Know Your Environment. Protect Your Health.

Nitrate and nitrite

Mount Kisco Water Department

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
20210.0790 ppm220.0780 ppm - 0.0800 ppm
20220.0218 ppm52ND - 0.0560 ppm
20230.934 ppm64ND - 5.00 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
2018-06-28420-138864-4-NITND
2018-06-28420-138864-1-NITND
2019-07-02420-156259-4-NITND
2019-07-02420-156259-5-NITND
2020-08-28420-179605-1-NITND
2020-08-28420-179605-2-NITND
2021-06-22420-200400-1-NIT0.0780 ppm
2021-06-22420-200400-2-NIT0.0800 ppm
2022-06-16420-226818-2-NIT0.0560 ppm
2022-06-16420-226818-1-NIT0.0530 ppm
2022-09-13AY16356-NITND
2022-09-13AY16358-NITND
2022-09-13AY16360-NITND
2023-01-24AZ01477-NIT0.0812 ppm
2023-05-10AZ08476-NITND
2023-05-10AZ08475-NIT5.00 ppm
2023-08-16AZ15166-NITND
2023-08-16AZ15164-NIT0.271 ppm
2023-08-16AZ15162-NIT0.253 ppm