Know Your Environment. Protect Your Health.

Nitrate

Tesoro Viejo Master Mwc, Inc.

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.

 

59

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND50ND
2020ND90ND
20210.0500 ppm102ND - 0.260 ppm
2022ND220ND
20230.0880 ppm102ND - 0.570 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
2018-08-31CA2010017_002_002-201808310845ND
2018-12-06CA2010017_006_006-201812061040ND
2018-12-12CA2010017_001_001-201812121045ND
2019-03-20CA2010017_001_001-201903200815ND
2019-05-15CA2010017_001_001-201905151345ND
2019-06-12CA2010017_006_006-201906121015ND
2019-08-21CA2010017_002_002-201908210955ND
2019-11-14CA2010017_006_006-201911141100ND
2020-02-19CA2010017_006_006-202002190915ND
2020-05-13CA2010017_006_006-202005131000ND
2020-06-03CA2010017_002_002-202006031215ND
2020-06-09CA2010017_001_001-202006090845ND
2020-06-15CA2010017_002_002-202006151100ND
2020-08-19CA2010017_006_006-202008191005ND
2020-09-16CA2010017_001_001-202009160945ND
2020-11-24CA2010017_006_006-202011241030ND
2020-12-09CA2010017_001_001-202012090945ND
2021-02-17CA2010017_006_006-202102171035ND
2021-02-17CA2010017_006_006-202102171035ND
2021-03-03CA2010017_001_001-202103031050ND
2021-05-12CA2010017_006_006-202105121015ND
2021-06-09CA2010017_001_001-202106090845ND
2021-06-28CA2010017_002_002-202106280955ND
2021-08-18CA2010017_006_006-202108180845ND
2021-09-15CA2010017_001_001-202109151045ND
2021-11-10CA2010017_006_006-2021111010250.260 ppm
2021-12-07CA2010017_001_001-2021120709150.240 ppm
2022-02-16CA2010017_006_006-202202160920ND
2022-03-10CA2010017_001_001-202203100845ND
2022-05-11CA2010017_006_006-202205110945ND
2022-06-08CA2010017_001_001-202206080930ND
2022-06-22CA2010017_001_001-202206220850ND
2022-07-06CA2010017_002_002-202207060900ND
2022-08-10CA2010017_006_006-202208101020ND
2022-09-27CA2010017_001_001-202209270930ND
2022-10-14CA2010017_DST_900-202210140700ND
2022-10-19CA2010017_DST_900-202210190710ND
2022-10-19CA2010017_003_003-202210190815ND
2022-10-24CA2010017_DST_900-202210240925ND
2022-10-24CA2010017_003_003-202210241020ND
2022-11-02CA2010017_DST_900-202211020710ND
2022-11-09CA2010017_003_003-202211091025ND
2022-11-09CA2010017_DST_900-202211090657ND
2022-11-16CA2010017_DST_900-202211160750ND
2022-11-17CA2010017_006_006-202211171045ND
2022-11-21CA2010017_003_003-202211211025ND
2022-11-21CA2010017_DST_900-202211210920ND
2022-11-29CA2010017_DST_900-202211290650ND
2022-12-13CA2010017_001_001-202212131130ND
2023-02-13CA2010017_002_002-2023021306300.310 ppm
2023-02-14CA2010017_006_006-202302141040ND
2023-03-13CA2010017_001_001-2023031312300.570 ppm
2023-05-15CA2010017_006_006-202305151035ND
2023-06-05CA2010017_001_001-202306051040ND
2023-06-20CA2010017_001_001-202306200755ND
2023-08-15CA2010017_006_006-202308151000ND
2023-09-12CA2010017_001_001-202309120840ND
2023-11-21CA2010017_006_006-202311210655ND
2023-12-05CA2010017_001_001-202312050845ND