Know Your Environment. Protect Your Health.

Nitrate

Firgrove Mutual Inc

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

60

Samples

0

Samples exceeding legal limit (MCL)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.58 ppm1311ND - 3.20 ppm
20191.42 ppm129ND - 2.97 ppm
2020N/A00N/A
20211.40 ppm1210ND - 2.82 ppm
20221.57 ppm1210ND - 3.15 ppm
20231.42 ppm119ND - 2.98 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

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-05-080.900 ppm
2018-05-083.20 ppm
2018-06-051.28 ppm
2018-07-090.480 ppm
2018-07-092.13 ppm
2018-07-092.84 ppm
2018-07-093.09 ppm
2018-07-09ND
2018-07-090.960 ppm
2018-07-092.38 ppm
2018-07-090.550 ppm
2018-07-09ND
2018-12-192.71 ppm
2019-05-082.91 ppm
2019-05-080.900 ppm
2019-05-301.15 ppm
2019-07-02ND
2019-07-020.500 ppm
2019-07-022.38 ppm
2019-07-021.01 ppm
2019-07-02ND
2019-07-02ND
2019-07-022.32 ppm
2019-10-012.86 ppm
2019-12-302.97 ppm
2021-04-2041021370.830 ppm
2021-04-2241063242.41 ppm
2021-04-2241060880.440 ppm
2021-04-2241092291.15 ppm
2021-04-2941091342.30 ppm
2021-05-034114447ND
2021-05-0341151050.530 ppm
2021-05-0341141700.930 ppm
2021-05-0441151082.82 ppm
2021-05-2641226352.74 ppm
2021-06-154131628ND
2021-10-1341916502.70 ppm
2022-03-0442576962.82 ppm
2022-03-2842638611.08 ppm
2022-03-2842638630.860 ppm
2022-03-2842638622.43 ppm
2022-03-2842688880.940 ppm
2022-04-2042744602.35 ppm
2022-05-1042869723.06 ppm
2022-05-104281421ND
2022-05-1142813750.520 ppm
2022-06-074293517ND
2022-06-1042967183.15 ppm
2022-06-1042967171.62 ppm
2023-03-2844400852.52 ppm
2023-03-2844400871.26 ppm
2023-03-2844400840.220 ppm
2023-03-284440086ND
2023-03-2944400882.97 ppm
2023-03-2944400550.960 ppm
2023-04-1444424982.48 ppm
2023-05-164454407ND
2023-05-1644544080.530 ppm
2023-06-0644663862.98 ppm
2023-06-0644663871.72 ppm