Know Your Environment. Protect Your Health.

Nitrate

Lazy Nine MUD 1b

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.288 ppm440.170 ppm - 0.510 ppm
20190.400 ppm440.0800 ppm - 0.650 ppm
20200.198 ppm440.180 ppm - 0.230 ppm
20210.160 ppm440.0800 ppm - 0.250 ppm
20220.113 ppm440.0600 ppm - 0.160 ppm
20230.150 ppm440.1000 ppm - 0.180 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
2018-02-15AE139020.210 ppm
2018-05-14AE260510.260 ppm
2018-08-13AE364910.170 ppm
2018-11-19AE463190.510 ppm
2019-02-14AE544850.650 ppm
2019-05-28AE681430.510 ppm
2019-08-20AE794470.360 ppm
2019-11-25AE903080.0800 ppm
2020-03-03AF007430.180 ppm
2020-04-20AF071160.200 ppm
2020-07-23AF203020.230 ppm
2020-10-19AF310220.180 ppm
2021-01-25AF405250.0800 ppm
2021-04-06AF490430.130 ppm
2021-07-07AF608550.180 ppm
2021-10-21AF742750.250 ppm
2022-02-10AF841250.110 ppm
2022-04-26AF943520.120 ppm
2022-08-23AG103740.160 ppm
2022-10-19AG175420.0600 ppm
2023-02-15AG289570.150 ppm
2023-04-11AG361490.180 ppm
2023-07-18AG489120.170 ppm
2023-10-11AG592730.1000 ppm