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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Eastern Municipal Water District

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.

 

904

Samples

0

Samples exceeding legal limit (MCL)

509

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.807 ppm14264ND - 2.71 ppm
20151.30 ppm16483ND - 4.97 ppm
20161.47 ppm14686ND - 5.60 ppm
20171.49 ppm155119ND - 4.70 ppm
20180.988 ppm14892ND - 5.10 ppm
20190.855 ppm14965ND - 4.60 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
2014-01-011379-071-07011.72 ppm
2014-01-021379-063-0701ND
2014-01-021379-081-0801ND
2014-01-061379-063-0701ND
2014-01-061379-071-08011.81 ppm
2014-01-061379-081-0801ND
2014-01-131379-063-0701ND
2014-01-131379-071-07011.87 ppm
2014-01-131379-081-0001ND
2014-01-201379-063-0701ND
2014-01-201379-071-08012.71 ppm
2014-01-201379-081-0801ND
2014-01-271379-063-0701ND
2014-01-271379-071-07012.15 ppm
2014-01-271379-081-0801ND
2014-02-031379-063-07020.474 ppm
2014-02-031379-071-08022.26 ppm
2014-02-031379-081-0702ND
2014-02-101379-063-07020.633 ppm
2014-02-101379-071-09022.12 ppm
2014-02-101379-081-0702ND
2014-02-181379-063-0702ND
2014-02-181379-071-09021.83 ppm
2014-02-181379-081-0702ND
2014-02-241379-063-07020.587 ppm
2014-02-241379-071-08021.72 ppm
2014-03-031379-063-08030.587 ppm
2014-03-031379-071-09031.92 ppm
2014-03-031379-081-0803ND
2014-03-101379-063-00030.723 ppm
2014-03-101379-071-00032.06 ppm
2014-03-101379-081-0003ND
2014-03-171379-063-08030.497 ppm
2014-03-171379-071-08032.24 ppm
2014-03-171379-081-07030.497 ppm
2014-03-241379-063-07030.542 ppm
2014-03-241379-071-08032.26 ppm
2014-03-241379-081-0703ND
2014-04-011379-063-09040.745 ppm
2014-04-011379-071-07042.71 ppm
2014-04-011379-081-0804ND
2014-04-071379-063-08040.474 ppm
2014-04-071379-071-09042.71 ppm
2014-04-071379-081-0704ND
2014-04-141379-063-07040.474 ppm
2014-04-141379-071-09042.48 ppm
2014-04-141379-081-0804ND
2014-04-211379-063-0704ND
2014-04-211379-071-08041.51 ppm
2014-04-211379-081-0704ND
2014-04-281379-063-07040.497 ppm
2014-04-281379-071-08041.45 ppm
2014-04-281379-081-0704ND
2014-05-051379-063-07050.497 ppm
2014-05-051379-071-09051.65 ppm
2014-05-051379-081-0805ND
2014-05-121379-063-0705ND
2014-05-121379-071-08051.38 ppm
2014-05-121379-081-0005ND
2014-05-191379-063-0005ND
2014-05-191379-071-09052.10 ppm
2014-05-191379-081-0005ND
2014-05-261379-063-00050.474 ppm
2014-05-261379-071-08052.71 ppm
2014-05-261379-081-0805ND
2014-06-021379-063-0806ND
2014-06-021379-071-08062.01 ppm
2014-06-021379-081-0806ND
2014-06-091379-063-07060.474 ppm
2014-06-091379-071-08062.24 ppm
2014-06-091379-081-0706ND
2014-06-161379-063-07060.452 ppm
2014-06-161379-071-09062.48 ppm
2014-06-161379-081-0806ND
2014-06-231379-063-0706ND
2014-06-231379-071-0806ND
2014-06-231379-081-0706ND
2014-07-011379-063-0807ND
2014-07-011379-071-08071.99 ppm
2014-07-011379-081-0807ND
2014-07-071379-063-0707ND
2014-07-071379-071-09072.26 ppm
2014-07-071379-081-0707ND
2014-07-141379-063-0807ND
2014-07-141379-071-07072.71 ppm
2014-07-211379-063-0707ND
2014-07-211379-071-08072.03 ppm
2014-07-211379-081-0707ND
2014-07-281379-063-0707ND
2014-07-281379-071-08072.24 ppm
2014-07-281379-081-0807ND
2014-08-041379-063-0708ND
2014-08-041379-071-08082.48 ppm
2014-08-041379-081-0808ND
2014-08-111379-063-0808ND
