Know Your Environment. Protect Your Health.

Uranium

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 uranium. Sample information shown below was taken by City of Carencro Water System.

Uranium is a known human carcinogen. The federal legal limit for uranium is set at 30 micrograms per liter (corresponding to parts per billion), but utilities can also report uranium in picocuries per liter (pCi/L), which is a measure of radioactivity in water. EWG translated all uranium results to pCi/L using a conversion factor developed by the EPA. With this conversion approach, the limit of 30 ppb corresponds to 20 pCi/L. Drinking water with this much uranium would cause more than 4.6 cancer cases in a population of 100,000. California set a public health goal for uranium of 0.43 pCi/L. Read More.

Multiple forms of uranium can be detected in water, including uranium-234, uranium-235 and uranium-238. Uranium-234 is the most toxic form of uranium for human health.

 

29

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
2023ND40ND

pCi/L = picocuries per liter

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.43 pCi/L

The EWG Health Guideline of 0.43 pCi/L for uranium 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. Three most common uranium isotopes are U-234, U-235 and U-238. All isotopes of uranium are radioactive, and the total radioactivity depends on the ratio of isotopes. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL): 20 pCi/L

pCi/L = picocuries per liter

All test results

NOTE: Markridge Park Subdivision Water System purchases water from City of Carencro Water System which is required to test for uranium. 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
2020-04-13B2001705-001ND
2020-04-13B2001705-004ND
2020-04-13B2001705-003ND
2020-04-13B2001705-002ND
2020-11-2335594862002ND
2020-12-0735597470006ND
2020-12-0735597470007ND
2020-12-07B2006491-001ND
2020-12-07B2006491-002ND
2020-12-0735597470004ND
2020-12-0735597470003ND
2020-12-0735597470002ND
2020-12-0735597470001ND
2020-12-0735597470005ND
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
2023-03-1335786267001ND
2023-03-1335786267002ND
2023-03-13B2301042-001ND
2023-03-13B2301042-002ND