Know Your Environment. Protect Your Health.

Arsenic

Rancho Marina

Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.

 

145

Samples

99

Samples exceeding legal limit (MCL)

118

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201819.7 ppb2017ND - 42.0 ppb
201917.9 ppb40402.00 ppb - 32.0 ppb
202013.6 ppb4831ND - 34.0 ppb
202122.0 ppb3730ND - 48.0 ppb
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.004 ppb

The EWG Health Guideline of 0.004 ppb for arsenic 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 cancer.

EPA Maximum Contaminant
Level (MCL): 10 ppb

The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-03CA3400149_001_001-20180103160029.0 ppb
2018-01-17CA3400149_010_010-20180117170035.0 ppb
2018-02-07CA3400149_010_010-20180207130031.0 ppb
2018-03-08CA3400149_010_010-20180308110042.0 ppb
2018-04-19CA3400149_010_010-20180419140830.0 ppb
2018-07-11CA3400149_010_010-20180711140027.0 ppb
2018-08-08CA3400149_010_010-20180808140027.0 ppb
2018-09-19CA3400149_010_010-20180919133026.0 ppb
2018-10-10CA3400149_010_010-20181010133020.0 ppb
2018-10-10CA3400149_012_012-2018101013303.30 ppb
2018-10-10CA3400149_012_013-201810101330ND
2018-10-10CA3400149_011_011-2018101013306.00 ppb
2018-11-07CA3400149_011_011-20181107095020.0 ppb
2018-11-07CA3400149_012_012-2018110709507.40 ppb
2018-11-07CA3400149_012_013-201811070950ND
2018-11-07CA3400149_010_010-20181107095027.0 ppb
2018-12-20CA3400149_011_011-20181220103035.0 ppb
2018-12-20CA3400149_012_012-2018122010306.60 ppb
2018-12-20CA3400149_012_013-201812201030ND
2018-12-20CA3400149_010_010-20181220103021.0 ppb
2019-01-17CA3400149_012_012-2019011713009.90 ppb
2019-01-17CA3400149_012_013-2019011713002.00 ppb
2019-01-17CA3400149_010_010-20190117130028.0 ppb
2019-01-17CA3400149_011_011-20190117130032.0 ppb
2019-02-27CA3400149_010_010-20190227113032.0 ppb
2019-02-27CA3400149_012_012-20190227113013.0 ppb
2019-02-27CA3400149_012_013-20190227113012.0 ppb
2019-02-27CA3400149_011_011-20190227113030.0 ppb
2019-03-11CA3400149_011_011-20190311101525.0 ppb
2019-03-11CA3400149_012_013-20190311101511.0 ppb
2019-03-11CA3400149_010_010-20190311101528.0 ppb
2019-03-11CA3400149_012_012-20190311101513.0 ppb
2019-05-08CA3400149_012_013-20190508103511.0 ppb
2019-05-08CA3400149_010_010-20190508103528.0 ppb
2019-05-08CA3400149_011_011-2019050810305.30 ppb
2019-05-08CA3400149_012_012-20190508103015.0 ppb
2019-06-18CA3400149_011_011-2019061812009.60 ppb
2019-06-18CA3400149_010_010-20190618120027.0 ppb
2019-06-18CA3400149_012_013-20190618120012.0 ppb
2019-06-18CA3400149_012_012-2019061812007.30 ppb
2019-08-09CA3400149_012_012-20190809103019.0 ppb
2019-08-09CA3400149_012_013-20190809103015.0 ppb
2019-08-09CA3400149_010_010-20190809103027.0 ppb
2019-08-09CA3400149_011_011-20190809103015.0 ppb
2019-09-12CA3400149_012_013-20190912100014.0 ppb
2019-09-12CA3400149_012_012-20190912100017.0 ppb
2019-09-12CA3400149_011_011-20190912100013.0 ppb
2019-09-12CA3400149_010_010-20190912100026.0 ppb
2019-10-24CA3400149_011_011-20191024093013.0 ppb
2019-10-24CA3400149_012_012-20191024093016.0 ppb
2019-10-24CA3400149_012_013-20191024093014.0 ppb
2019-10-24CA3400149_010_010-20191024093025.0 ppb
2019-11-06CA3400149_010_010-20191106144519.0 ppb
2019-11-06CA3400149_012_012-20191106144519.0 ppb
2019-11-06CA3400149_012_013-20191106144518.0 ppb
2019-11-06CA3400149_011_011-20191106144515.0 ppb
2019-12-19CA3400149_010_010-20191219100029.0 ppb
2019-12-19CA3400149_011_011-20191219100015.0 ppb
2019-12-19CA3400149_012_012-20191219100018.0 ppb
2019-12-19CA3400149_012_013-20191219100016.0 ppb
2020-01-08CA3400149_010_010-20200108143028.0 ppb
2020-01-08CA3400149_012_013-202001081430ND
2020-01-08CA3400149_012_012-202001081430ND
2020-01-08CA3400149_011_011-202001081430ND
2020-02-05CA3400149_011_011-202002051230ND