2014-08-111379-071-08082.21 ppm
2014-08-111379-081-0708ND
2014-08-181379-063-0808ND
2014-08-181379-071-09082.71 ppm
2014-08-181379-081-0808ND
2014-08-251379-063-0808ND
2014-08-251379-071-08082.48 ppm
2014-09-021379-063-0709ND
2014-09-021379-071-08092.48 ppm
2014-09-021379-081-0809ND
2014-09-081379-063-0709ND
2014-09-081379-071-08092.21 ppm
2014-09-081379-081-0809ND
2014-09-151379-063-0709ND
2014-09-151379-071-08092.26 ppm
2014-09-221379-063-0709ND
2014-09-221379-071-09092.26 ppm
2014-09-221379-081-0709ND
2014-10-011379-063-0810ND
2014-10-011379-071-09102.48 ppm
2014-10-011379-081-0910ND
2014-10-061379-063-0710ND
2014-10-061379-071-08102.48 ppm
2014-10-061379-081-0810ND
2014-10-131379-063-0710ND
2014-10-131379-071-09102.71 ppm
2014-10-131379-081-0710ND
2014-10-201379-063-0710ND
2014-10-201379-071-08102.26 ppm
2014-10-201379-081-0810ND
2014-10-271379-063-0710ND
2014-10-271379-071-09101.90 ppm
2014-12-011379-063-0712ND
2014-12-011379-071-07122.17 ppm
2014-12-011379-081-0912ND
2014-12-081379-063-0712ND
2014-12-081379-071-08122.26 ppm
2014-12-091379-081-0812ND
2014-12-151379-063-0712ND
2014-12-151379-071-09122.24 ppm
2014-12-151379-081-0812ND
2014-12-221379-063-0812ND
2014-12-221379-071-09122.26 ppm
2014-12-221379-081-0812ND
2014-12-291379-063-0712ND
2014-12-291379-071-09122.71 ppm
2014-12-291379-081-0812ND
2015-01-051379-063-0701ND
2015-01-051379-071-09012.48 ppm
2015-01-051379-081-1001ND
2015-01-121379-063-0701ND
2015-01-121379-071-09012.48 ppm
2015-01-121379-081-0801ND
2015-01-191379-063-0701ND
2015-01-191379-071-09012.48 ppm
2015-01-191379-081-0801ND
2015-01-261379-063-0701ND
2015-01-261379-071-08011.65 ppm
2015-01-261379-081-0701ND
2015-02-021379-063-0702ND
2015-02-021379-071-09022.71 ppm
2015-02-021379-081-0802ND
2015-02-091379-063-0702ND
2015-02-091379-071-08021.97 ppm
2015-02-091379-081-0802ND
2015-02-171379-063-0802ND
2015-02-171379-071-08022.94 ppm
2015-02-171379-081-0702ND
2015-02-231379-063-07020.520 ppm
2015-02-231379-071-09022.94 ppm
2015-02-251379-081-07020.633 ppm
2015-03-021379-063-07030.700 ppm
2015-03-021379-071-09033.16 ppm
2015-03-021379-081-09030.723 ppm
2015-03-091379-071-09033.39 ppm
2015-03-091379-081-08030.768 ppm
2015-03-101379-063-0703ND
2015-03-161379-063-07030.474 ppm
2015-03-161379-071-09033.61 ppm
2015-03-161379-081-0703ND
2015-03-231379-063-07030.520 ppm
2015-03-231379-071-09032.94 ppm
2015-03-231379-081-0803ND
2015-04-011379-063-08040.474 ppm
2015-04-011379-071-08042.94 ppm
2015-04-011379-081-0904ND
2015-04-061379-063-08040.497 ppm
2015-04-061379-071-08043.16 ppm
2015-04-061379-081-0804ND
2015-04-131379-063-07040.452 ppm
2015-04-131379-071-09043.16 ppm
2015-04-131379-081-0904ND
2015-04-201379-063-08040.497 ppm
2015-04-201379-071-08043.39 ppm
2015-04-201379-081-0704ND
2015-04-221379-056-13043.84 ppm
2015-04-271379-063-07040.497 ppm
2015-04-271379-071-08043.61 ppm
2015-04-271379-081-0704ND
2015-05-041379-063-0705ND
2015-05-041379-071-09053.39 ppm
2015-05-041379-081-0805ND
2015-05-061379-071-12053.16 ppm
2015-05-111379-063-07050.520 ppm
2015-05-111379-071-09053.39 ppm
2015-05-111379-081-0705ND
2015-05-181379-063-07050.565 ppm
2015-05-181379-071-09053.61 ppm
2015-05-181379-081-0705ND
2015-05-261379-063-07050.497 ppm
2015-05-261379-071-09053.61 ppm
2015-05-261379-081-0705ND
2015-06-011379-063-0706ND
2015-06-011379-071-08063.61 ppm
2015-06-011379-081-0806ND
