Know Your Environment. Protect Your Health.

Selenium

Markridge Park Subdivision Water System

NOTE: Markridge Park Subdivision Water System purchases water from City of Carencro Water System which is required to test for selenium. Sample information shown below was taken by City of Carencro Water System.

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND140ND
2021ND40ND
2022ND20ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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: Markridge Park Subdivision Water System purchases water from City of Carencro Water System which is required to test for selenium. Sample information shown below was taken by City of Carencro Water System.

Date Lab ID Result
2019-02-18B1900700-002ND
2019-02-18B1900700-001ND
2019-02-18B1900700-002ND
2019-02-18B1900700-001ND
2020-04-13B2001705-004ND
2020-04-13B2001705-003ND
2020-04-13B2001705-002ND
2020-04-13B2001705-001ND
2020-11-2335594862002ND
2020-12-0735597470007ND
2020-12-07B2006491-001ND
2020-12-07B2006491-002ND
2020-12-0735597470005ND
2020-12-0735597470004ND
2020-12-0735597470003ND
2020-12-0735597470002ND
2020-12-0735597470001ND
2020-12-0735597470006ND
2021-02-11B2100610-001ND
2021-08-03B2103661-001ND
2021-08-03B2103661-002ND
2021-11-16B2106131-001ND
2021-11-16B2106131-002ND
2022-03-21B2201299-001ND
2022-03-21B2201299-002ND
2023-03-13B2301042-001ND
2023-03-13B2301042-002ND