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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

New York City 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.

 

286

Samples

0

Samples exceeding legal limit (MCL)

144

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.161 ppm36360.0950 ppm - 0.225 ppm
20130.145 ppm33330.102 ppm - 0.169 ppm
20140.169 ppm40400.104 ppm - 0.255 ppm
20150.218 ppm53530.0980 ppm - 0.545 ppm
20160.153 ppm60600.0457 ppm - 0.446 ppm
20170.112 ppm64640.0570 ppm - 0.325 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
2012-01-031400.174 ppm
2012-01-031480.168 ppm
2012-01-031350.172 ppm
2012-02-0730060.190 ppm
2012-02-0729980.185 ppm
2012-02-0729930.193 ppm
2012-03-0652860.191 ppm
2012-03-0652780.183 ppm
2012-03-0652730.181 ppm
2012-04-0375260.187 ppm
2012-04-0375270.189 ppm
2012-04-0375250.188 ppm
2012-05-0198470.176 ppm
2012-05-0198480.169 ppm
2012-05-0198490.175 ppm
2012-06-05126720.146 ppm
2012-06-05126730.155 ppm
2012-06-05126710.175 ppm
2012-07-12158730.120 ppm
2012-07-12158750.120 ppm
2012-07-12158740.1000 ppm
2012-08-07183760.225 ppm
2012-08-07183780.208 ppm
2012-08-07183770.181 ppm
2012-09-11214610.162 ppm
2012-09-11214600.136 ppm
2012-09-11214590.185 ppm
2012-10-02232900.0950 ppm
2012-10-02232880.101 ppm
2012-10-02232890.0970 ppm
2012-11-07264060.141 ppm
2012-11-07264040.141 ppm
2012-11-07264050.142 ppm
2012-12-04285550.149 ppm
2012-12-04285530.152 ppm
2012-12-04105540.148 ppm
2013-02-0529530.158 ppm
2013-02-0529510.159 ppm
2013-02-0529520.157 ppm
2013-03-0552120.163 ppm
2013-03-0552110.166 ppm
2013-03-0552100.166 ppm
2013-04-0275560.168 ppm
2013-04-0275550.167 ppm
2013-04-0275540.169 ppm
2013-05-07105250.142 ppm
2013-05-07105240.154 ppm
2013-05-07105260.146 ppm
2013-06-04129260.127 ppm
2013-06-04129270.132 ppm
2013-06-04129250.135 ppm
2013-07-09162270.150 ppm
2013-07-09162260.143 ppm
2013-07-09162250.152 ppm
2013-08-06189290.162 ppm
2013-08-06189270.161 ppm
2013-08-06189280.158 ppm
2013-09-04214480.140 ppm
2013-09-04214500.139 ppm
2013-09-04214490.141 ppm
2013-10-08245010.102 ppm
2013-10-08245020.111 ppm
2013-10-08245000.150 ppm
2013-11-06270910.123 ppm
2013-11-06270920.122 ppm
2013-11-06270940.122 ppm
2013-12-03292550.138 ppm
2013-12-03292560.138 ppm
2013-12-03292540.140 ppm
2014-01-074390.194 ppm
2014-01-074370.160 ppm
2014-01-074380.158 ppm
2014-02-0427110.183 ppm
2014-02-0427120.183 ppm
2014-02-0427100.180 ppm
2014-02-0427130.181 ppm
2014-03-0550740.255 ppm
2014-03-0550750.246 ppm
2014-03-0550730.243 ppm
2014-04-0173030.233 ppm
2014-04-0173050.214 ppm
2014-04-0173040.227 ppm
2014-05-06102180.210 ppm
2014-05-06102210.207 ppm
2014-05-06102200.247 ppm
2014-05-06102190.206 ppm
2014-06-03125530.175 ppm
2014-06-03125540.174 ppm
2014-06-03125550.173 ppm
2014-07-08159030.144 ppm
2014-07-08159050.145 ppm
2014-07-08159040.152 ppm
2014-08-05183790.151 ppm
2014-08-05183820.144 ppm
2014-08-05183800.151 ppm
2014-08-05183810.141 ppm
2014-09-09213410.159 ppm
2014-09-09213400.160 ppm
2014-09-09213390.171 ppm
2014-10-07237810.127 ppm
2014-10-07237800.117 ppm
2014-10-07237790.128 ppm
2014-11-05262170.115 ppm
2014-11-05262160.104 ppm
2014-11-05262150.130 ppm
2014-11-05262140.123 ppm
2014-12-02282690.112 ppm
2014-12-02282680.112 ppm
2014-12-02282700.112 ppm
2015-01-063410.175 ppm
2015-01-063400.177 ppm
2015-01-063390.180 ppm
2015-02-0427360.180 ppm
2015-02-0427390.180 ppm
2015-02-0427370.180 ppm
2015-02-0427380.180 ppm
2015-03-0348720.219 ppm
2015-03-0348740.220 ppm
2015-03-0348730.220 ppm
2015-04-0777570.265 ppm
2015-04-0777550.267 ppm
2015-04-0777560.263 ppm
2015-05-0198620.213 ppm
2015-05-0198630.211 ppm
2015-05-0198640.212 ppm
2015-05-0198610.215 ppm
2015-05-05102150.517 ppm
2015-06-02127260.197 ppm
2015-06-02127270.448 ppm
2015-06-02127250.198 ppm
2015-06-02127240.197 ppm
2015-06-02127280.199 ppm
2015-07-07161850.230 ppm