2015-06-081379-063-0706ND
2015-06-081379-071-09063.16 ppm
2015-06-081379-081-0706ND
2015-06-151379-063-0806ND
2015-06-151379-071-09063.39 ppm
2015-06-151379-081-0706ND
2015-06-221379-063-0806ND
2015-06-221379-071-09063.39 ppm
2015-06-221379-081-0706ND
2015-07-011379-063-0907ND
2015-07-011379-071-07073.16 ppm
2015-07-011379-081-0707ND
2015-07-061379-063-0707ND
2015-07-061379-071-08073.39 ppm
2015-07-061379-081-0807ND
2015-07-131379-063-0807ND
2015-07-131379-071-08073.39 ppm
2015-07-131379-081-0707ND
2015-07-201379-063-0707ND
2015-07-201379-071-07073.61 ppm
2015-07-201379-081-0807ND
2015-07-271379-063-0807ND
2015-07-271379-071-09073.61 ppm
2015-07-271379-081-0807ND
2015-08-041379-063-1008ND
2015-08-041379-063-10150.400 ppm
2015-08-041379-071-08083.61 ppm
2015-08-041379-071-08303.60 ppm
2015-08-041379-081-0808ND
2015-08-041379-081-0820ND
2015-08-051379-056-12084.97 ppm
2015-08-051379-056-12144.90 ppm
2015-08-101379-063-0708ND
2015-08-101379-071-09083.61 ppm
2015-08-101379-081-0708ND
2015-08-171379-063-0808ND
2015-08-171379-071-08083.39 ppm
2015-08-171379-081-0808ND
2015-08-241379-063-0708ND
2015-08-241379-071-09083.39 ppm
2015-08-241379-081-0708ND
2015-09-011379-063-0809ND
2015-09-011379-071-08093.40 ppm
2015-09-011379-081-0709ND
2015-09-081379-063-0809ND
2015-09-081379-071-08092.60 ppm
2015-09-081379-081-0809ND
2015-09-141379-063-0709ND
2015-09-141379-081-0809ND
2015-09-161379-071-11093.60 ppm
2015-09-211379-063-07090.410 ppm
2015-09-211379-071-08094.00 ppm
2015-09-211379-081-0809ND
2015-09-281379-063-07090.500 ppm
2015-09-281379-071-09094.00 ppm
2015-09-281379-081-0909ND
2015-10-051379-063-0710ND
2015-10-051379-071-08103.60 ppm
2015-10-051379-081-0810ND
2015-10-121379-063-0710ND
2015-10-121379-071-09104.10 ppm
2015-10-121379-081-0910ND
2015-10-191379-063-0710ND
2015-10-191379-071-09104.00 ppm
2015-10-191379-081-0810ND
2015-10-261379-063-0710ND
2015-10-261379-071-09103.60 ppm
2015-10-261379-081-0710ND
2015-11-021379-063-0711ND
2015-11-021379-071-08113.80 ppm
2015-11-021379-081-0811ND
2015-11-091379-063-07110.470 ppm
2015-11-091379-071-08113.80 ppm
2015-11-091379-081-0811ND
2015-11-161379-063-07110.630 ppm
2015-11-161379-071-09113.90 ppm
2015-11-161379-081-0711ND
2015-11-171379-056-08114.60 ppm
2015-11-231379-063-0711ND
2015-11-231379-071-09113.60 ppm
2015-11-231379-081-0711ND
2015-12-011379-063-07120.480 ppm
2015-12-011379-071-09123.90 ppm
2015-12-011379-081-0812ND
2015-12-071379-063-07120.420 ppm
2015-12-071379-071-12123.80 ppm
2015-12-071379-081-0712ND
2015-12-141379-063-07120.620 ppm
2015-12-141379-071-07123.90 ppm
2015-12-141379-081-0812ND
2015-12-211379-063-07120.740 ppm
2015-12-211379-071-09124.20 ppm
2015-12-211379-081-0812ND
2015-12-281379-063-08120.540 ppm
2015-12-281379-071-11123.80 ppm
2015-12-281379-081-0812ND
2016-01-041379-063-09010.860 ppm
2016-01-041379-071-08013.90 ppm
2016-01-041379-081-0801ND
2016-01-111379-063-07010.870 ppm
2016-01-111379-071-08014.20 ppm
2016-01-121379-081-1201ND
2016-01-181379-063-07010.880 ppm
2016-01-181379-071-08013.70 ppm
2016-01-181379-081-0701ND
2016-01-251379-063-07010.530 ppm
2016-01-251379-071-08013.30 ppm
2016-01-251379-081-0001ND
2016-02-011379-063-08020.750 ppm
2016-02-011379-071-08024.00 ppm
2016-02-011379-081-0802ND
2016-02-081379-063-0802ND
2016-02-081379-071-09023.90 ppm
2016-02-091379-056-12025.60 ppm
