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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Southeast Morris County Municipal Utilities Authority

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.

MORE ABOUT THIS CONTAMINANT

 

114

Samples

0

Samples exceeding legal limit (MCL)

92

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.17 ppm1412ND - 3.20 ppm
20151.05 ppm1312ND - 2.70 ppm
20161.19 ppm1412ND - 3.30 ppm
20171.35 ppm2523ND - 5.50 ppm
20181.38 ppm25250.0560 ppm - 4.70 ppm
20191.41 ppm2320ND - 4.10 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

Date Lab ID Result
2014-01-1529580400.300 ppm
2014-04-0930049971.10 ppm
2014-04-093004993ND
2014-04-0930049920.300 ppm
2014-04-0930049942.50 ppm
2014-04-0930049950.1000 ppm
2014-08-2030876210.200 ppm
2014-08-2030876222.30 ppm
2014-08-2030876231.20 ppm
2014-08-2030876241.000 ppm
2014-08-2030876251.80 ppm
2014-08-2030876262.40 ppm
2014-10-013115413ND
2014-10-0131154143.20 ppm
2015-02-0431811680.300 ppm
2015-04-2932328161.20 ppm
2015-04-293232812ND
2015-04-2932328110.300 ppm
2015-04-2932328132.70 ppm
2015-04-2932328140.200 ppm
2015-09-2933318110.200 ppm
2015-09-2933318091.30 ppm
2015-09-2933318101.000 ppm
2015-09-2933318121.90 ppm
2015-09-2933318132.40 ppm
2015-12-1633753480.1000 ppm
2015-12-1633753492.10 ppm
2016-01-2833918813.30 ppm
2016-02-1033985680.300 ppm
2016-05-1134465551.30 ppm
2016-05-113446551ND
2016-05-1134465500.200 ppm
2016-05-1134465522.40 ppm
2016-05-113446553ND
2016-08-0335120420.200 ppm
2016-08-0335120432.10 ppm
2016-08-0335120441.20 ppm
2016-08-0335120451.000 ppm
2016-08-0335120461.80 ppm
2016-08-0335120472.70 ppm
2016-11-0235779270.1000 ppm
2017-02-013630747ND
2017-04-1936777590.500 ppm
2017-04-1936777601.50 ppm
2017-04-193677756ND
2017-04-1936777550.300 ppm
2017-04-1936777573.40 ppm
2017-04-1936777580.1000 ppm
2017-07-1070236900010.130 ppm
2017-07-1770244240011.000 ppm
2017-07-2470251500011.10 ppm
2017-07-3170257530013.30 ppm
2017-08-0270260670010.260 ppm
2017-08-0270260670023.00 ppm
2017-08-0270260670031.90 ppm
2017-08-0270260670040.950 ppm
2017-08-0270260670051.70 ppm
2017-08-0870265970010.260 ppm
2017-08-1570273300011.70 ppm
2017-08-2270279600010.0520 ppm
2017-09-0570289600011.90 ppm
2017-09-1270297210012.30 ppm
2017-09-1970304520015.50 ppm
2017-09-2170308140011.10 ppm
2017-09-2670311410011.70 ppm
2017-11-0170346840010.0810 ppm
2018-02-077042411001-IOC0.220 ppm
2018-04-197049106005-IOC0.280 ppm
2018-04-197049106006-IOC1.30 ppm
2018-04-197049106001-IOC0.0640 ppm
2018-04-197049106002-IOC0.330 ppm
2018-04-197049106003-IOC3.70 ppm
2018-04-197049106004-IOC0.730 ppm
2018-07-127058101001-IOC1.10 ppm
2018-07-127058103001-IOC0.380 ppm
2018-07-177058601001-IOC2.40 ppm
2018-07-187058765001-IOC0.370 ppm
2018-07-187058765002-IOC3.70 ppm
2018-07-187058765003-IOC2.20 ppm
2018-07-187058765005-IOC1.10 ppm
2018-07-187058765004-IOC2.10 ppm
2018-07-317059981001-IOC0.1000 ppm
2018-08-017060126001-IOC0.0560 ppm
2018-08-077060758001-IOC3.50 ppm
2018-08-147061569001-IOC4.70 ppm
2018-08-157061785001-IOC1.30 ppm
2018-08-227062536001-IOC0.910 ppm
2018-08-287063082001-IOC1.80 ppm
2018-09-127064689001-IOC0.990 ppm
2018-09-197065405001-IOC1.10 ppm
2018-11-077070393001-IOC0.180 ppm
2019-02-067078742001-IOC0.590 ppm
2019-04-117085596005-IOC0.580 ppm
2019-04-117085596006-IOC1.000 ppm
2019-04-117085596001-IOCND
2019-04-117085596002-IOC0.570 ppm
2019-04-117085596003-IOC3.50 ppm
2019-04-117085596004-IOC0.120 ppm
2019-07-087096672001-IOC2.40 ppm
2019-07-157097562001-IOC0.970 ppm
2019-07-227098489001-IOC0.0780 ppm
2019-07-247098789001-IOC0.390 ppm
2019-07-247098789002-IOC4.10 ppm
2019-07-247098789003-IOC2.80 ppm
2019-07-247098789004-IOC0.910 ppm
2019-07-247098789005-IOC1.90 ppm
2019-07-297099282001-IOCND
2019-08-057099998001-IOC2.90 ppm
2019-08-1270100989001-IOC0.300 ppm
2019-08-1970101993001-IOC1.90 ppm
2019-08-2670102752001-IOC3.10 ppm
2019-09-1170104674001-IOC1.60 ppm
2019-09-1870105524001-IOC2.70 ppm
2019-11-1370111773001-IOCND