Know Your Environment. Protect Your Health.

Uranium

Veiola Water Idaho

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.

 

210

Samples

7

Samples exceeding legal limit (MCL)

139

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20184.08 pCi/L5637ND - 18.09 pCi/L
20193.24 pCi/L4324ND - 24.12 pCi/L
20203.63 pCi/L2616ND - 14.74 pCi/L
20215.15 pCi/L3827ND - 26.80 pCi/L
20226.79 pCi/L2218ND - 26.80 pCi/L
20235.28 pCi/L2517ND - 20.10 pCi/L

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

Date Lab ID Result
2018-02-01R18045958.04 pCi/L
2018-02-01R18045932.01 pCi/L
2018-02-05R18049863.35 pCi/L
2018-02-06R1805276ND
2018-02-06R1805274ND
2018-02-06R1805280ND
2018-02-12R18061533.35 pCi/L
2018-05-15R1821860ND
2018-05-15R18218632.01 pCi/L
2018-05-15R1821851ND
2018-05-23R1823162ND
2018-05-23R1823164ND
2018-05-23R182316512.73 pCi/L
2018-06-05R18253302.68 pCi/L
2018-06-05R18253320.67 pCi/L
2018-06-05R18253290.67 pCi/L
2018-06-06R18255824.02 pCi/L
2018-06-06R182558312.73 pCi/L
2018-06-06R1825581ND
2018-06-06R18255883.35 pCi/L
2018-06-12R182649718.09 pCi/L
2018-06-15R18273454.02 pCi/L
2018-06-21R1828601ND
2018-06-21R1828641ND
2018-06-21R1828606ND
2018-06-21R1828608ND
2018-06-26R18293436.03 pCi/L
2018-06-26R1829344ND
2018-06-26R18293422.68 pCi/L
2018-06-26R18293452.01 pCi/L
2018-06-26R18293417.37 pCi/L
2018-07-02R1830574ND
2018-07-02R18305730.67 pCi/L
2018-07-02R18305721.34 pCi/L
2018-07-02R18305783.35 pCi/L
2018-07-02R18305712.68 pCi/L
2018-07-03R18310446.03 pCi/L
2018-07-05R1831162ND
2018-07-10R183203111.39 pCi/L
2018-07-10R18320362.01 pCi/L
2018-07-10R18320296.03 pCi/L
2018-07-10R18322705.36 pCi/L
2018-07-10R18320425.36 pCi/L
2018-07-10R18320442.01 pCi/L
2018-07-17R18338265.36 pCi/L
2018-07-18R1833957ND
2018-07-18R18339555.36 pCi/L
2018-07-18R18339595.36 pCi/L
2018-07-18R1833962ND
2018-08-21R184073513.40 pCi/L
2018-08-28R184207214.74 pCi/L
2018-09-04R184318718.09 pCi/L
2018-09-11R184485418.09 pCi/L
2018-11-08R18555676.03 pCi/L
2018-11-19R1857271ND
2018-11-19R1857274ND
2019-01-10R19018266.03 pCi/L
2019-01-31R1904611ND
2019-01-31R19046154.02 pCi/L
2019-02-07R1905724ND
2019-02-19R1907388ND
2019-03-06R1909865ND
2019-03-06R19098680.67 pCi/L
2019-04-17R19173192.68 pCi/L
2019-04-22R19182410.67 pCi/L
2019-04-22R1918243ND
2019-04-30R1919661ND
2019-04-30R1919664ND
2019-05-29R19251216.03 pCi/L
2019-05-29R1925124ND
2019-06-11R19276192.01 pCi/L
2019-06-12R19279744.69 pCi/L
2019-06-12R19279761.34 pCi/L
2019-06-12R1927979ND
2019-06-13R192824324.12 pCi/L
2019-06-20R19296542.01 pCi/L
2019-07-03R19321184.02 pCi/L
2019-07-09R1933029ND
2019-07-10R1933343ND
2019-07-10R19333413.35 pCi/L
2019-07-10R1933348ND
2019-07-10R19333465.36 pCi/L
2019-07-1819351455.36 pCi/L
2019-07-18R19351431.34 pCi/L
2019-07-19R1935265ND
2019-08-02R19379285.36 pCi/L
2019-08-02R1937927ND
2019-08-05R1938146ND
2019-08-05R1938144ND
2019-08-28R1942932ND
2019-08-28R19429301.34 pCi/L
2019-08-29R19432246.70 pCi/L
2019-08-30R194356512.73 pCi/L
2019-09-05R1944523ND
2019-09-06R194477016.08 pCi/L
2019-09-11R194576918.09 pCi/L
2019-10-02R19496933.35 pCi/L
2019-10-15R1951896ND
