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EWG's Tap Water Database

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Nitrate

Warminster Municipal Authority

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.

 

179

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20102.58 ppm3433ND - 3.99 ppm
20112.04 ppm17170.850 ppm - 2.82 ppm
20122.48 ppm34340.610 ppm - 3.45 ppm
20132.30 ppm35350.850 ppm - 3.48 ppm
20142.41 ppm3433ND - 4.38 ppm
20152.45 ppm2523ND - 3.50 ppm

ppm = parts per million.

State and national drinking water standards and health guidelines

Health Guideline 0.14 ppm

The health guideline of 0.14 ppm for nitrate was defined in a peer-reviewed scientific study by EWG and corresponds to one-in-one-million annual cancer risk level.

ppm = parts per million.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppm = parts per million.

EPA Maximum Contaminant
Level Goal (MCLG)10 ppm

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppm = parts per million.

All test results

Date Lab ID Result
2010-01-12105610A3.60 ppm
2010-01-12105610B2.89 ppm
2010-01-12105610C2.88 ppm
2010-01-12105610D2.64 ppm
2010-01-12105610E2.44 ppm
2010-01-12105610G3.54 ppm
2010-01-12105610H2.37 ppm
2010-01-12105610I2.03 ppm
2010-01-12105610J2.53 ppm
2010-01-12105610K3.47 ppm
2010-01-12105610L3.99 ppm
2010-01-12105610M0.990 ppm
2010-01-12105610N3.62 ppm
2010-01-12105610F2.42 ppm
2010-01-12105610O2.71 ppm
2010-01-12105610P2.75 ppm
2010-03-041319101.56 ppm
2010-07-07717210A3.38 ppm
2010-07-07717210B2.95 ppm
2010-07-07717210C3.37 ppm
2010-07-07717210D3.20 ppm
2010-07-07717210E2.15 ppm
2010-07-07717210G3.47 ppm
2010-07-07717210H2.19 ppm
2010-07-07717210I1.27 ppm
2010-07-07717210J1.98 ppm
2010-07-07717210K2.72 ppm
2010-07-07717210L3.15 ppm
2010-07-07717210M0.880 ppm
2010-07-07717210NND
2010-07-07717210O3.58 ppm
2010-07-07717210F2.34 ppm
2010-07-07717210P2.37 ppm
2010-07-07717210Q2.35 ppm
2011-07-065170-11A2.53 ppm
2011-07-065170-11B2.44 ppm
2011-07-065170-11C2.62 ppm
2011-07-065170-11D2.62 ppm
2011-07-065170-11E2.15 ppm
2011-07-065170-11G2.82 ppm
2011-07-065170-11H1.72 ppm
2011-07-065170-11I1.51 ppm
2011-07-065170-11J1.85 ppm
2011-07-065170-11K2.22 ppm
2011-07-065170-11L2.44 ppm
2011-07-065170-11M0.940 ppm
2011-07-065170-11N0.850 ppm
2011-07-065170-11O2.38 ppm
2011-07-065170-11F1.92 ppm
2011-07-065170-11P1.75 ppm
2011-07-065170-11Q1.98 ppm
2012-01-103.36 ppm
2012-01-103.29 ppm
2012-01-102.57 ppm
2012-01-103.39 ppm
2012-01-102.11 ppm
2012-01-101.61 ppm
2012-01-102.02 ppm
2012-01-102.90 ppm
2012-01-102.96 ppm
2012-01-101.21 ppm
2012-01-100.610 ppm
2012-01-103.22 ppm
2012-01-102.10 ppm
2012-01-102.26 ppm
2012-01-102.34 ppm
2012-02-093.12 ppm
2012-02-093.34 ppm
2012-07-103.09 ppm
2012-07-103.45 ppm
2012-07-102.01 ppm
2012-07-101.45 ppm
2012-07-103.11 ppm
2012-07-100.970 ppm
2012-07-103.33 ppm
2012-07-102.31 ppm
2012-07-113.33 ppm
2012-07-112.85 ppm
2012-07-112.88 ppm
2012-07-112.38 ppm
2012-07-112.06 ppm
2012-07-112.83 ppm
2012-07-111.26 ppm
2012-07-112.10 ppm
2012-07-112.61 ppm
2013-01-083.15 ppm
2013-01-083.13 ppm
2013-01-083.27 ppm
2013-01-083.14 ppm
2013-01-082.46 ppm
2013-01-083.48 ppm
2013-01-082.04 ppm
2013-01-082.13 ppm
2013-01-082.34 ppm
2013-01-082.82 ppm
2013-01-082.80 ppm
2013-01-081.21 ppm
2013-01-080.850 ppm
2013-01-082.61 ppm
2013-01-082.40 ppm
2013-01-082.24 ppm
2013-01-082.00 ppm
2013-07-083.10 ppm
2013-07-082.71 ppm
2013-07-082.71 ppm
2013-07-082.62 ppm
2013-07-082.29 ppm
2013-07-081.77 ppm
2013-07-082.58 ppm
2013-07-081.73 ppm
2013-07-081.80 ppm
2013-07-082.38 ppm
2013-07-082.56 ppm
2013-07-081.23 ppm
2013-07-081.14 ppm
2013-07-082.60 ppm
2013-07-081.70 ppm
2013-07-081.85 ppm
2013-07-082.04 ppm
2013-07-091.75 ppm
2014-01-074.02 ppm
2014-01-073.84 ppm
2014-01-073.66 ppm
2014-01-073.32 ppm
2014-01-072.80 ppm
2014-01-073.73 ppm
2014-01-072.05 ppm
2014-01-072.04 ppm
2014-01-072.35 ppm
2014-01-073.18 ppm
2014-01-073.03 ppm
2014-01-071.30 ppm
2014-01-070.660 ppm
2014-01-072.93 ppm
2014-01-071.99 ppm
2014-01-072.00 ppm
2014-01-070.820 ppm
2014-01-172.09 ppm
2014-07-094.38 ppm
2014-07-092.64 ppm
2014-07-092.82 ppm
2014-07-092.49 ppm
2014-07-092.09 ppm
2014-07-092.92 ppm
2014-07-092.10 ppm
2014-07-091.66 ppm
2014-07-092.55 ppm
2014-07-092.46 ppm
2014-07-09ND
2014-07-091.29 ppm
2014-07-092.71 ppm
2014-07-092.16 ppm
2014-07-091.75 ppm
2014-07-092.01 ppm
2015-01-05122738642.77 ppm
2015-01-08122738383.22 ppm
2015-01-08122738393.04 ppm
2015-01-08122738403.28 ppm
2015-01-08122738412.53 ppm
2015-01-08122738433.18 ppm
2015-01-08122738442.42 ppm
2015-01-08122738452.76 ppm
2015-01-08122738462.73 ppm
2015-01-08122738473.50 ppm
2015-01-08122738422.39 ppm
2015-01-08122738481.94 ppm
2015-01-08122738492.16 ppm
2015-07-09130008253.03 ppm
2015-07-0913000826ND
2015-07-09130008273.30 ppm
2015-07-09130008282.68 ppm
2015-07-09130008292.23 ppm
2015-07-09130008303.18 ppm
2015-07-09130008311.93 ppm
2015-07-09130008322.77 ppm
2015-07-09130008332.74 ppm
2015-07-0913000834ND
2015-07-09130008351.62 ppm
2015-07-09130008361.87 ppm