Know Your Environment. Protect Your Health.

Nitrate

Gleanings For The Hungry

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

217

Samples

48

Samples exceeding legal limit (MCL)

208

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201817.7 ppm37372.20 ppm - 47.0 ppm
201919.3 ppm3231ND - 46.0 ppm
202016.1 ppm2825ND - 48.0 ppm
202111.3 ppm4442ND - 50.0 ppm
20229.20 ppm4241ND - 49.0 ppm
20234.25 ppm3432ND - 9.30 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL): 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-01-18CA5402047_021_021-2018011811053.40 ppm
2018-01-18CA5402047_018_018-20180118110043.0 ppm
2018-01-18CA5402047_017_017-2018011810505.30 ppm
2018-02-08CA5402047_021_021-2018020814353.40 ppm
2018-02-08CA5402047_018_018-20180208143047.0 ppm
2018-03-20CA5402047_017_017-2018032011109.00 ppm
2018-03-20CA5402047_018_018-20180320115041.0 ppm
2018-03-20CA5402047_021_021-2018032013503.20 ppm
2018-04-24CA5402047_017_017-2018042412305.60 ppm
2018-04-24CA5402047_018_018-20180424133543.0 ppm
2018-04-24CA5402047_021_021-2018042413403.30 ppm
2018-05-11CA5402047_018_018-20180511080041.0 ppm
2018-05-11CA5402047_021_021-2018051109303.30 ppm
2018-05-11CA5402047_017_017-2018051107509.40 ppm
2018-06-22CA5402047_018_018-20180622140041.0 ppm
2018-06-22CA5402047_017_017-2018062213556.60 ppm
2018-06-22CA5402047_021_021-2018062214053.80 ppm
2018-07-04CA5402047_018_018-20180704101641.0 ppm
2018-07-04CA5402047_017_017-2018070410102.70 ppm
2018-07-04CA5402047_021_021-2018070410393.80 ppm
2018-08-09CA5402047_017_017-2018080911027.20 ppm
2018-08-09CA5402047_018_018-20180809111340.0 ppm
2018-08-09CA5402047_021_021-2018080911273.00 ppm
2018-09-20CA5402047_021_021-2018092010253.20 ppm
2018-09-20CA5402047_017_017-2018092010152.20 ppm
2018-09-20CA5402047_018_018-20180920102043.0 ppm
2018-09-24CA5402047_017_017-2018092410252.70 ppm
2018-09-24CA5402047_018_018-20180924103842.0 ppm
2018-10-09CA5402047_017_017-2018100913293.00 ppm
2018-10-09CA5402047_018_018-20181009133642.0 ppm
2018-10-09CA5402047_021_021-2018100913433.60 ppm
2018-11-05CA5402047_018_018-20181105132742.0 ppm
2018-11-05CA5402047_021_021-2018110514593.80 ppm
2018-11-05CA5402047_017_017-2018110513398.60 ppm
2018-12-05CA5402047_021_021-2018120510533.60 ppm
2018-12-05CA5402047_017_017-2018120510463.50 ppm
2018-12-05CA5402047_018_018-20181205103742.0 ppm
2019-01-08CA5402047_018_018-20190108094541.0 ppm
2019-01-08CA5402047_021_021-20190108100016.0 ppm
2019-01-08CA5402047_017_017-2019010809505.50 ppm
2019-01-15CA5402047_021_021-2019011514353.80 ppm
2019-02-05CA5402047_017_017-2019020513342.90 ppm
2019-02-05CA5402047_018_018-20190205132045.0 ppm
2019-03-11CA5402047_018_018-20190311133543.0 ppm
2019-03-11CA5402047_017_017-2019031113423.60 ppm
2019-03-11CA5402047_021_021-2019031113471.10 ppm
