Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Nitrate and nitrite

Jefferson County W and S District - M

NOTE: Jefferson County W and S District - M purchases water from Toronto Public Water System which is required to test for nitrate and nitrite. Sample information shown below was taken by Toronto Public Water System.

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

73

Samples

0

Samples exceeding legal limit (MCL)

72

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.983 ppm13130.590 ppm - 1.36 ppm
20131.15 ppm12120.680 ppm - 1.50 ppm
20140.890 ppm12120.670 ppm - 1.25 ppm
20150.921 ppm12120.700 ppm - 1.48 ppm
20160.859 ppm1211ND - 1.20 ppm
20170.861 ppm12120.620 ppm - 1.10 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The 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

ppm = parts per million

All test results

NOTE: Jefferson County W and S District - M purchases water from Toronto Public Water System which is required to test for nitrate and nitrite. Sample information shown below was taken by Toronto Public Water System.

Date Lab ID Result
2012-01-1093000994420.850 ppm
2012-01-2493000884890.860 ppm
2012-02-1493000283640.900 ppm
2012-03-1393000031940.960 ppm
2012-04-1093001163510.830 ppm
2012-05-0893000861720.590 ppm
2012-06-1293000861731.15 ppm
2012-07-1093001192281.12 ppm
2012-08-1493000285051.08 ppm
2012-09-1193001192291.36 ppm
2012-10-0993000448031.16 ppm
2012-11-1393000631551.02 ppm
2012-12-1193000237140.900 ppm
2013-01-0893000175451.30 ppm
2013-02-1293000952221.20 ppm
2013-03-1293000853831.08 ppm
2013-04-0993000853850.900 ppm
2013-05-14A1301043080.680 ppm
2013-06-1193001043111.04 ppm
2013-07-0993001289861.20 ppm
2013-08-13A1301195051.15 ppm
2013-09-10A1301121041.20 ppm
2013-10-08A1300851891.20 ppm
2013-11-12A1300485801.35 ppm
2013-12-10A1301079841.50 ppm
2014-01-14A1401702241.25 ppm
2014-02-11A1401123080.920 ppm
2014-03-12A1401870260.910 ppm
2014-04-08A1401870270.840 ppm
2014-05-13A1402016280.670 ppm
2014-06-10A1401043731.05 ppm
2014-07-08A1401614100.800 ppm
2014-08-12A1402132280.680 ppm
2014-09-09A1402019330.900 ppm
2014-10-14A1402405111.12 ppm
2014-11-11A1402133020.740 ppm
2014-12-09A1401938760.800 ppm
2015-01-13A1502580090.750 ppm
2015-02-10A1502652211.05 ppm
2015-03-10A1502360961.10 ppm
2015-04-14A1502427270.840 ppm
2015-05-12A1502919660.800 ppm
2015-06-09A1502591760.860 ppm
2015-07-14A1502591770.700 ppm
2015-08-11A1501244890.790 ppm
2015-09-08A1502580851.04 ppm
2015-10-13A1502068341.48 ppm
2015-11-10A1503345700.740 ppm
2015-12-08A1503501880.900 ppm
2016-01-12A1603501861.06 ppm
2016-02-09A1602943980.980 ppm
2016-03-08A1603501890.870 ppm
2016-04-12A1603501900.630 ppm
2016-05-10A160381165ND
2016-06-07A1603812480.980 ppm
2016-07-05A1603741190.840 ppm
2016-08-02A1603769020.860 ppm
2016-09-06A1603741200.960 ppm
2016-10-04A1604307961.20 ppm
2016-11-01A1604440811.03 ppm
2016-12-13A1604528260.900 ppm
2017-01-10A1703430490.880 ppm
2017-02-07A1704628381.10 ppm
2017-03-07A1704605770.880 ppm
2017-04-04A1704488350.780 ppm
2017-05-02A1704908580.620 ppm
2017-06-06A1704908750.810 ppm
2017-07-11A1705114680.780 ppm
2017-08-08A1705213210.950 ppm
2017-09-05A1703610220.900 ppm
2017-10-03A1702778450.950 ppm
2017-11-07A1705337710.740 ppm
2017-12-05A1705478200.940 ppm