Menu

EWG's Tap Water Database — 2021 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.

MORE ABOUT THIS CONTAMINANT

 

199

Samples

0

Samples exceeding legal limit (MCL)

193

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.99 ppm2928ND - 7.43 ppm
20152.47 ppm3433ND - 7.56 ppm
20162.22 ppm3130ND - 7.34 ppm
20172.24 ppm3231ND - 6.66 ppm
20182.72 ppm3534ND - 6.94 ppm
20192.66 ppm3837ND - 6.57 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
2014-02-1214020403I1.51 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
2018-02-08180203765.08 ppm
2018-04-02180309422.12 ppm
2018-04-0418030948 IOC4.33 ppm
2018-04-09180400984.56 ppm
2018-04-0918040100 IOC6.94 ppm
2018-04-10180401010.413 ppm
2018-04-1618040220 IOC3.27 ppm
2018-04-1618040222 IOC0.542 ppm
2018-04-1718040223 IOC0.899 ppm
2018-04-17180402244.00 ppm
2018-04-2418040502 IOC1.85 ppm
2018-04-2418040503 IOC1.88 ppm
2018-04-2418040504 IOC0.321 ppm
2018-04-3018040540 IOC4.26 ppm
2018-05-10180504254.06 ppm
2018-08-0718080202 IOC0.223 ppm
2018-08-08180804274.50 ppm
2018-08-09180804996.44 ppm
2018-10-11181004521.41 ppm
2018-10-15181004843.72 ppm
2018-10-15181005063.20 ppm
2018-10-16181005174.42 ppm
2018-10-16181005191.55 ppm
2018-10-1718100555 IOC1.51 ppm
2018-10-17181005571.64 ppm
2018-10-1818100597ND
2018-10-18181006014.32 ppm
2018-10-22181006381.62 ppm
2018-10-22181006402.01 ppm
2018-10-23181006731.58 ppm
2018-10-24181006813.09 ppm
2018-10-24181006830.837 ppm
2018-10-29181007506.40 ppm
2018-10-29181007521.32 ppm
2018-11-2618110662 IOC0.908 ppm
2019-01-08190103235.68 ppm
2019-01-09190103646.57 ppm
2019-03-27190306531.47 ppm
2019-03-27190306551.02 ppm
2019-03-27190306561.44 ppm
2019-03-28190305800.274 ppm
2019-04-08190401801.22 ppm
2019-04-08190401824.83 ppm
2019-04-09190402104.78 ppm
2019-04-09190402126.46 ppm
2019-04-10190402600.364 ppm
2019-04-11190402871.66 ppm
2019-04-15190403310.325 ppm
2019-04-15190403332.88 ppm
2019-04-16190403520.547 ppm
2019-04-16190403540.873 ppm
2019-04-22190404533.94 ppm
2019-04-22190404592.16 ppm
2019-04-24190405222.00 ppm
2019-04-25190405471.61 ppm
2019-08-01190708732.14 ppm
2019-08-01190708754.67 ppm
2019-08-05190800192.76 ppm
2019-08-08190801271.22 ppm
2019-08-08190801290.722 ppm
2019-08-12190801781.40 ppm
2019-08-13190802020.860 ppm
2019-08-14190802343.00 ppm
2019-08-15190802783.40 ppm
2019-08-15190802801.50 ppm
2019-08-19190803035.20 ppm
2019-08-21190805771.50 ppm
2019-08-26190806571.59 ppm
2019-09-19190905986.10 ppm
2019-09-19190906004.25 ppm
2019-10-2319100589ND
2019-11-07191101675.88 ppm
2019-11-07191101684.92 ppm