Know Your Environment. Protect Your Health.

Nitrate and nitrite

Dykeer 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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.05 ppm111.05 ppm
20191.27 ppm111.27 ppm
20202.00 ppm112.00 ppm
20212.00 ppm112.00 ppm
20220.00500 ppm21ND - 0.01000 ppm
20230.993 ppm770.240 ppm - 5.18 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
2018-10-18420-144343-1-NIT1.05 ppm
2019-10-09420-161672-1NIT1.27 ppm
2020-10-12420-182872-1NIT2.00 ppm
2021-10-26420-209728-1-NIT2.00 ppm
2022-05-18420-223914-1-NIT0.01000 ppm
2022-12-1322L1988-01-NITND
2023-01-1223A1303-05-NIT0.480 ppm
2023-04-1923D2193-02-NIT0.250 ppm
2023-05-02AZ07878-NIT0.245 ppm
2023-05-02AZ07876-NIT5.18 ppm
2023-07-1923G2528-10-NIT0.260 ppm
2023-10-11AZ18774-NIT0.296 ppm
2023-10-1323J2005-01-NIT0.240 ppm