Know Your Environment. Protect Your Health.

Nitrate and nitrite

City of Palm Valley

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.300 ppm220.0700 ppm - 0.530 ppm
20190.370 ppm110.370 ppm
20200.335 ppm220.0700 ppm - 0.600 ppm
20211.21 ppm111.21 ppm
20221.13 ppm111.13 ppm
20230.850 ppm110.850 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
2018-02-01AE117070.530 ppm
2018-06-12AE293450.0700 ppm
2019-02-20AE549400.370 ppm
2020-03-19AF036790.0700 ppm
2020-08-18AF239660.600 ppm
2021-03-11AF466661.21 ppm
2022-03-03AF873591.13 ppm
2023-02-02AG269770.850 ppm