Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Nitrate

City of Mesa

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.

 

187

Samples

0

Samples exceeding legal limit (MCL)

183

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.87 ppm31310.230 ppm - 6.60 ppm
20131.97 ppm30300.260 ppm - 7.40 ppm
20141.99 ppm2928ND - 7.43 ppm
20152.47 ppm3433ND - 7.56 ppm
20162.22 ppm3130ND - 7.34 ppm
20172.24 ppm3231ND - 6.66 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
2012-03-06PVC0904-011.60 ppm
2012-04-16201204160112I6.60 ppm
2012-05-07201205070059I2.50 ppm
2012-05-07201205070067I0.870 ppm
2012-05-08201205080126I2.90 ppm
2012-08-06201208060115I3.00 ppm
2012-08-06201208060116I2.20 ppm
2012-08-06201208060117I0.800 ppm
2012-08-07201208070367I1.40 ppm
2012-08-08201208080563I2.60 ppm
2012-08-08201208080564I1.40 ppm
2012-08-08201208080565I1.20 ppm
2012-08-13201208130183I3.50 ppm
2012-08-13201208130184I0.520 ppm
2012-08-13201208130185I3.90 ppm
2012-08-14201208140227I0.420 ppm
2012-08-14201208140228I3.70 ppm
2012-08-14201208140229I2.20 ppm
2012-08-15201208150501I1.20 ppm
2012-08-15201208150502I3.80 ppm
2012-08-15201208150503I0.300 ppm
2012-08-22120707781.26 ppm
2012-08-22120707832.69 ppm
2012-08-22120707861.04 ppm
2012-08-27120707720.330 ppm
2012-08-27120707771.48 ppm
2012-08-27120707790.870 ppm
2012-08-28120707810.850 ppm
2012-08-28120707851.57 ppm
2012-09-27201209270445I0.960 ppm
2012-11-202012112001155I0.230 ppm
2013-02-13201302140564I0.390 ppm
2013-03-05201303050107I1.20 ppm
2013-03-05201303050108I1.30 ppm
2013-04-09201304100495I3.00 ppm
2013-04-09201304100496I2.50 ppm
2013-04-09201304100497I1.40 ppm
2013-04-10201304110556I2.60 ppm
2013-04-10201304110557I1.50 ppm
2013-04-10201304110558I0.840 ppm
2013-04-10201304110559I2.90 ppm
2013-04-29201304290124I2.60 ppm
2013-04-29201304290125I7.40 ppm
2013-05-09201305100033I0.900 ppm
2013-05-09201305100034I1.60 ppm
2013-05-09201305100035I1.60 ppm
2013-05-15201305150439I2.50 ppm
2013-05-20201305200201I1.30 ppm
2013-05-20201305200202I1.30 ppm
2013-07-16130702762.77 ppm
2013-07-16130702771.75 ppm
2013-07-16130702781.76 ppm
2013-07-16130702790.900 ppm
2013-07-17130702803.72 ppm
2013-07-24130706880.330 ppm
2013-08-06130800490.470 ppm
2013-08-06130800500.530 ppm
2013-08-06130800512.04 ppm
2013-08-07130800533.92 ppm
2013-08-14130800523.87 ppm
2013-10-14131004950.260 ppm
2014-02-1214020403I1.51 ppm
2014-03-20140305360.270 ppm
2014-04-09140404391.60 ppm
2014-04-14140404611.60 ppm
2014-04-14140404633.28 ppm
2014-04-15140405120.890 ppm
2014-04-15140405131.22 ppm
2014-04-15140405144.26 ppm
2014-04-15140405151.15 ppm
2014-04-15140405162.16 ppm
2014-04-16140404640.530 ppm
2014-04-16140404654.93 ppm
2014-04-16140404661.55 ppm
2014-04-16140404672.75 ppm
2014-04-21140405627.43 ppm
2014-04-21140405632.42 ppm
2014-04-21140405640.800 ppm
2014-04-21140405651.37 ppm
2014-04-22140405463.30 ppm
2014-04-22140405470.300 ppm
