Know Your Environment. Protect Your Health.

Nitrate

Shorelands Road & Water Company

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.03 ppm550.640 ppm - 2.20 ppm
20190.988 ppm550.550 ppm - 2.10 ppm
20200.880 ppm54ND - 1.70 ppm
2021N/A00N/A
20221.26 ppm550.590 ppm - 1.80 ppm
20231.20 ppm550.740 ppm - 1.80 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
2018-12-04CA2300545_010_010-2018120408200.640 ppm
2018-12-04CA2300545_007_007-2018120409102.20 ppm
2018-12-04CA2300545_006_006-2018120409200.980 ppm
2018-12-04CA2300545_001_001-2018120408200.650 ppm
2018-12-04CA2300545_004_004-2018120408200.680 ppm
2019-11-18CA2300545_010_010-2019111808450.780 ppm
2019-11-18CA2300545_007_007-2019111808452.10 ppm
2019-11-18CA2300545_004_004-2019111808450.550 ppm
2019-11-18CA2300545_006_006-2019111808400.900 ppm
2019-11-18CA2300545_001_001-2019111808450.610 ppm
2020-11-10CA2300545_010_010-2020111008050.700 ppm
2020-11-10CA2300545_007_007-2020111008351.70 ppm
2020-11-10CA2300545_001_001-2020111008450.800 ppm
2020-11-10CA2300545_006_006-2020111008301.20 ppm
2020-11-10CA2300545_004_004-202011100835ND
2022-01-26CA2300545_001_001-2022012610001.10 ppm
2022-01-26CA2300545_006_006-2022012610401.10 ppm
2022-01-26CA2300545_004_004-2022012610550.590 ppm
2022-01-26CA2300545_010_010-2022012610051.80 ppm
2022-01-26CA2300545_007_007-2022012610001.70 ppm
2023-01-27CA2300545_001_001-2023012707550.960 ppm
2023-01-31CA2300545_004_004-2023013109101.10 ppm
2023-01-31CA2300545_007_007-2023013109101.80 ppm
2023-01-31CA2300545_006_006-2023013109420.740 ppm
2023-01-31CA2300545_010_010-2023013109101.40 ppm