Know Your Environment. Protect Your Health.

Nitrate

Merrill Gardens Iris Canyon Ws

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.0778 ppm91ND - 0.700 ppm
20200.0778 ppm92ND - 0.600 ppm
20210.280 ppm51ND - 1.40 ppm
20220.240 ppm51ND - 1.20 ppm
2023ND50ND

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
2019-03-19CA2702816_003_003-201903191204ND
2019-03-19CA2702816_005_005-201903191216ND
2019-03-19CA2702816_001_001-201903191147ND
2019-03-19CA2702816_002_002-201903191154ND
2019-07-18CA2702816_001_001-2019071811000.700 ppm
2019-07-18CA2702816_005_005-201907181145ND
2019-07-18CA2702816_002_002-201907181045ND
2019-07-18CA2702816_003_003-201907181122ND
2019-12-10CA2702816_004_004-201912101301ND
2020-07-07CA2702816_001_001-2020070711340.1000 ppm
2020-07-07CA2702816_005_005-202007071225ND
2020-07-07CA2702816_003_003-202007071209ND
2020-07-07CA2702816_002_002-202007071154ND
2020-08-25CA2702816_004_004-202008251035ND
2020-12-08CA2702816_002_002-202012081150ND
2020-12-08CA2702816_001_001-2020120812070.600 ppm
2020-12-08CA2702816_005_005-202012081240ND
2020-12-08CA2702816_003_003-202012081220ND
2021-05-20CA2702816_001_001-2021052010321.40 ppm
2021-05-20CA2702816_002_002-202105201046ND
2021-05-20CA2702816_005_005-202105201109ND
2021-05-20CA2702816_004_004-202105201139ND
2021-05-20CA2702816_003_003-202105201057ND
2022-12-27CA2702816_002_002-202212271110ND
2022-12-27CA2702816_005_005-202212271035ND
2022-12-27CA2702816_001_001-2022122710501.20 ppm
2022-12-27CA2702816_003_003-202212271125ND
2022-12-29CA2702816_004_004-202212290950ND
2023-12-21CA2702816_005_005-202312211230ND
2023-12-21CA2702816_002_002-202312211145ND
2023-12-21CA2702816_004_004-202312211220ND
2023-12-21CA2702816_001_001-202312211205ND
2023-12-21CA2702816_003_003-202312211155ND