2019-04-11CA5402047_021_021-2019041112003.20 ppm
2019-04-11CA5402047_017_017-2019041111456.90 ppm
2019-04-11CA5402047_018_018-20190411115041.0 ppm
2019-05-08CA5402047_017_017-2019050816054.80 ppm
2019-05-08CA5402047_018_018-20190508161041.0 ppm
2019-06-11CA5402047_018_018-20190611140041.0 ppm
2019-06-11CA5402047_017_017-2019061114306.00 ppm
2019-07-12CA5402047_021_021-2019071210208.00 ppm
2019-07-12CA5402047_017_017-2019071210102.50 ppm
2019-07-12CA5402047_018_018-20190712101542.0 ppm
2019-08-19CA5402047_021_021-2019081913458.60 ppm
2019-08-19CA5402047_017_017-2019081913356.60 ppm
2019-08-19CA5402047_018_018-20190819134042.0 ppm
2019-09-26CA5402047_017_017-2019092610446.50 ppm
2019-09-26CA5402047_021_021-201909261100ND
2019-09-26CA5402047_018_018-20190926105044.0 ppm
2019-10-31CA5402047_017_017-2019103111457.20 ppm
2019-10-31CA5402047_018_018-20191031115046.0 ppm
2019-10-31CA5402047_021_021-2019103113052.90 ppm
2019-11-27CA5402047_017_017-2019112714406.90 ppm
2019-11-27CA5402047_018_018-20191127144542.0 ppm
2019-12-19CA5402047_018_018-20191219151045.0 ppm
2019-12-19CA5402047_017_017-2019121915002.20 ppm
2020-01-29CA5402047_017_017-2020012910209.10 ppm
2020-01-29CA5402047_018_018-20200129103042.0 ppm
2020-03-23CA5402047_018_018-20200323113042.0 ppm
2020-03-23CA5402047_017_017-2020032311204.80 ppm
2020-04-15CA5402047_017_017-2020041510306.40 ppm
2020-04-15CA5402047_018_018-20200415104045.0 ppm
2020-05-15CA5402047_018_018-20200515082043.0 ppm
2020-05-15CA5402047_022_022-2020051509351.30 ppm
2020-05-15CA5402047_017_017-2020051508156.80 ppm
2020-05-22CA5402047_022_022-2020052214451.80 ppm
2020-06-15CA5402047_017_017-2020061514557.80 ppm
2020-06-15CA5402047_022_022-2020061515102.60 ppm
2020-07-15CA5402047_017_017-2020071514002.10 ppm
2020-07-15CA5402047_022_022-2020071514155.70 ppm
2020-08-05CA5402047_017_017-2020080513309.70 ppm
2020-08-05CA5402047_022_022-202008051350ND
2020-09-22CA5402047_018_018-20200922102046.0 ppm
2020-09-22CA5402047_017_017-2020092210156.70 ppm
2020-09-22CA5402047_022_022-202009221035ND
2020-10-19CA5402047_022_022-202010191420ND
2020-10-19CA5402047_018_018-20201019140548.0 ppm
2020-10-19CA5402047_017_017-2020101914009.50 ppm
2020-11-10CA5402047_018_018-20201110133546.0 ppm
2020-11-10CA5402047_017_017-2020111013306.80 ppm
2020-11-10CA5402047_022_022-2020111013400.480 ppm
2020-12-17CA5402047_017_017-2020121714207.50 ppm
2020-12-17CA5402047_018_018-20201217142548.0 ppm
2020-12-28CA5402047_022_022-2020122814052.10 ppm
2021-01-19CA5402047_018_018-20210119133549.0 ppm
2021-01-19CA5402047_022_022-2021011913452.20 ppm
2021-01-19CA5402047_017_017-2021011913308.30 ppm
2021-01-19CA5402047_021_021-2021011913400.640 ppm
2021-02-17CA5402047_017_017-2021021715505.80 ppm
2021-02-17CA5402047_021_021-2021021716000.650 ppm
