Know Your Environment. Protect Your Health.

Nitrate

City of Naples

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0645 ppm550.0445 ppm - 0.0964 ppm
20190.0745 ppm330.0554 ppm - 0.104 ppm
20200.0836 ppm550.0513 ppm - 0.146 ppm
20210.0840 ppm550.0563 ppm - 0.120 ppm
20220.0860 ppm440.0572 ppm - 0.139 ppm
20230.0693 ppm440.0373 ppm - 0.102 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
2018-03-15Q18106800190.0453 ppm
2018-03-15Q18106800380.0964 ppm
2018-03-15Q18106800390.0569 ppm
2018-03-15Q18106800400.0794 ppm
2018-03-15Q18106800180.0445 ppm
2019-08-15Q19559070010.0554 ppm
2019-08-15Q19559070110.0640 ppm
2019-08-15Q19559070120.104 ppm
2020-05-11Q20182180090.108 ppm
2020-05-11Q20182180100.0610 ppm
2020-05-11Q20182180110.146 ppm
2020-05-11Q20182180130.0513 ppm
2020-12-03Q20484840060.0517 ppm
2021-07-28Q21197490330.0720 ppm
2021-07-28Q21197490430.120 ppm
2021-07-28Q21197490420.0563 ppm
2021-07-28Q21197490410.104 ppm
2021-07-28Q21197490340.0678 ppm
2022-02-08Q22042730040.0572 ppm
2022-06-14Q22165050070.139 ppm
2022-06-14Q22165050080.0580 ppm
2022-11-15Q22342520020.0896 ppm
2023-06-15Q23227800010.0894 ppm
2023-06-15Q23227800020.102 ppm
2023-06-15Q23227800070.0486 ppm
2023-06-15Q23227800080.0373 ppm