Know Your Environment. Protect Your Health.

Uranium

Cws - Upper Bodfish 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.

 

227

Samples

19

Samples exceeding legal limit (MCL)

139

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20185.78 pCi/L4321ND - 23.12 pCi/L
20197.43 pCi/L3522ND - 24.00 pCi/L
20207.53 pCi/L3521ND - 24.70 pCi/L
20217.73 pCi/L2917ND - 24.00 pCi/L
20227.94 pCi/L5036ND - 22.00 pCi/L
20238.79 pCi/L3522ND - 27.50 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
2018-01-17CA1510026_006_006-2018011711049.51 pCi/L
2018-01-17CA1510026_007_007-201801171059ND
2018-02-14CA1510026_006_006-2018021415108.96 pCi/L
2018-02-14CA1510026_007_007-201802141121ND
2018-02-14CA1510026_004_004-20180214111518.77 pCi/L
2018-02-21CA1510026_005_005-2018022113434.28 pCi/L
2018-02-21CA1510026_007_007-201802211325ND
2018-02-21CA1510026_004_004-20180221133418.26 pCi/L
2018-03-13CA1510026_006_006-20180313130011.16 pCi/L
2018-03-13CA1510026_007_007-201803131316ND
2018-04-04CA1510026_007_007-201804041042ND
2018-04-16CA1510026_006_006-20180416142410.58 pCi/L
2018-04-16CA1510026_007_007-201804161432ND
2018-05-16CA1510026_005_005-2018051613386.17 pCi/L
2018-05-16CA1510026_004_004-20180516133223.12 pCi/L
2018-05-16CA1510026_006_006-20180516132710.89 pCi/L
2018-05-16CA1510026_007_007-201805161343ND
2018-06-12CA1510026_007_007-201806121429ND
2018-06-18CA1510026_007_007-201806181350ND
2018-06-18CA1510026_006_006-20180618134410.30 pCi/L
2018-07-16CA1510026_006_006-2018071613069.48 pCi/L
2018-07-16CA1510026_007_007-201807161325ND
2018-08-01CA1510026_007_007-201808011408ND
2018-08-08CA1510026_007_007-201808081446ND
2018-08-13CA1510026_004_004-20180813114821.46 pCi/L
2018-08-13CA1510026_005_005-2018081311546.53 pCi/L
2018-08-13CA1510026_007_007-201808131209ND
2018-08-13CA1510026_DST_902-201808131227ND
2018-08-13CA1510026_DST_901-201808131219ND
2018-08-13CA1510026_006_006-2018081312009.58 pCi/L
2018-09-06CA1510026_007_007-201809061336ND
2018-09-19CA1510026_006_006-2018091912098.54 pCi/L
2018-09-19CA1510026_007_007-201809191214ND
2018-10-08CA1510026_007_007-201810081224ND
2018-10-16CA1510026_006_006-20181016133511.67 pCi/L
2018-10-16CA1510026_007_007-201810161326ND
2018-11-14CA1510026_004_004-20181114132222.38 pCi/L
2018-11-14CA1510026_005_005-2018111413287.66 pCi/L
2018-11-14CA1510026_007_007-201811141347ND
2018-11-14CA1510026_006_006-2018111413359.72 pCi/L
2018-12-10CA1510026_007_007-201812101100ND
2018-12-11CA1510026_007_007-201812111105ND
2018-12-11CA1510026_006_006-2018121110579.37 pCi/L
2019-01-22CA1510026_007_007-201901221110ND
2019-01-22CA1510026_006_006-2019012211029.25 pCi/L
2019-02-06CA1510026_004_004-20190206124520.77 pCi/L
2019-02-06CA1510026_005_005-2019020612558.16 pCi/L
2019-02-06CA1510026_007_007-201902061227ND
2019-02-20CA1510026_006_006-2019022009459.07 pCi/L
2019-02-20CA1510026_007_007-201902200950ND
