Know Your Environment. Protect Your Health.

Nitrate

Appleby 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.

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0330 ppm770.0205 ppm - 0.0445 ppm
20190.0350 ppm65ND - 0.0665 ppm
20200.0401 ppm660.0211 ppm - 0.0625 ppm
20210.0382 ppm770.0200 ppm - 0.0609 ppm
20220.0416 ppm880.0193 ppm - 0.0610 ppm
20230.0370 ppm87ND - 0.0802 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
2018-01-30Q18035390090.0445 ppm
2018-04-18Q18159980090.0286 ppm
2018-04-18Q18159980330.0336 ppm
2018-04-18Q18159980320.0205 ppm
2018-04-18Q18159980120.0328 ppm
2018-04-18Q18159980110.0356 ppm
2018-04-18Q18159980300.0356 ppm
2019-01-24Q19035940010.0665 ppm
2019-01-24Q1903594002ND
2019-01-24Q19035940150.0307 ppm
2019-01-24Q19035940160.0418 ppm
2019-01-24Q19035940170.0463 ppm
2019-04-24Q19165060010.0246 ppm
2020-05-06Q20178750290.0211 ppm
2020-05-06Q20178750480.0256 ppm
2020-05-06Q20178750330.0569 ppm
2020-05-06Q20178750320.0389 ppm
2020-05-06Q20178750310.0357 ppm
2020-05-06Q20178750300.0625 ppm
2021-02-01Q21028970310.0200 ppm
2021-02-01Q21028970300.0494 ppm
2021-02-01Q21028970280.0609 ppm
2021-02-01Q21028970250.0489 ppm
2021-02-01Q21028970220.0288 ppm
2021-02-01Q21028970290.0325 ppm
2021-07-26Q21194730100.0266 ppm
2022-02-01Q22036390100.0276 ppm
2022-02-01Q22036390110.0299 ppm
2022-02-01Q22036390150.0193 ppm
2022-05-16Q22144370100.0378 ppm
2022-09-06Q22263620150.0601 ppm
2022-09-06Q22263620160.0610 ppm
2022-09-06Q22263620140.0584 ppm
2022-09-06Q22263620040.0383 ppm
2023-03-07Q23088360080.0354 ppm
2023-03-22Q23108420010.0192 ppm
2023-03-22Q23108420030.0802 ppm
2023-03-22Q2310842020ND
2023-08-14Q23336970050.0318 ppm
2023-08-14Q23336970060.0398 ppm
2023-10-23Q23451740050.0598 ppm
2023-10-23Q23451740160.0299 ppm