2015-07-07161830.231 ppm
2015-07-07161820.228 ppm
2015-07-07161840.420 ppm
2015-07-07161810.232 ppm
2015-08-04188610.207 ppm
2015-08-04188600.440 ppm
2015-08-04188580.208 ppm
2015-08-04188590.204 ppm
2015-08-04188570.204 ppm
2015-09-02216990.111 ppm
2015-09-02217030.113 ppm
2015-09-02217020.461 ppm
2015-09-02217010.111 ppm
2015-09-02217000.105 ppm
2015-10-07250880.540 ppm
2015-10-07250850.121 ppm
2015-10-07250840.137 ppm
2015-10-07250870.545 ppm
2015-10-07250860.133 ppm
2015-11-04277840.184 ppm
2015-11-04277120.116 ppm
2015-11-04277870.115 ppm
2015-11-04277880.1000 ppm
2015-11-04277830.0980 ppm
2015-12-01302500.122 ppm
2015-12-01302520.116 ppm
2015-12-01302530.175 ppm
2015-12-01302510.110 ppm
2015-12-01302540.111 ppm
2016-01-06333370.122 ppm
2016-01-06333390.289 ppm
2016-01-06333380.274 ppm
2016-01-06333360.119 ppm
2016-01-06333350.123 ppm
2016-02-02359410.124 ppm
2016-02-02359380.125 ppm
2016-02-02359370.124 ppm
2016-02-02359390.125 ppm
2016-02-02359400.275 ppm
2016-03-01386270.129 ppm
2016-03-01386260.310 ppm
2016-03-01386250.129 ppm
2016-03-01386230.128 ppm
2016-03-01386240.128 ppm
2016-04-05421910.406 ppm
2016-04-05421880.103 ppm
2016-04-05421890.104 ppm
2016-04-05421870.105 ppm
2016-04-05421900.404 ppm
2016-05-03451130.101 ppm
2016-05-03451140.0990 ppm
2016-05-03451160.446 ppm
2016-05-03451150.1000 ppm
2016-05-03451170.445 ppm
2016-06-07484960.101 ppm
2016-06-07484920.101 ppm
2016-06-07484930.0960 ppm
2016-06-07484950.320 ppm
2016-06-07484940.1000 ppm
2016-07-12524090.436 ppm
2016-07-12524080.112 ppm
2016-07-12524060.110 ppm
2016-07-12524100.113 ppm
2016-07-12524070.113 ppm
2016-08-09556620.0768 ppm
2016-08-09556640.0784 ppm
2016-08-09556660.0748 ppm
2016-08-09556630.0763 ppm
2016-08-09556650.354 ppm
2016-09-07587620.146 ppm
2016-09-07587640.147 ppm
2016-09-07587630.149 ppm
2016-09-07587610.148 ppm
2016-09-07587600.145 ppm
2016-10-05617460.0510 ppm
2016-10-05617470.0457 ppm
2016-10-05617480.0505 ppm
2016-10-05617490.0503 ppm
2016-10-05617500.0512 ppm
2016-11-01644560.249 ppm
2016-11-01644540.0739 ppm
2016-11-01644530.0757 ppm
2016-11-01644570.0727 ppm
2016-11-01644550.0766 ppm
2016-12-06678130.0944 ppm
2016-12-06678710.0945 ppm
2016-12-06678650.139 ppm
2016-12-06678720.0945 ppm
2016-12-06678660.139 ppm
2017-01-043900.193 ppm
2017-01-043890.104 ppm
2017-01-043880.103 ppm
2017-01-043860.110 ppm
2017-01-043910.193 ppm
2017-02-0737070.325 ppm
2017-02-0737080.319 ppm
2017-02-0737050.115 ppm
2017-02-0737060.116 ppm
2017-02-0737040.133 ppm
2017-02-0737030.130 ppm
2017-03-0763090.116 ppm
2017-03-0763080.115 ppm
2017-03-0763100.115 ppm
2017-03-0763070.116 ppm
2017-03-0763050.114 ppm
2017-04-0489800.137 ppm
2017-04-0489810.134 ppm
2017-04-0489760.142 ppm
2017-04-0489780.136 ppm
2017-04-0489790.147 ppm
2017-05-02117310.110 ppm
2017-05-02117340.109 ppm
2017-05-02117320.104 ppm
2017-05-02117350.109 ppm
2017-05-02117330.109 ppm
2017-05-02117300.109 ppm
2017-06-06151210.0940 ppm
2017-06-06151260.0940 ppm
2017-06-06151250.0960 ppm
2017-06-06151240.0970 ppm
2017-06-06151230.0920 ppm
2017-07-05180900.0950 ppm
2017-07-05180920.0940 ppm
2017-07-05180870.0950 ppm
2017-07-05180910.0930 ppm
2017-07-05180890.0950 ppm
2017-08-01212910.143 ppm
2017-08-01213360.153 ppm
2017-08-01213420.128 ppm
2017-08-01213430.142 ppm
2017-08-01213410.138 ppm
2017-08-01213350.150 ppm
2017-09-06250740.1000 ppm
2017-09-06250720.109 ppm
2017-09-06250690.109 ppm
2017-09-06250730.110 ppm
2017-09-06250710.103 ppm
2017-10-04280900.0570 ppm
2017-10-04280880.0670 ppm
2017-10-04280910.0660 ppm
2017-10-04280920.0670 ppm
2017-10-04280930.0670 ppm
2017-11-08318250.0670 ppm
2017-11-08318230.0680 ppm
2017-11-08318220.0670 ppm
2017-11-08318260.0650 ppm
2017-11-08318240.0660 ppm
2017-11-08318270.0650 ppm
2017-12-05345420.0730 ppm
2017-12-05345440.0730 ppm
2017-12-05345390.0740 ppm
2017-12-05345410.0740 ppm
2017-12-05345430.0710 ppm