb
20171.93 ppb661.03 ppb - 2.85 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 30 ppb

The EWG Health Guideline of 30 ppb for selenium 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 hair loss and nail damage.

EPA Maximum Contaminant
Level (MCL) 50 ppb

The legal limit for selenium, established in 1991, was based on human epidemiological studies of populations exposed to naturally occurring selenium in drinking water. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

NOTE: Jackson County PWSD1 purchases water from Kansas City which is required to test for selenium. Sample information shown below was taken by Kansas City.

Date Lab ID Result
2012-07-02C27465A2.50 ppb
2012-07-31C31664A2.00 ppb
2012-09-30C40025A1.50 ppb
2012-10-31C43881A1.30 ppb
2012-11-30C48533A1.30 ppb
2012-12-31C52447A1.80 ppb
2013-01-31C564011.50 ppb
2013-02-28C598961.80 ppb
2013-05-01C686321.000 ppb
2013-06-30C768231.29 ppb
2013-07-31C803962.23 ppb
2013-10-31C930632.15 ppb
2013-12-02C954241.40 ppb
2013-12-31D001011.95 ppb
2014-01-31D036221.95 ppb
2014-02-28D070052.18 ppb
2014-04-02D112862.38 ppb
2014-04-30D159711.95 ppb
2014-05-31D190791.90 ppb
2014-06-30D246512.28 ppb
2014-07-31D268401.05 ppb
2014-08-31D309842.33 ppb
2014-09-30D347832.25 ppb
2014-10-31D383551.73 ppb
2014-11-30D429331.80 ppb
2014-12-31D481181.98 ppb
2015-01-31D517152.05 ppb
2015-02-28D542342.25 ppb
2015-03-31D575982.43 ppb
2015-04-30D616482.40 ppb
2015-05-31D658702.35 ppb
2015-06-30D713422.25 ppb
2015-07-31D759822.05 ppb
2015-08-31D792541.98 ppb
2015-09-30D817122.40 ppb
2015-10-31D878582.75 ppb
2015-11-30D898582.55 ppb
2015-12-31D941883.18 ppb
2016-01-31D977891.07 ppb
2016-02-29E013581.17 ppb
2016-03-31E051101.50 ppb
2016-04-30E092371.47 ppb
2016-05-31E132191.25 ppb
2016-06-30E187691.29 ppb
2016-07-31E213172.85 ppb
2016-09-01E254522.43 ppb
2016-09-30E298002.23 ppb
2016-11-01E334292.58 ppb
2016-12-01E373001.17 ppb
2016-12-31E447231.16 ppb
2017-01-31E451992.63 ppb
2017-02-28E499862.63 ppb
2017-03-31E525222.85 ppb
2017-04-30E567111.03 ppb
2017-06-01E607601.10 ppb
2017-06-30E663131.34 ppb