Know Your Environment. Protect Your Health.

Radium, combined (-226 and -228)

Crestview Mutual Water Company

NOTE: Crestview Mutual Water Company purchases water from Calleguas Municipal Water District which is required to test for radium, combined (-226 and -228). Sample information shown below was taken by Calleguas Municipal Water District.

Radium is a radioactive element that causes bone cancer and other cancers. It can occur naturally in groundwater, and oil and gas extraction activities such as hydraulic fracturing can elevate concentrations. Read More.

Radium releases radioactive particles that harm health in many ways, causing tumors in bone, lungs and other organs; leukemia; and skin and blood damage. Water utilities typically report radium amounts in picocuries per liter (pCi/L), which is a measure of radioactivity in water. The two most common forms of radium are radium-226 and radium-228. They may be reported separately or together.

Federal law allows up to 5 picocuries per liter of combined radium-226 and radium-228 in tap water. Research by the U.S. Geological Survey shows that in some regions of the country, such as the mid-continental region and North Atlantic coastal region, more than 20 percent of sampled wells have radium in levels exceeding the federal drinking water limit. And the legal limit does not equate safety: The EPA estimates that one in every 10,000 people drinking water containing radium at this level would develop cancer over a lifetime.

California set a public health goal much lower than the federal limit – 0.05 picocuries per liter of radium-226 and 0.019 picocuries per liter of radium-228, concentrations that are lower than the detection limit for most water tests.

Click here to read more on radiological contaminants.

 

190

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

pCi/L = picocuries per liter

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.05 pCi/L

EWG applied the health guideline of 0.05 pCi/L, defined by the California Office of Environmental Health Hazard Assessment as a public health goal for radium-226, to radium-226 and radium-228 combined. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL): 5 pCi/L

The legal limit for combined radium-226 and radium-228, established in 1976, was based on costs for radium removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to radium exposure.

pCi/L = picocuries per liter

All test results

NOTE: Crestview Mutual Water Company purchases water from Calleguas Municipal Water District which is required to test for radium, combined (-226 and -228). Sample information shown below was taken by Calleguas Municipal Water District.