2021-02-17CA5402047_022_022-2021021716051.60 ppm
2021-03-16CA5402047_017_017-2021031613006.60 ppm
2021-03-16CA5402047_021_021-2021031613100.680 ppm
2021-03-16CA5402047_022_022-2021031613152.00 ppm
2021-03-16CA5402047_018_018-20210316130546.0 ppm
2021-04-21CA5402047_017_017-2021042114005.80 ppm
2021-04-21CA5402047_018_018-20210421140542.0 ppm
2021-04-21CA5402047_021_021-2021042114100.640 ppm
2021-04-21CA5402047_022_022-2021042114153.40 ppm
2021-05-07CA5402047_017_017-2021050713306.60 ppm
2021-05-07CA5402047_021_021-2021050713450.780 ppm
2021-05-07CA5402047_018_018-20210507133544.0 ppm
2021-05-07CA5402047_022_022-2021050713404.60 ppm
2021-06-24CA5402047_017_017-2021062414257.10 ppm
2021-06-24CA5402047_022_022-202106241440ND
2021-06-24CA5402047_021_021-2021062414350.870 ppm
2021-07-21CA5402047_022_022-2021072114153.20 ppm
2021-07-21CA5402047_017_017-2021072114007.80 ppm
2021-07-21CA5402047_018_018-20210721140549.0 ppm
2021-07-21CA5402047_021_021-2021072114100.800 ppm
2021-08-30CA5402047_018_018-20210830113543.0 ppm
2021-08-30CA5402047_021_021-2021083011400.760 ppm
2021-08-30CA5402047_022_022-2021083011458.60 ppm
2021-08-30CA5402047_017_017-2021083011308.50 ppm
2021-09-20CA5402047_017_017-2021092015108.40 ppm
2021-09-20CA5402047_022_022-202109201455ND
2021-09-20CA5402047_021_021-2021092015000.720 ppm
2021-09-20CA5402047_018_018-20210920151550.0 ppm
2021-10-27CA5402047_017_017-2021102711307.70 ppm
2021-10-27CA5402047_022_022-2021102711452.00 ppm
2021-10-27CA5402047_021_021-2021102711400.890 ppm
2021-11-10CA5402047_021_021-2021111014100.980 ppm
2021-11-10CA5402047_022_022-2021111014151.20 ppm
2021-11-10CA5402047_017_017-2021111014007.10 ppm
2021-12-23CA5402047_021_021-2021122309150.760 ppm
2021-12-23CA5402047_022_022-2021122309100.830 ppm
2021-12-23CA5402047_017_017-2021122309008.30 ppm
2021-12-23CA5402047_018_018-20211223090549.0 ppm
2022-01-25CA5402047_022_022-2022012514151.80 ppm
2022-01-25CA5402047_021_021-2022012514100.650 ppm
2022-01-25CA5402047_017_017-2022012514008.90 ppm
2022-02-23CA5402047_022_022-2022022314302.10 ppm
2022-02-23CA5402047_017_017-2022022314009.30 ppm
2022-02-23CA5402047_018_018-20220223141049.0 ppm
2022-02-23CA5402047_021_021-2022022314400.610 ppm
2022-03-17CA5402047_018_018-20220317100548.0 ppm
2022-03-17CA5402047_022_022-2022031710102.40 ppm
2022-03-17CA5402047_017_017-2022031710002.00 ppm
2022-03-17CA5402047_021_021-2022031710200.550 ppm
2022-04-12CA5402047_017_017-2022041214006.90 ppm
2022-04-12CA5402047_018_018-20220412140548.0 ppm
2022-04-12CA5402047_021_021-2022041214100.720 ppm
2022-04-12CA5402047_022_022-2022041214152.20 ppm
2022-05-27CA5402047_022_022-2022052713153.30 ppm
2022-05-27CA5402047_017_017-2022052713007.40 ppm
2022-05-27CA5402047_021_021-2022052713100.780 ppm
2022-06-29CA5402047_017_017-2022062909407.00 ppm
