Know Your Environment. Protect Your Health.

Nitrate and nitrite

Wild Oaks Water Company

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

12

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND40ND
2021ND10ND
2022ND10ND
20230.231 ppm42ND - 0.869 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

ppm = parts per million

All test results

Date Lab ID Result
2018-09-21420-143037-1-NITND
2019-10-09420-161662-1NITND
2020-02-13420-167586-1NITND
2020-04-16420-170686-1NITND
2020-07-27420-177003-5NITND
2020-10-14420-183110-9NITND
2021-10-25420-209633-1-NITND
2022-12-1322L1990-01-NITND
2023-05-03AZ08003-NITND
2023-05-03AZ08005-NITND
2023-10-1223J1783-02-NIT0.0550 ppm
2023-11-02AZ20329-NIT0.869 ppm