Know Your Environment. Protect Your Health.

Nitrate

City of Arp

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.00505 ppm21ND - 0.0101 ppm
20190.0252 ppm220.0232 ppm - 0.0272 ppm
20200.0261 ppm220.0237 ppm - 0.0284 ppm
20210.0247 ppm220.0177 ppm - 0.0317 ppm
20220.0213 ppm220.0149 ppm - 0.0277 ppm
20230.0265 ppm220.0233 ppm - 0.0297 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
2018-03-26Q1812082004ND
2018-03-26Q18120820120.0101 ppm
2019-03-20Q19116570020.0232 ppm
2019-03-20Q19116570050.0272 ppm
2020-12-01Q20475790070.0284 ppm
2020-12-01Q20475790080.0237 ppm
2021-06-10Q21152620050.0317 ppm
2021-06-10Q21152620060.0177 ppm
2022-03-30Q22099800030.0277 ppm
2022-03-30Q22099800040.0149 ppm
2023-02-23Q23076300040.0233 ppm
2023-06-01Q23205240030.0297 ppm