2022-06-29CA5402047_022_022-2022062909554.40 ppm
2022-06-29CA5402047_021_021-2022062909500.750 ppm
2022-07-25CA5402047_022_022-2022072513456.70 ppm
2022-07-25CA5402047_021_021-2022072513400.890 ppm
2022-07-25CA5402047_017_017-2022072513307.90 ppm
2022-07-25CA5402047_018_018-20220725133548.0 ppm
2022-08-23CA5402047_017_017-2022082313008.60 ppm
2022-08-23CA5402047_021_021-2022082313150.880 ppm
2022-08-23CA5402047_022_022-2022082313109.50 ppm
2022-09-28CA5402047_022_022-20220928150013.0 ppm
2022-09-28CA5402047_017_017-2022092811308.00 ppm
2022-09-28CA5402047_021_021-2022092814300.800 ppm
2022-10-05CA5402047_022_022-2022100510100.340 ppm
2022-10-31CA5402047_021_021-2022103107300.970 ppm
2022-10-31CA5402047_022_022-202210310735ND
2022-10-31CA5402047_017_017-2022103107007.30 ppm
2022-11-21CA5402047_017_017-2022112114307.60 ppm
2022-11-21CA5402047_021_021-2022112114450.700 ppm
2022-11-21CA5402047_018_018-20221121143546.0 ppm
2022-11-21CA5402047_022_022-2022112114400.280 ppm
2022-12-19CA5402047_022_022-2022121914102.40 ppm
2022-12-19CA5402047_017_017-2022121914009.20 ppm
2022-12-19CA5402047_021_021-2022121914150.640 ppm
2023-01-27CA5402047_022_022-2023012710154.00 ppm
2023-01-27CA5402047_017_017-2023012710009.10 ppm
2023-01-27CA5402047_021_021-2023012710100.640 ppm
2023-02-22CA5402047_017_017-2023022214008.90 ppm
2023-02-22CA5402047_022_022-2023022214103.90 ppm
2023-02-22CA5402047_021_021-2023022214150.630 ppm
2023-03-31CA5402047_017_017-2023033113007.30 ppm
2023-03-31CA5402047_021_021-2023033113150.640 ppm
2023-03-31CA5402047_022_022-2023033113105.90 ppm
2023-04-24CA5402047_017_017-2023042410008.70 ppm
2023-04-24CA5402047_021_021-2023042410200.750 ppm
2023-04-24CA5402047_022_022-2023042410308.10 ppm
2023-05-30CA5402047_022_022-2023053010558.10 ppm
2023-05-30CA5402047_017_017-2023053010459.30 ppm
2023-05-30CA5402047_021_021-2023053011000.810 ppm
2023-06-19CA5402047_022_022-202306191425ND
2023-06-19CA5402047_017_017-2023061914152.10 ppm
2023-06-19CA5402047_021_021-2023061914300.870 ppm
2023-07-27CA5402047_017_017-2023072710408.40 ppm
2023-07-27CA5402047_021_021-2023072710550.950 ppm
2023-07-27CA5402047_022_022-2023072710501.80 ppm
2023-08-23CA5402047_021_021-2023082314101.10 ppm
2023-08-23CA5402047_022_022-202308231415ND
2023-08-23CA5402047_017_017-2023082314008.10 ppm
2023-09-28CA5402047_017_017-2023092810007.80 ppm
2023-09-28CA5402047_021_021-2023092810100.860 ppm
2023-09-28CA5402047_022_022-2023092810153.70 ppm
2023-10-30CA5402047_021_021-2023103013400.900 ppm
2023-10-30CA5402047_017_017-2023103013308.10 ppm
2023-10-30CA5402047_022_022-2023103013456.30 ppm
2023-11-27CA5402047_021_021-2023112714501.30 ppm
2023-11-27CA5402047_022_022-2023112715006.80 ppm
2023-12-27CA5402047_021_021-2023122713050.900 ppm
2023-12-27CA5402047_022_022-2023122713107.70 ppm