Know Your Environment. Protect Your Health.

Nitrate

Southwood Water System

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.

 

127

Samples

0

Samples exceeding legal limit (MCL)

62

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.970 ppm2312ND - 3.60 ppm
20191.11 ppm2313ND - 5.86 ppm
2020N/A00N/A
20210.963 ppm3121ND - 5.70 ppm
20221.04 ppm2711ND - 5.53 ppm
20231.09 ppm2311ND - 5.46 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
2018-01-22ND
2018-01-232.50 ppm
2018-01-230.400 ppm
2018-01-230.300 ppm
2018-01-231.90 ppm
2018-01-230.900 ppm
2018-01-233.60 ppm
2018-01-23ND
2018-01-23ND
2018-01-23ND
2018-01-230.400 ppm
2018-01-23ND
2018-01-23ND
2018-01-23ND
2018-01-231.10 ppm
2018-01-230.800 ppm
2018-01-23ND
2018-02-023.50 ppm
2018-02-023.30 ppm
2018-04-053.60 ppm
2018-05-04ND
2018-05-09ND
2018-07-19ND
2019-01-280.260 ppm
2019-01-283.14 ppm
2019-01-280.400 ppm
2019-01-280.790 ppm
2019-01-281.25 ppm
2019-02-080.260 ppm
2019-02-272.15 ppm
2019-02-270.800 ppm
2019-02-271.75 ppm
2019-02-27ND
2019-02-27ND
2019-02-27ND
2019-02-271.38 ppm
2019-02-27ND
2019-02-27ND
2019-02-283.67 ppm
2019-02-28ND
2019-03-01ND
2019-03-015.86 ppm
2019-05-213.87 ppm
2019-09-09ND
2019-10-04ND
2019-10-04ND
2021-01-294073480ND
2021-01-2940734710.0830 ppm
2021-01-2940734840.0500 ppm
2021-01-294073475ND
2021-01-294073476ND
2021-01-294073473ND
2021-01-294073477ND
2021-01-2940734740.340 ppm
2021-01-294073472ND
2021-03-1740969980.0710 ppm
2021-03-1740937741.20 ppm
2021-03-1844649880.620 ppm
2021-03-184465076ND
2021-03-184465041ND
2021-03-234098028ND
2021-03-2340969920.0270 ppm
2021-03-2340937324.60 ppm
2021-03-2340937330.740 ppm
2021-03-2540937694.20 ppm
2021-03-2540937710.380 ppm
2021-03-2540937722.70 ppm
2021-03-2540937681.90 ppm
2021-03-2540937313.85 ppm
2021-03-2540937705.70 ppm
2021-03-2540937300.650 ppm
2021-03-2540937730.0610 ppm
2021-04-0840977750.310 ppm
2021-04-0840977730.0250 ppm
2021-04-0840977740.300 ppm
2021-04-1444650812.06 ppm
2021-10-264201777ND
2022-01-264233561ND
2022-01-264233560ND
2022-01-264233562ND
2022-01-2742335632.77 ppm
2022-01-2742373203.71 ppm
2022-01-2842333605.53 ppm
2022-01-284233564ND
2022-02-0342589091.16 ppm
2022-02-034258908ND
2022-02-0342589100.500 ppm
2022-02-034258911ND
2022-02-044268894ND
2022-02-0442419582.30 ppm
2022-02-0842419684.94 ppm
2022-02-0842419673.60 ppm
2022-02-1042688961.01 ppm
2022-02-1042460560.835 ppm
2022-05-204465006ND
2022-05-204464946ND
2022-10-1144650791.63 ppm
2022-10-174366338ND
2022-11-034388503ND
2022-11-034388505ND
2022-11-284389473ND
2022-12-134384050ND
2022-12-154407269ND
2022-12-164388474ND
2023-01-054553453ND
2023-01-064553454ND
2023-01-0643976271.48 ppm
2023-01-064553455ND
2023-01-1244043801.01 ppm
2023-01-1244043780.540 ppm
2023-01-124404377ND
2023-01-234408644ND
2023-01-234408645ND
2023-01-2444086432.16 ppm
2023-01-2644077505.46 ppm
2023-02-084416080ND
2023-02-094416070ND
2023-02-094416072ND
2023-02-0944160741.64 ppm
2023-02-094416069ND
2023-02-0944160713.54 ppm
2023-02-0944160733.36 ppm
2023-02-1444237570.688 ppm
2023-09-264527280ND
2023-09-2645272813.07 ppm
2023-10-2645434842.16 ppm
2023-12-184557845ND