Know Your Environment. Protect Your Health.

Nitrate

Liberty City Water Supply Corporation

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)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0551 ppm440.0415 ppm - 0.0686 ppm
20190.0507 ppm440.0377 ppm - 0.0682 ppm
20200.0629 ppm440.0499 ppm - 0.0788 ppm
20210.191 ppm440.0603 ppm - 0.538 ppm
20220.0483 ppm440.0414 ppm - 0.0608 ppm
20230.0440 ppm440.0343 ppm - 0.0547 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
2018-06-14Q18239090040.0686 ppm
2018-06-14Q18239090160.0415 ppm
2018-06-14Q18239090170.0467 ppm
2018-06-14Q18239090030.0635 ppm
2019-03-28Q19126490060.0682 ppm
2019-03-28Q19126490160.0419 ppm
2019-03-28Q19126490170.0550 ppm
2019-03-28Q19126490180.0377 ppm
2020-06-15Q20238250040.0788 ppm
2020-10-13Q20399890140.0580 ppm
2020-10-13Q20399890150.0649 ppm
2020-10-13Q20399890160.0499 ppm
2021-06-24Q21166190040.0913 ppm
2021-11-19Q21325710100.0736 ppm
2021-11-19Q21325710110.538 ppm
2021-11-19Q21325710120.0603 ppm
2022-03-28Q22096080050.0608 ppm
2022-10-24Q22319710110.0417 ppm
2022-10-24Q22319710120.0494 ppm
2022-10-24Q22319710130.0414 ppm
2023-02-16Q23065320010.0389 ppm
2023-06-14Q23226550090.0480 ppm
2023-06-14Q23226550100.0547 ppm
2023-06-14Q23226550110.0343 ppm