Know Your Environment. Protect Your Health.

Nitrate

Sharon 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.

 

55

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0411 ppm880.0154 ppm - 0.0694 ppm
20190.0321 ppm10100.0164 ppm - 0.0482 ppm
20200.0376 ppm10100.0162 ppm - 0.0542 ppm
20210.0364 ppm10100.0153 ppm - 0.0630 ppm
20220.0322 ppm990.0193 ppm - 0.0414 ppm
20230.0310 ppm880.0198 ppm - 0.0426 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
2018-03-13Q18100620240.0362 ppm
2018-03-13Q18100620250.0447 ppm
2018-03-13Q18100620260.0361 ppm
2018-03-13Q18100620270.0694 ppm
2018-03-13Q18100620280.0154 ppm
2018-03-13Q18100620290.0240 ppm
2018-03-13Q18100620300.0550 ppm
2018-03-13Q18100620230.0482 ppm
2019-03-20Q19115470020.0353 ppm
2019-03-20Q19115470030.0245 ppm
2019-03-20Q19115470080.0164 ppm
2019-06-06Q19329690220.0255 ppm
2019-06-06Q19329690410.0438 ppm
2019-06-06Q19329690400.0399 ppm
2019-06-06Q19329690250.0205 ppm
2019-06-06Q19329690240.0482 ppm
2019-06-06Q19329690230.0366 ppm
2019-06-06Q19329690030.0300 ppm
2020-01-21Q20022540170.0333 ppm
2020-01-21Q20022540250.0346 ppm
2020-01-21Q20022540260.0360 ppm
2020-04-08Q20143380070.0274 ppm
2020-10-21Q20410360570.0377 ppm
2020-10-21Q20410360400.0162 ppm
2020-10-21Q20410360390.0492 ppm
2020-10-21Q20410360230.0542 ppm
2020-10-21Q20410360220.0368 ppm
2020-10-21Q20410360240.0508 ppm
2021-03-29Q21078620020.0630 ppm
2021-11-23Q21327640310.0423 ppm
2021-11-23Q21327640340.0259 ppm
2021-11-23Q21327640330.0153 ppm
2021-11-23Q21327640320.0397 ppm
2021-11-23Q21327640300.0497 ppm
2021-11-23Q21327640290.0271 ppm
2021-11-23Q21327640260.0364 ppm
2021-11-23Q21327640250.0366 ppm
2021-11-23Q21327640080.0282 ppm
2022-03-09Q22082290030.0400 ppm
2022-03-09Q22082290050.0300 ppm
2022-10-20Q22319300010.0359 ppm
2022-10-20Q22319300310.0306 ppm
2022-10-20Q22319300300.0242 ppm
2022-10-20Q22319300290.0193 ppm
2022-10-20Q22319300280.0370 ppm
2022-10-20Q22319300270.0414 ppm
2022-10-20Q22319300260.0314 ppm
2023-01-11Q23018060010.0308 ppm
2023-08-15Q23340310140.0198 ppm
2023-08-15Q23340310250.0381 ppm
2023-08-15Q23340310270.0344 ppm
2023-10-25Q23460210220.0312 ppm
2023-10-25Q23460210230.0426 ppm
2023-10-25Q23460210240.0200 ppm
2023-10-25Q23460210390.0314 ppm