EWG's Tap Water Database — 2019 UPDATE



North Las Vegas Utilities

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20120.613 ppm660.380 ppm - 1.30 ppm
20130.493 ppm770.350 ppm - 0.650 ppm
20140.608 ppm440.380 ppm - 1.000 ppm
20150.536 ppm550.390 ppm - 0.740 ppm
20160.383 ppm440.375 ppm - 0.390 ppm
20170.588 ppm330.355 ppm - 1.05 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

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
2012-05-2312050554-0010.380 ppm
2012-06-1112060201-0010.630 ppm
2012-06-1912060403-0020.390 ppm
2012-06-2712060581-0020.410 ppm
2012-09-1312090214-0011.30 ppm
2012-09-1812090312-0010.570 ppm
2013-05-2913050456-0010.380 ppm
2013-05-2913050452-0010.370 ppm
2013-06-1713060258-0010.650 ppm
2013-09-2513090371-0010.640 ppm
2013-10-1613100245-0020.350 ppm
2013-10-1613100245-0010.640 ppm
2013-12-1713120272-0010.420 ppm
2014-02-1114020152-0010.380 ppm
2014-06-2514060513-0010.400 ppm
2014-07-3114070540-0011.000 ppm
2014-09-0314090017-0010.650 ppm
2015-06-1515060254-0010.740 ppm
2015-06-1515060254-0020.390 ppm
2015-06-1715060304-0010.410 ppm
2015-06-1815060349-0010.410 ppm
2015-09-0915090134-0010.730 ppm
2016-03-1516030239-0010.390 ppm
2016-08-15S16041420010.375 ppm
2016-11-28S16050860010.386 ppm
2016-12-20S16066720010.380 ppm
2017-03-12S17011130010.359 ppm
2017-06-20S17018050010.355 ppm
2017-10-11S17065150011.05 ppm