2014-04-22140405481.21 ppm
2014-04-22140405491.53 ppm
2014-07-18140703201.57 ppm
2014-07-18140703211.11 ppm
2014-08-0414080001I0.430 ppm
2014-08-04140800031.89 ppm
2014-08-05140800083.22 ppm
2014-10-0814100297ND
2014-10-08141002983.32 ppm
2015-04-07150402490.325 ppm
2015-04-07150402721.05 ppm
2015-04-07150402731.36 ppm
2015-04-14150404000.420 ppm
2015-04-21150406061.54 ppm
2015-04-28150407681.98 ppm
2015-04-29150407717.56 ppm
2015-04-29150407722.36 ppm
2015-07-06150700733.82 ppm
2015-07-06150700742.04 ppm
2015-07-06150700760.840 ppm
2015-07-06150700772.94 ppm
2015-07-07150701170.896 ppm
2015-07-07150701181.17 ppm
2015-07-0715070119I1.33 ppm
2015-07-0715070120IOC1.38 ppm
2015-07-1315070247I2.53 ppm
2015-07-13150702490.534 ppm
2015-07-13150702503.57 ppm
2015-07-13150702511.26 ppm
2015-07-1415070252I1.67 ppm
2015-07-14150702533.89 ppm
2015-07-14150702544.00 ppm
2015-07-14150702552.67 ppm
2015-07-20150703910.314 ppm
2015-07-20150703927.32 ppm
2015-07-21150704472.05 ppm
2015-07-21150704483.00 ppm
2015-07-21150704494.47 ppm
2015-07-21150704503.58 ppm
2015-07-21150704514.41 ppm
2015-07-2715070541ND
2015-10-19151004857.56 ppm
2015-11-17151102840.240 ppm
2016-04-19160406897.34 ppm
2016-05-11160504382.86 ppm
2016-06-0816060165I1.55 ppm
2016-07-05160700143.60 ppm
2016-07-05160700152.72 ppm
2016-07-05160700241.64 ppm
2016-07-07160701274.06 ppm
2016-07-07160701281.40 ppm
2016-07-07160701291.20 ppm
2016-07-11160701371.06 ppm
2016-07-11160701380.853 ppm
2016-07-11160701393.69 ppm
2016-07-12160701400.470 ppm
2016-07-12160701410.994 ppm
2016-07-13160701430.606 ppm
2016-07-1316070144ND
2016-07-14160701451.68 ppm
2016-07-14160701464.10 ppm
2016-07-18160705072.42 ppm
2016-07-18160705084.94 ppm
2016-07-18160705092.04 ppm
2016-07-19160705250.310 ppm
2016-07-21160705630.900 ppm
2016-07-21160705641.03 ppm
2016-07-21160705651.33 ppm
2016-07-21160705661.38 ppm
2016-07-28160705624.16 ppm
2016-07-28160708033.66 ppm
2016-07-28160708044.71 ppm
2016-10-04161000390.216 ppm
2016-10-18161005721.81 ppm
2017-04-11170403872.08 ppm
2017-04-19170405766.66 ppm
2017-05-25170506710.925 ppm
2017-05-25170506723.21 ppm
2017-07-10170701690.414 ppm
2017-07-10170702314.19 ppm
2017-07-10170702321.57 ppm
2017-07-11170702931.35 ppm
2017-07-12170702941.14 ppm
2017-07-12170702951.50 ppm
2017-07-13170702962.35 ppm
2017-07-13170702970.910 ppm
2017-07-18070704783.63 ppm
2017-07-18170704795.11 ppm
2017-07-19170704804.44 ppm
2017-07-19170704811.26 ppm
2017-07-24170706401.65 ppm
2017-07-24170706412.70 ppm
2017-07-24170706420.846 ppm
2017-08-09170803721.78 ppm
2017-08-16170706450.550 ppm
2017-08-16170706461.08 ppm
2017-08-16170706474.19 ppm
2017-08-16170706480.993 ppm
2017-08-16170706491.01 ppm
2017-08-2117080520IOC1.76 ppm
2017-08-21170805210.310 ppm
2017-08-23170706433.89 ppm
2017-10-1017100401ND
2017-10-1217100475 IOC2.21 ppm
2017-10-25171007333.60 ppm
2017-11-28171107014.24 ppm