Know Your Environment. Protect Your Health.

Nitrate

Hidden Valley Lake Community Services District

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.11 ppm440.540 ppm - 1.80 ppm
20191.43 ppm330.800 ppm - 1.90 ppm
20200.867 ppm32ND - 1.60 ppm
20211.01 ppm330.740 ppm - 1.30 ppm
20220.813 ppm330.500 ppm - 1.30 ppm
20231.38 ppm330.740 ppm - 1.80 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
2018-01-25CA1710015_003_003-2018012509340.780 ppm
2018-12-12CA1710015_002_002-2018121210201.80 ppm
2018-12-12CA1710015_003_003-2018121210500.540 ppm
2018-12-12CA1710015_004_004-2018121210251.30 ppm
2019-11-26CA1710015_002_002-2019112609001.90 ppm
2019-11-26CA1710015_003_003-2019112608470.800 ppm
2019-11-26CA1710015_004_004-2019112608241.60 ppm
2020-12-09CA1710015_004_004-2020120909221.000 ppm
2020-12-09CA1710015_003_003-202012090911ND
2020-12-09CA1710015_002_002-2020120909161.60 ppm
2021-12-22CA1710015_004_004-2021122208040.990 ppm
2021-12-22CA1710015_002_002-2021122208071.30 ppm
2021-12-22CA1710015_003_003-2021122208150.740 ppm
2022-12-07CA1710015_003_003-2022120708000.640 ppm
2022-12-07CA1710015_004_004-2022120708180.500 ppm
2022-12-07CA1710015_002_002-2022120708101.30 ppm
2023-12-20CA1710015_004_004-2023122009121.60 ppm
2023-12-20CA1710015_002_002-2023122009241.80 ppm
2023-12-20CA1710015_003_003-2023122009330.740 ppm