2020-02-05CA3400149_012_013-202002051230ND
2020-02-05CA3400149_010_010-20200205123027.0 ppb
2020-02-05CA3400149_012_012-202002051230ND
2020-03-04CA3400149_011_011-202003041430ND
2020-03-04CA3400149_012_012-2020030414302.30 ppb
2020-03-04CA3400149_010_010-20200304143031.0 ppb
2020-03-04CA3400149_012_013-202003041430ND
2020-04-06CA3400149_012_012-20200406113019.0 ppb
2020-04-06CA3400149_012_013-202004061130ND
2020-04-06CA3400149_010_010-20200406113028.0 ppb
2020-04-06CA3400149_011_011-20200406113018.0 ppb
2020-05-05CA3400149_012_013-2020050509002.60 ppb
2020-05-05CA3400149_010_010-20200505090016.0 ppb
2020-05-05CA3400149_012_012-20200505090025.0 ppb
2020-05-05CA3400149_011_011-20200505090022.0 ppb
2020-06-02CA3400149_012_013-2020060214307.20 ppb
2020-06-02CA3400149_011_011-20200602143024.0 ppb
2020-06-02CA3400149_012_012-20200602143023.0 ppb
2020-06-02CA3400149_010_010-20200602143025.0 ppb
2020-07-08CA3400149_011_011-20200708143022.0 ppb
2020-07-08CA3400149_010_010-20200708143025.0 ppb
2020-07-08CA3400149_012_012-20200708143022.0 ppb
2020-07-08CA3400149_012_013-20200708143012.0 ppb
2020-08-05CA3400149_011_011-202008051430ND
2020-08-05CA3400149_010_010-20200805143032.0 ppb
2020-08-05CA3400149_012_012-202008051430ND
2020-08-05CA3400149_012_013-2020080514308.30 ppb
2020-09-03CA3400149_011_011-202009031215ND
2020-09-03CA3400149_010_010-20200903121529.0 ppb
2020-09-03CA3400149_012_012-202009031215ND
2020-09-03CA3400149_012_013-202009031215ND
2020-10-07CA3400149_012_012-2020100714307.60 ppb
2020-10-07CA3400149_010_010-20201007143028.0 ppb
2020-10-07CA3400149_012_013-202010071430ND
2020-10-07CA3400149_011_011-202010071430ND
2020-11-03CA3400149_010_010-20201103153030.0 ppb
2020-11-03CA3400149_011_011-20201103153013.0 ppb
2020-11-03CA3400149_012_013-202011031530ND
2020-11-03CA3400149_012_012-20201103153022.0 ppb
2020-12-15CA3400149_010_010-20201215100034.0 ppb
2020-12-15CA3400149_012_012-20201215100033.0 ppb
2020-12-15CA3400149_011_011-20201215100032.0 ppb
2020-12-15CA3400149_012_013-2020121510005.30 ppb
2021-01-21CA3400149_010_010-20210121110015.0 ppb
2021-01-21CA3400149_011_011-20210121110031.0 ppb
2021-01-21CA3400149_012_013-20210121110031.0 ppb
2021-01-21CA3400149_012_012-20210121110030.0 ppb
2021-02-03CA3400149_010_010-20210203170029.0 ppb
2021-03-03CA3400149_012_013-20210303170024.0 ppb
2021-03-03CA3400149_012_012-20210303170044.0 ppb
2021-03-03CA3400149_010_010-20210303170027.0 ppb
2021-03-03CA3400149_011_011-20210303170047.0 ppb
2021-04-19CA3400149_010_010-20210419123030.0 ppb
2021-04-19CA3400149_011_011-20210419123048.0 ppb
2021-04-19CA3400149_012_012-20210419123048.0 ppb
2021-04-19CA3400149_012_013-20210419123025.0 ppb
2021-05-05CA3400149_010_010-20210505153030.0 ppb
2021-05-05CA3400149_012_013-20210505153025.0 ppb
2021-06-09CA3400149_011_011-20210609140029.0 ppb
2021-06-09CA3400149_010_010-20210609140031.0 ppb
2021-06-09CA3400149_012_012-20210609140030.0 ppb
2021-06-09CA3400149_012_013-20210609140027.0 ppb
2021-07-08CA3400149_010_010-20210708083029.0 ppb
2021-07-08CA3400149_012_013-20210708083028.0 ppb
2021-07-08CA3400149_012_012-20210708083028.0 ppb
2021-07-08CA3400149_011_011-20210708083027.0 ppb
2021-08-04CA3400149_010_010-20210804093029.0 ppb
2021-08-04CA3400149_011_011-202108040930ND
2021-08-04CA3400149_012_013-202108040930ND
2021-08-04CA3400149_012_012-202108040930ND
2021-09-09CA3400149_010_010-202109091100ND
2021-09-09CA3400149_011_011-202109091100ND
2021-09-09CA3400149_012_013-20210909110027.0 ppb
2021-09-09CA3400149_012_012-202109091100ND
2021-10-07CA3400149_011_011-2021100712303.00 ppb
2021-10-07CA3400149_012_012-2021100712302.60 ppb
2021-10-07CA3400149_012_012-2021100712303.50 ppb
2021-10-07CA3400149_010_010-20211007123031.0 ppb
2021-10-07CA3400149_011_011-2021100712303.30 ppb
2021-10-07CA3400149_012_013-202110071230ND