2016-02-111379-081-0802ND
2016-02-161379-063-08020.440 ppm
2016-02-161379-071-09024.20 ppm
2016-02-161379-081-0702ND
2016-02-221379-081-0802ND
2016-02-241379-063-0702ND
2016-02-241379-071-08023.80 ppm
2016-03-021379-063-07030.800 ppm
2016-03-021379-071-08033.80 ppm
2016-03-021379-081-0803ND
2016-03-071379-071-09033.40 ppm
2016-03-071379-081-0703ND
2016-03-091379-063-07030.980 ppm
2016-03-141379-071-08033.70 ppm
2016-03-141379-081-0703ND
2016-03-161379-063-07030.560 ppm
2016-03-211379-071-09033.60 ppm
2016-03-211379-081-0703ND
2016-03-231379-063-07030.470 ppm
2016-03-281379-071-09033.90 ppm
2016-03-281379-081-0803ND
2016-03-301379-063-06030.820 ppm
2016-05-021379-063-10050.560 ppm
2016-05-021379-071-07054.00 ppm
2016-05-021379-081-0705ND
2016-05-091379-063-07050.530 ppm
2016-05-091379-071-08053.30 ppm
2016-05-091379-081-0805ND
2016-05-161379-063-0705ND
2016-05-161379-071-08053.70 ppm
2016-05-161379-081-0705ND
2016-05-231379-063-0705ND
2016-05-231379-071-08053.40 ppm
2016-05-231379-081-0705ND
2016-06-011379-063-0706ND
2016-06-011379-071-08064.30 ppm
2016-06-011379-081-0806ND
2016-06-061379-063-0606ND
2016-06-061379-071-08063.60 ppm
2016-06-061379-081-0806ND
2016-06-131379-063-0706ND
2016-06-131379-071-08064.00 ppm
2016-06-131379-081-0706ND
2016-06-161379-056-09064.00 ppm
2016-06-201379-063-07060.900 ppm
2016-06-201379-071-08062.90 ppm
2016-06-201379-081-0806ND
2016-06-271379-063-07060.520 ppm
2016-06-271379-071-08062.40 ppm
2016-06-271379-081-08060.450 ppm
2016-07-051379-063-1007ND
2016-07-051379-071-09072.50 ppm
2016-07-051379-081-0807ND
2016-07-111379-063-0707ND
2016-07-111379-071-08072.20 ppm
2016-07-111379-081-0807ND
2016-07-181379-063-07070.400 ppm
2016-07-181379-071-08073.10 ppm
2016-07-181379-081-0707ND
2016-07-251379-063-0707ND
2016-07-251379-071-09073.10 ppm
2016-07-251379-081-0707ND
2016-08-011379-071-08084.60 ppm
2016-08-011379-081-0808ND
2016-08-021379-063-0808ND
2016-08-081379-063-0708ND
2016-08-081379-071-09083.60 ppm
2016-08-081379-081-0908ND
2016-08-151379-063-07080.530 ppm
2016-08-151379-071-08083.80 ppm
2016-08-151379-081-0708ND
2016-08-221379-063-10080.470 ppm
2016-08-221379-071-09083.80 ppm
2016-08-221379-081-0708ND
2016-09-011379-063-08090.470 ppm
2016-09-011379-071-11093.20 ppm
2016-09-011379-081-0909ND
2016-09-061379-063-07090.470 ppm
2016-09-061379-071-09093.20 ppm
2016-09-061379-081-0709ND
2016-09-121379-063-0709ND
2016-09-121379-071-08093.90 ppm
2016-09-121379-081-0809ND
2016-09-131379-056-13093.40 ppm
2016-09-191379-063-06090.750 ppm
2016-09-191379-071-09093.90 ppm
2016-09-191379-081-0909ND
2016-09-261379-063-07090.820 ppm
2016-09-261379-071-09093.10 ppm
2016-09-261379-081-0709ND
2016-10-031379-063-07100.770 ppm
2016-10-031379-071-08103.30 ppm
2016-10-031379-081-0710ND
2016-10-101379-056-10103.60 ppm
2016-10-101379-071-09104.40 ppm
2016-10-101379-081-0810ND
2016-10-111379-063-06100.670 ppm
2016-10-171379-063-06100.720 ppm
2016-10-171379-071-08104.30 ppm
2016-10-171379-081-0810ND
2016-10-241379-063-06100.780 ppm
2016-10-241379-071-09104.40 ppm
2016-10-241379-081-0710ND
2016-11-011379-063-09110.780 ppm
2016-11-011379-071-08114.30 ppm
2016-11-071379-063-06110.540 ppm
2016-11-071379-071-09114.00 ppm
2016-11-091379-081-0811ND
2016-11-141379-063-0711ND
2016-11-141379-071-08114.40 ppm
2016-11-141379-081-0811ND
2016-11-211379-063-07110.500 ppm
2016-11-211379-071-08114.40 ppm