Date Lab ID Result
2018-02-13CA1010007_082_082-201806261145ND
2018-02-13CA1010007_096_096-201803200925ND
2018-02-13CA1010007_096_096-201804251136ND
2018-02-13CA1010007_204_204-201801241100ND
2018-02-13CA2210900_020_020-201812191005ND
2018-02-13CA3010038_022_022-201802211120ND
2018-02-13CA3410004_009_009-201812060852ND
2018-02-26CA1010007_096_096-201801241115ND
2018-02-26CA1010007_096_096-201806261240ND
2018-02-26CA3910011_004_004-201806070741ND
2018-02-26CA3910011_006_006-201806070835ND
2018-02-27CA1010007_204_204-201807111130ND
2018-02-27CA3010038_025_025-201802210630ND
2018-02-27CA3410004_009_009-201812060852ND
2018-02-27CA3910012_DST_902-201810170924ND
2018-03-05CA1010007_089_089-201810241005ND
2018-03-05CA2210900_001_001-201812191229ND
2018-03-05CA3910012_DST_900-201804180737ND
2018-03-06CA1010007_079_079-201807270915ND
2018-03-06CA3910012_DST_906-201801171125ND
2018-03-07CA1010007_079_079-201807270915ND
2018-03-07CA2010801_005_005-201808280915ND
2018-03-07CA3010092_058_058-201810091315ND
2018-03-07CA3910012_DST_913-201801170920ND
2018-03-07CA3910015_DST_903-201812031255ND
2018-03-08CA1010007_079_079-201809260845ND
2018-03-08CA1010007_095_095-201810241000ND
2018-03-08CA3910012_DST_917-201804181021ND
2018-04-30CA2410001_019_019-201811290855ND
2018-04-30CA3010038_022_022-201805151240ND
2018-11-05CA1010007_096_096-201812190840ND
2018-11-05CA2010801_002_002-201808071145ND
2019-01-29CA1910124_025_025-202105181010ND
2019-01-29CA3010010_021_021-201907180850ND
2019-01-29CA3010010_021_021-201910221135ND
2019-02-01CA3000519_005_005-201911071310ND
2019-02-01CA3010004_012_012-201902260950ND
2019-02-01CA3010004_DST_802-202005120945ND
2019-02-01CA3010017_DST_802-202005051025ND
2019-02-04CA3000585_001_001-201905091035ND
2019-02-04CA3010004_DST_801-202011100900ND
2019-02-04CA3010027_020_020-202101181030ND
2019-02-05CA1910205_072_072-202012020900ND
2019-02-05CA1910205_072_072-202211301605ND
2019-02-05CA3000618_001_001-202107011110ND
2019-02-05CA3010001_110_110-201904171210ND
2019-02-05CA3010010_007_007-202004150855ND
2019-02-06CA1910205_072_072-202112090936ND
2019-02-06CA3010018_004_004-202008241335ND
2019-02-07CA3010010_001_001-201907181025ND
2019-02-07CA3010018_031_031-201908201130ND
2019-02-11CA1910179_053_053-201907251100ND
2019-02-11CA1910205_072_072-202010201017ND
2019-02-11CA3000519_005_005-202104081045ND
2019-02-11CA3000519_005_005-202207050940ND
2019-02-11CA3000585_DST_801-201910030930ND
2019-02-11CA3010004_DST_805-202108100925ND
2019-02-19CA1910179_053_053-202108191329ND
2019-02-19CA3000519_005_005-202005051010ND
2019-02-19CA3010004_014_014-202011100815ND
2019-02-19CA3010004_DST_801-201908130830ND
2019-02-19CA3010017_DST_801-202208021040ND
2019-02-19CA3010037_003_003-202109301220ND
2019-02-20CA1910205_072_072-202111300852ND
2019-02-20CA3010004_014_014-202207180940ND
2019-02-20CA3010018_004_004-202001131210ND
2019-11-04CA3010001_087_087-202006172100ND
2019-11-04CA3010035_005_005-201904291010ND
2020-01-03CA1910205_072_072-202210260919ND
2020-01-07CA3000519_005_005-202207050940ND
2020-01-07CA3010035_DST_813-202108100835ND
2020-01-30CA3010004_006_006-201907090950ND
2020-01-30CA3010004_006_006-202003020900ND
2020-01-30CA3010004_012_012-202008041250ND
2020-01-31CA1910205_075_075-202108260933ND
2020-01-31CA3000618_001_001-202104121220ND
2020-01-31CA3010037_004_004-201910231100ND
2020-02-03CA3010004_008_008-202207180820ND
2020-02-03CA3010027_009_009-202001210925ND
2020-02-03CA3010035_DST_818-202208100740ND
2020-02-04CA3010001_096_096-202010140940ND
2020-02-04CA3010010_001_001-201903200945ND
2020-02-04CA3010010_001_001-202204261020ND
2020-02-04CA3010037_003_003-202001221125ND
2020-02-05CA1910205_072_072-202012190950ND
2020-02-05CA3000585_001_001-201906241020ND
2020-02-05CA3010004_012_012-201902260950ND
2020-02-05CA3010004_014_014-202202161230ND
2020-02-05CA3010008_DST_801-202008171310ND
2020-02-06CA1910179_053_053-202210201202ND
2020-02-06CA1910205_072_072-202112090936ND
2020-02-06CA3000519_005_005-201908221045ND
2020-02-10CA1910205_072_072-202110191045ND
2020-02-10CA3000519_005_005-202007071000ND
2020-02-10CA3010001_087_087-201908070950ND
