Know Your Environment. Protect Your Health.

Nitrate and nitrite

Route 66 Homes

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.230 ppm220.140 ppm - 0.320 ppm
20190.245 ppm220.150 ppm - 0.340 ppm
20200.159 ppm220.148 ppm - 0.169 ppm
20210.126 ppm110.126 ppm
20220.112 ppm110.112 ppm
20230.121 ppm110.121 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
2018-11-20AD358960.140 ppm
2018-11-20AD358970.320 ppm
2019-11-13AD582500.150 ppm
2019-11-13AD582510.340 ppm
2020-11-0920181140.169 ppm
2020-11-0920181130.148 ppm
2021-11-2221196250.126 ppm
2022-11-0922212300.112 ppm
2023-11-0923183540.121 ppm