2019-11-13R19571722.01 pCi/L
2020-03-05R20100838.04 pCi/L
2020-03-17R2012065ND
2020-05-12R2021372ND
2020-06-22R2029096ND
2020-06-24R20296862.68 pCi/L
2020-06-25R20299778.71 pCi/L
2020-06-25R2029965ND
2020-07-06R20313746.03 pCi/L
2020-07-06R20313722.01 pCi/L
2020-07-06R20313682.01 pCi/L
2020-07-07R203160514.74 pCi/L
2020-07-07R2031609ND
2020-07-09R2032313ND
2020-07-09R20323182.01 pCi/L
2020-07-09R2032320ND
2020-07-15R2033261ND
2020-07-15R20332486.70 pCi/L
2020-07-22R20347952.68 pCi/L
2020-07-24R20352656.70 pCi/L
2020-07-29R20361787.37 pCi/L
2020-07-30R20363432.01 pCi/L
2020-08-21R20409748.71 pCi/L
2020-08-25R20414962.68 pCi/L
2020-09-01R204266111.39 pCi/L
2020-10-07R2050272ND
2020-10-15R2061733ND
2021-02-10R21064411.34 pCi/L
2021-02-22R2108110ND
2021-02-22R2108114ND
2021-02-23R2108305ND
2021-02-25R21088830.67 pCi/L
2021-04-05R21151260.67 pCi/L
2021-04-14R21165786.03 pCi/L
2021-04-21R21182671.34 pCi/L
2021-05-05R212127713.40 pCi/L
2021-05-05R2121271ND
2021-05-05R2121274ND
2021-05-12R21226936.70 pCi/L
2021-06-02R212662112.06 pCi/L
2021-06-02R21266196.03 pCi/L
2021-06-09R2128359ND
2021-06-14R21291945.36 pCi/L
2021-06-16R21297418.04 pCi/L
2021-06-16R212974822.11 pCi/L
2021-06-16R21297462.01 pCi/L
2021-07-06R2133431ND
2021-07-06R21334181.34 pCi/L
2021-07-06R2133416ND
2021-07-06R2133411ND
2021-07-07R21339725.36 pCi/L
2021-07-19R21362594.69 pCi/L
2021-07-27R21381701.34 pCi/L
2021-07-29R21386082.68 pCi/L
2021-08-03R213958326.80 pCi/L
2021-08-04R21399064.02 pCi/L
2021-08-09R21407754.69 pCi/L
2021-08-09R214077312.73 pCi/L
2021-08-09R21407714.69 pCi/L
2021-09-01R214579420.10 pCi/L
2021-10-04R215267514.07 pCi/L
2021-10-04R2152671ND
2021-10-11R21544275.36 pCi/L
2021-10-11R2154378ND
2021-10-12R21546362.01 pCi/L
2022-02-01R22048862.68 pCi/L
2022-02-08R22063502.68 pCi/L
2022-02-22R22086812.68 pCi/L
2022-03-08R22109922.68 pCi/L
2022-03-09R22113362.01 pCi/L
2022-03-29R22148766.70 pCi/L
2022-03-29R22148766.70 pCi/L
2022-05-04R2221318ND
2022-05-11R22225731.34 pCi/L
2022-05-11R222537217.42 pCi/L
2022-06-28R22308542.01 pCi/L
2022-07-12R2233126ND
2022-07-12R223312326.80 pCi/L
2022-07-12R22331215.36 pCi/L
2022-07-19R223459618.09 pCi/L
2022-07-19R2234594ND
2022-10-04R224948126.80 pCi/L
2022-10-06R22501954.69 pCi/L
2022-10-12R2251167ND
2022-10-12R225116617.42 pCi/L
2022-11-01R22545760.67 pCi/L
2022-11-07R22552752.68 pCi/L
2023-01-24R2301536-018.04 pCi/L
2023-03-08R2304392-012.01 pCi/L
2023-03-09R2304517-0316.75 pCi/L
2023-03-09R2304517-09ND
2023-04-26R2307945-012.68 pCi/L
2023-04-26R2307950-0216.75 pCi/L
2023-04-26R2307950-04ND
2023-04-26R2307950-065.36 pCi/L
2023-06-07R2311310-019.38 pCi/L
2023-06-09R2311498-011.34 pCi/L
2023-06-09R2311484-011.34 pCi/L
2023-06-27R2312922-012.01 pCi/L
2023-07-06R2313595-01ND
2023-07-06R2313603-01ND
2023-07-13R2314332-0117.42 pCi/L
2023-07-19R2314930-011.34 pCi/L
2023-07-26R2315513-016.70 pCi/L
2023-07-26R2315525-01ND
2023-07-26R2315537-01ND
2023-07-31R2315915-010.67 pCi/L
2023-07-31R2315880-01ND
2023-07-31R2315875-0120.10 pCi/L
2023-10-04R2321604-01ND
2023-10-04R2321608-0118.09 pCi/L
2023-11-01R2323669-012.01 pCi/L