2019-02-20CA1510026_005_005-2019022009407.98 pCi/L
2019-02-20CA1510026_004_004-20190220093522.36 pCi/L
2019-03-27CA1510026_006_006-2019032710407.65 pCi/L
2019-03-27CA1510026_007_007-201903271045ND
2019-04-09CA1510026_007_007-201904091343ND
2019-04-09CA1510026_006_006-2019040913208.71 pCi/L
2019-04-17CA1510026_006_006-2019041709408.37 pCi/L
2019-04-17CA1510026_007_007-201904170950ND
2019-05-15CA1510026_006_006-2019051511089.80 pCi/L
2019-05-15CA1510026_007_007-201905151112ND
2019-05-15CA1510026_004_004-20190515110224.00 pCi/L
2019-05-15CA1510026_005_005-2019051511059.20 pCi/L
2019-06-19CA1510026_006_006-20190619133210.61 pCi/L
2019-06-19CA1510026_007_007-201906191334ND
2019-07-22CA1510026_007_007-201907221120ND
2019-07-22CA1510026_006_006-2019072211158.15 pCi/L
2019-08-28CA1510026_006_006-20190828114310.00 pCi/L
2019-08-28CA1510026_004_004-20190828113721.42 pCi/L
2019-08-28CA1510026_005_005-2019082811407.53 pCi/L
2019-08-28CA1510026_007_007-201908281147ND
2019-09-11CA1510026_006_006-20190911094013.00 pCi/L
2019-09-11CA1510026_007_007-201909110950ND
2019-10-28CA1510026_006_006-2019102813429.47 pCi/L
2019-10-28CA1510026_007_007-201910281336ND
2019-11-19CA1510026_005_005-2019111913485.99 pCi/L
2019-11-19CA1510026_007_007-201911191352ND
2019-11-19CA1510026_006_006-20191119135012.73 pCi/L
2019-11-19CA1510026_004_004-20191119134515.94 pCi/L
2020-01-22CA1510026_007_007-202001221134ND
2020-01-22CA1510026_006_006-20200122112812.35 pCi/L
2020-02-04CA1510026_007_007-202002041250ND
2020-02-04CA1510026_006_006-20200204125713.74 pCi/L
2020-02-04CA1510026_004_004-20200204130324.23 pCi/L
2020-02-04CA1510026_005_005-2020020413106.86 pCi/L
2020-03-16CA1510026_007_007-202003161209ND
2020-03-16CA1510026_006_006-20200316121212.45 pCi/L
2020-04-01CA1510026_006_006-20200401134511.32 pCi/L
2020-04-01CA1510026_007_007-202004011333ND
2020-04-15CA1510026_007_007-202004150925ND
2020-04-15CA1510026_006_006-20200415093113.00 pCi/L
2020-06-08CA1510026_007_007-202006081115ND
2020-06-08CA1510026_006_006-20200608112511.99 pCi/L
2020-06-23CA1510026_006_006-20200623081813.00 pCi/L
2020-06-23CA1510026_007_007-202006230825ND
2020-07-20CA1510026_007_007-202007201303ND
2020-07-20CA1510026_006_006-20200720125510.99 pCi/L
2020-08-05CA1510026_006_006-20200805115010.80 pCi/L
2020-08-05CA1510026_007_007-202008051121ND
2020-08-05CA1510026_005_005-2020080512016.00 pCi/L
2020-08-18CA1510026_004_004-20200818100724.70 pCi/L
2020-08-18CA1510026_007_007-202008180955ND
2020-08-18CA1510026_006_006-20200818100211.90 pCi/L
2020-08-18CA1510026_005_005-2020081810116.60 pCi/L
2020-09-09CA1510026_006_006-20200909075113.00 pCi/L
2020-09-09CA1510026_007_007-202009090746ND
2020-10-20CA1510026_007_007-202010201139ND
2020-10-20CA1510026_006_006-20201020112910.90 pCi/L
2020-11-12CA1510026_004_004-20201112114221.80 pCi/L
2020-11-12CA1510026_005_005-2020111212136.30 pCi/L