2016-11-211379-081-0911ND
2016-12-011379-063-07120.680 ppm
2016-12-011379-071-08124.20 ppm
2016-12-011379-081-0812ND
2016-12-051379-063-07120.920 ppm
2016-12-051379-071-08124.30 ppm
2016-12-051379-081-0712ND
2016-12-121379-063-07120.570 ppm
2016-12-121379-071-08124.00 ppm
2016-12-121379-081-0712ND
2016-12-191379-063-07120.550 ppm
2016-12-191379-071-09124.40 ppm
2016-12-191379-081-0812ND
2016-12-271379-063-07120.470 ppm
2016-12-281379-081-0912ND
2017-01-031379-081-0801ND
2017-01-041379-063-07010.710 ppm
2017-01-091379-063-07010.570 ppm
2017-01-091379-081-0701ND
2017-01-101379-056-10014.70 ppm
2017-01-101379-071-08013.70 ppm
2017-01-171379-063-07010.520 ppm
2017-01-171379-071-07014.30 ppm
2017-01-171379-081-0801ND
2017-01-231379-063-07010.550 ppm
2017-01-231379-071-09014.20 ppm
2017-01-231379-081-0801ND
2017-02-011379-063-08020.910 ppm
2017-02-011379-071-10024.00 ppm
2017-02-011379-081-06020.510 ppm
2017-02-061379-063-07021.20 ppm
2017-02-061379-071-08023.80 ppm
2017-02-061379-081-07020.550 ppm
2017-02-131379-071-08024.20 ppm
2017-02-131379-081-07020.870 ppm
2017-02-141379-063-08021.20 ppm
2017-02-211379-063-07021.10 ppm
2017-02-211379-071-07023.90 ppm
2017-02-211379-081-07020.780 ppm
2017-03-011379-063-07031.30 ppm
2017-03-011379-071-08033.20 ppm
2017-03-011379-081-06030.820 ppm
2017-03-061379-063-08031.20 ppm
2017-03-061379-071-09033.20 ppm
2017-03-061379-081-08030.790 ppm
2017-03-131379-063-07031.000 ppm
2017-03-131379-071-09033.20 ppm
2017-03-131379-081-07030.740 ppm
2017-03-201379-063-07030.680 ppm
2017-03-201379-071-09033.30 ppm
2017-03-201379-081-07030.700 ppm
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2017-12-181379-081-08120.660 ppm
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2018-01-291379-063-07010.800 ppm
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2018-02-261379-063-07020.730 ppm
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2018-03-051379-063-09200.680 ppm
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2018-03-121379-063-12000.600 ppm
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2018-03-261379-063-12000.700 ppm
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2018-04-161379-063-08000.500 ppm
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2018-04-231379-063-08120.500 ppm
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2018-05-211379-063-07070.600 ppm
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2018-06-111379-071-06352.30 ppm
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2018-06-181379-071-06351.90 ppm
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2018-10-221379-071-07352.10 ppm
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2018-12-031379-063-08500.600 ppm
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2018-12-101379-063-08150.600 ppm
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2018-12-171379-063-08150.600 ppm
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2018-12-171379-081-0730ND
2018-12-191379-056-14235.10 ppm
2018-12-261379-063-07300.600 ppm
2018-12-261379-071-09002.20 ppm
2018-12-261379-081-0700ND
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2019-04-011379-063-07300.600 ppm
2019-04-011379-071-06252.10 ppm
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2019-12-244790-071-07452.10 ppm
2019-12-304790-071-06052.10 ppm