2020-02-10CA3010010_DST_807-202211011025ND
2020-02-12CA1910086_011_011-202107211029ND
2020-02-12CA3010004_007_007-202011100840ND
2020-02-12CA3010017_DST_801-202208021040ND
2020-02-12CA3010017_DST_802-202005051025ND
2020-11-04CA3000519_005_005-202002041035ND
2020-11-04CA3010023_DST_801-202110121448ND
2021-02-10CA1910179_053_053-202212011028ND
2021-02-10CA3000519_005_005-201911071310ND
2021-02-11CA1910179_053_053-202105040530ND
2021-02-11CA1910179_053_053-202205040857ND
2021-02-11CA3000519_001_001-202005211100ND
2021-02-11CA3010004_006_006-202108020830ND
2021-02-12CA3010018_005_005-201911131145ND
2021-02-17CA3000519_005_005-202108031005ND
2021-02-17CA3000585_001_001-201904010925ND
2021-02-17CA3010018_DST_801-202010191230ND
2021-02-18CA1910205_075_075-201906101035ND
2021-02-18CA3010001_110_110-202107060905ND
2021-02-18CA3010004_DST_805-201908131045ND
2021-02-18CA3010004_DST_805-202008110820ND
2021-02-19CA3000519_005_005-201908221045ND
2021-02-19CA3010001_087_087-202110041035ND
2021-02-22CA1910205_072_072-202012190950ND
2021-02-22CA3000519_005_005-202005051010ND
2021-02-22CA3000519_005_005-202207050940ND
2021-02-22CA3010018_029_029-201902251132ND
2021-02-23CA1910179_053_053-202009031658ND
2021-02-23CA3000519_005_005-202007071000ND
2021-02-23CA3000519_005_005-202110211000ND
2021-02-23CA3010017_DST_802-202105041138ND
2021-02-23CA3010023_DST_808-202104131233ND
2022-01-03CA1910124_025_025-202105181010ND
2022-01-03CA3010004_010_010-202007271035ND
2022-01-03CA3010010_021_021-202210131300ND
2022-01-03CA3010035_003_003-202008041050ND
2022-01-04CA3010004_DST_806-201911130940ND
2022-01-04CA3010010_001_001-201903200945ND
2022-01-04CA3010018_028_028-202109201440ND
2022-01-06CA1910205_075_075-202108260933ND
2022-01-06CA3000519_005_005-202002041035ND
2022-01-06CA3000618_001_001-202104121220ND
2022-01-06CA3010023_DST_801-202110121448ND
2022-01-10CA1910205_072_072-202211301605ND
2022-01-10CA3000519_005_005-202108031005ND
2022-01-10CA3010001_088_088-201910091105ND
2022-01-10CA3010001_088_088-202010141240ND
2022-01-11CA1910205_072_072-202112090936ND
2022-01-11CA3010004_DST_805-202005120940ND
2022-01-13CA3000585_001_001-202101250950ND
2022-01-13CA3010004_DST_803-201911130925ND
2022-01-13CA3010037_004_004-202202071035ND
2022-01-18CA1910179_053_053-201907251100ND
2022-01-18CA1910179_053_053-202108191329ND
2022-01-18CA1910205_072_072-202210260919ND
2022-01-18CA3000519_005_005-202005051010ND
2022-01-18CA3010010_DST_808-202008111140ND
2022-01-18CA3010035_DST_813-202208100935ND
2022-01-19CA3010008_004_004-202101041145ND
2022-01-19CA3010010_007_007-202102031140ND
2022-01-19CA3010018_005_005-202109201410ND
2022-01-19CA3010037_004_004-202210191005ND
2022-01-27CA3000519_005_005-202108031005ND
2022-07-27CA3000618_001_001-201901021100ND
2022-07-27CA3010004_DST_806-202211071124ND
2022-08-24CA1910205_072_072-202011040830ND
2022-08-24CA3010010_DST_808-202005051205ND
2023-03-15CA1500341_005_005-202308231200ND
2023-03-15CA1910098_032_032-202310021101ND
2023-03-15CA3310005_034_034-202309211130ND
2023-03-15CA3310006_016_016-202304171030ND
2023-03-20CA1500407_007_007-202302231300ND
2023-03-20CA1510033_026_026-202312131230ND
2023-03-20CA3310009_063_063-202307050850ND
2023-03-21CA1500407_007_007-202302231300ND
2023-03-21CA1500407_007_007-202312191436ND
2023-03-21CA1500407_DST_901-202312051419ND
2023-03-21CA1510033_016_016-202310160925ND
2023-03-21CA1510033_040_040-202307251345ND
2023-03-21CA1910124_051_051-202309190958ND
2023-03-21CA1910126_032_032-202301111027ND
2023-03-21CA1910126_032_032-202310121121ND
2023-03-21CA3610038_044_044-202311220900ND
2023-03-22CA1500407_DST_901-202309071318ND
2023-03-22CA1500407_DST_901-202312051419ND
2023-03-22CA3310009_063_063-202301030720ND
2023-03-22CA3610038_044_044-202311070800ND
2023-03-22CA3610038_044_044-202311220900ND
2023-03-22CA3610038_044_044-202312010945ND
2023-03-22CA4910020_DST_037-202305081028ND
2023-03-23CA1510033_016_016-202308151223ND
2023-03-23CA1510033_026_026-202310031232ND
2023-03-23CA1910124_051_051-202308010933ND
2023-03-23CA4910020_DST_031-202311011033ND
2023-09-21CA1910124_051_051-202305090838ND