2020-11-12CA1510026_007_007-202011121218ND
2020-11-12CA1510026_006_006-20201112113611.60 pCi/L
2020-12-09CA1510026_006_006-20201209111210.10 pCi/L
2020-12-09CA1510026_007_007-202012091118ND
2021-01-20CA1510026_007_007-202101201236ND
2021-01-20CA1510026_006_006-20210120124111.00 pCi/L
2021-02-11CA1510026_004_004-20210211125322.00 pCi/L
2021-02-11CA1510026_006_006-20210211124911.00 pCi/L
2021-02-11CA1510026_005_005-2021021112576.60 pCi/L
2021-02-11CA1510026_007_007-202102111244ND
2021-03-02CA1510026_006_006-20210302082311.00 pCi/L
2021-03-02CA1510026_007_007-202103020814ND
2021-04-07CA1510026_007_007-202104071326ND
2021-05-05CA1510026_004_004-20210505135820.00 pCi/L
2021-05-05CA1510026_005_005-2021050514026.00 pCi/L
2021-06-08CA1510026_007_007-202106081221ND
2021-07-13CA1510026_007_007-202107131158ND
2021-07-13CA1510026_006_006-20210713114312.00 pCi/L
2021-07-13CA1510026_007_007-202107131158ND
2021-08-03CA1510026_007_007-202108031347ND
2021-08-03CA1510026_006_006-20210803134213.00 pCi/L
2021-08-05CA1510026_004_004-20210805134224.00 pCi/L
2021-08-05CA1510026_005_005-2021080513478.30 pCi/L
2021-09-09CA1510026_006_006-20210909142511.00 pCi/L
2021-09-09CA1510026_007_007-202109091440ND
2021-10-07CA1510026_007_007-202110071434ND
2021-10-07CA1510026_006_006-20211007144213.00 pCi/L
2021-11-09CA1510026_007_007-202111090830ND
2021-11-09CA1510026_004_004-20211109081424.00 pCi/L
2021-11-09CA1510026_005_005-2021110908208.20 pCi/L
2021-11-09CA1510026_006_006-20211109075912.00 pCi/L
2021-12-14CA1510026_006_006-20211214104511.00 pCi/L
2021-12-14CA1510026_007_007-202112141050ND
2022-01-11CA1510026_004_004-20220111101121.00 pCi/L
2022-01-11CA1510026_005_005-2022011110176.50 pCi/L
2022-01-18CA1510026_004_004-20220118141620.00 pCi/L
2022-01-18CA1510026_005_005-2022011814277.10 pCi/L
2022-01-18CA1510026_007_007-202201181324ND
2022-01-18CA1510026_006_006-20220118133912.00 pCi/L
2022-02-25CA1510026_006_006-2022022509058.90 pCi/L
2022-02-25CA1510026_004_004-20220225091620.00 pCi/L
2022-02-25CA1510026_005_005-2022022509217.60 pCi/L
2022-02-25CA1510026_007_007-202202250858ND
2022-03-08CA1510026_005_005-2022030811236.90 pCi/L
2022-03-08CA1510026_004_004-20220308112019.00 pCi/L
2022-03-15CA1510026_006_006-20220315092710.60 pCi/L
2022-03-15CA1510026_007_007-202203150932ND
2022-04-06CA1510026_007_007-202204061425ND
2022-04-06CA1510026_006_006-20220406142011.40 pCi/L
2022-04-19CA1510026_006_006-20220419131710.20 pCi/L
2022-04-19CA1510026_007_007-202204191312ND
2022-04-19CA1510026_004_004-20220419130222.00 pCi/L
2022-04-19CA1510026_005_005-2022041913068.30 pCi/L
2022-05-03CA1510026_004_004-20220503115912.20 pCi/L
2022-05-03CA1510026_005_005-2022050312048.40 pCi/L
2022-05-03CA1510026_007_007-202205031143ND
2022-05-03CA1510026_005_005-2022050312048.00 pCi/L
2022-05-03CA1510026_006_006-2022050311538.30 pCi/L
2022-05-03CA1510026_007_007-202205031143ND
2022-05-03CA1510026_004_004-20220503115912.60 pCi/L
2022-05-03CA1510026_006_006-2022050311538.40 pCi/L
2022-06-01CA1510026_007_007-202206011143ND
2022-06-01CA1510026_006_006-2022060111498.60 pCi/L
2022-06-01CA1510026_006_006-2022060111498.70 pCi/L
2022-07-13CA1510026_007_007-202207131404ND
2022-07-13CA1510026_006_006-2022071313498.80 pCi/L
2022-07-13CA1510026_006_006-2022071313498.80 pCi/L
2022-08-10CA1510026_006_006-2022081014008.60 pCi/L
2022-08-10CA1510026_005_005-2022081014117.60 pCi/L
2022-08-10CA1510026_004_004-20220810140615.00 pCi/L
2022-08-10CA1510026_005_005-2022081014117.80 pCi/L
2022-08-10CA1510026_006_006-2022081014008.90 pCi/L
2022-08-10CA1510026_007_007-202208101424ND
2022-09-14CA1510026_006_006-20220914090210.00 pCi/L
2022-09-14CA1510026_007_007-202209140910ND
2022-10-11CA1510026_006_006-2022101113278.30 pCi/L
2022-10-11CA1510026_007_007-202210111320ND
2022-11-08CA1510026_004_004-20221108130916.00 pCi/L
2022-11-08CA1510026_006_006-20221108130112.00 pCi/L
2022-11-08CA1510026_007_007-202211081254ND
2022-11-08CA1510026_005_005-2022110813159.30 pCi/L
2022-12-06CA1510026_006_006-2022120611229.20 pCi/L
2022-12-06CA1510026_007_007-202212061115ND
2023-01-18CA1510026_007_007-202301181102ND
2023-01-18CA1510026_006_006-20230118105210.00 pCi/L
2023-02-01CA1510026_007_007-202302011515ND
2023-02-06CA1510026_004_004-20230206121122.00 pCi/L
2023-02-06CA1510026_005_005-20230206121710.00 pCi/L
2023-02-06CA1510026_007_007-202302061158ND
2023-02-06CA1510026_006_006-20230206120610.80 pCi/L
2023-02-06CA1510026_005_005-20230206121710.10 pCi/L
2023-02-06CA1510026_006_006-20230206120610.60 pCi/L
2023-03-06CA1510026_006_006-20230306095414.40 pCi/L
2023-03-06CA1510026_007_007-202303061010ND
2023-04-11CA1510026_006_006-20230411135614.50 pCi/L
2023-04-12CA1510026_007_007-202304121220ND
2023-05-08CA1510026_005_005-2023050811447.60 pCi/L
2023-05-08CA1510026_006_006-20230508112712.70 pCi/L
2023-05-08CA1510026_007_007-202305081135ND
2023-05-08CA1510026_004_004-20230508114023.20 pCi/L
2023-06-06CA1510026_006_006-20230606114713.50 pCi/L
2023-06-06CA1510026_007_007-202306061152ND
2023-07-11CA1510026_007_007-202307111418ND
2023-07-12CA1510026_006_006-20230712114513.30 pCi/L
2023-08-09CA1510026_006_006-20230809132312.40 pCi/L
2023-08-09CA1510026_004_004-20230809133323.60 pCi/L
2023-08-09CA1510026_007_007-202308091347ND
2023-08-09CA1510026_005_005-2023080913366.00 pCi/L
2023-09-05CA1510026_007_007-202309051311ND
2023-09-05CA1510026_006_006-20230905130314.00 pCi/L
2023-10-03CA1510026_006_006-20231003105514.70 pCi/L
2023-10-03CA1510026_007_007-202310031050ND
2023-11-06CA1510026_006_006-20231106143614.30 pCi/L
2023-11-13CA1510026_004_004-20231113113527.50 pCi/L
2023-11-13CA1510026_007_007-202311131130ND
2023-11-13CA1510026_005_005-2023111311408.60 pCi/L
2023-12-13CA1510026_006_006-20231213141014.00 pCi/L
2023-12-13CA1510026_007_007-202312131400ND