Know Your Environment. Protect Your Health.

Nitrate

Meridian Water Department

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.

 

150

Samples

0

Samples exceeding legal limit (MCL)

82

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.06 ppm2514ND - 4.10 ppm
20191.08 ppm2514ND - 4.20 ppm
20201.20 ppm2413ND - 4.30 ppm
20211.41 ppm2716ND - 4.30 ppm
20221.23 ppm2415ND - 4.10 ppm
20231.08 ppm2513ND - 4.00 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

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
2018-01-30I1804233ND
2018-01-30I1804235ND
2018-03-26I2018003280233ND
2018-03-26I20180032802380.200 ppm
2018-03-26I20180032802353.60 ppm
2018-03-26I20180032802413.80 ppm
2018-03-26I2018003280240ND
2018-03-26I20180032802362.70 ppm
2018-03-26I2018003280242ND
2018-03-26I2018003280225ND
2018-03-26I2018003280229ND
2018-03-26I20180032802270.370 ppm
2018-03-26I20180032802262.20 ppm
2018-03-26I2018003280234ND
2018-03-26I20180032802393.80 ppm
2018-03-26I20180032802280.850 ppm
2018-03-26I20180032802434.10 ppm
2018-03-26I2018003280237ND
2018-03-26I2018003280232ND
2018-03-26I20180032802441.40 ppm
2018-03-26I20180032802301.10 ppm
2018-03-26I20180032802451.40 ppm
2018-03-26I2018003280246ND
2018-04-10I2018041203110.120 ppm
2018-06-12I2018061311440.820 ppm
2019-04-08201904090198ND
2019-04-092019041004302.70 ppm
2019-04-092019041001023.20 ppm
2019-05-082019050903833.60 ppm
2019-05-092019071601811.20 ppm
2019-05-132019051401410.140 ppm
2019-05-13201905140151ND
2019-05-14201905150505ND
2019-05-15201905160477ND
2019-05-152019051605650.200 ppm
2019-05-15I201905160477ND
2019-05-212019052201003.80 ppm
2019-05-212019052201364.10 ppm
2019-05-232019052401214.20 ppm
2019-05-282019070807651.70 ppm
2019-05-28I201905290110.600 ppm
2019-05-29201907080763ND
2019-05-292019053003241.000 ppm
2019-06-03201907080761ND
2019-06-03201907080762ND
2019-06-05201907160182ND
2019-06-06201907160184ND
2019-06-112019071602500.360 ppm
2019-12-16201912170165ND
2019-12-162019121701660.270 ppm
2020-03-10202003110242ND
2020-03-102020031102534.30 ppm
2020-03-172020031803412.90 ppm
2020-03-172020031804453.00 ppm
2020-03-172020031804871.30 ppm
2020-03-18202003190169ND
2020-04-07202004080530ND
2020-04-072020040805580.910 ppm
2020-07-29202007300124ND
2020-08-05202008060243ND
2020-08-06202008070395ND
2020-08-06202008070424ND
2020-08-06202008070429ND
2020-08-132020081401950.250 ppm
2020-08-192020082001613.70 ppm
2020-11-042020110507250.980 ppm
2020-11-042020110507261.20 ppm
2020-11-042020110507271.80 ppm
2020-11-042020110507283.80 ppm
2020-11-232020112403440.410 ppm
2020-11-23202011240342ND
2020-11-242020112502754.30 ppm
2020-11-24202011250284ND
2020-12-02202012030482ND
2021-01-19202101200340ND
2021-01-19202101200341ND
2021-01-19202101200339ND
2021-01-192021012003424.30 ppm
2021-01-202021012102773.60 ppm
2021-01-202021012102943.50 ppm
2021-01-202021012102801.80 ppm
2021-01-20202101210279ND
2021-01-202021012102783.00 ppm
2021-01-25202101260299ND
2021-01-25202101260274ND
2021-01-252021012602730.210 ppm
2021-01-25202101260272ND
2021-01-252021012603011.70 ppm
2021-01-25202101260302ND
2021-01-252021012603000.380 ppm
2021-01-25202101260271ND
2021-01-262021012705793.90 ppm
2021-01-262021012705783.00 ppm
2021-01-262021012704121.000 ppm
2021-01-26202101270413ND
2021-01-262021012704101.20 ppm
2021-01-26202101270411ND
2021-01-262021012705773.30 ppm
2021-07-152021071609840.230 ppm
2021-07-212021072202763.50 ppm
2021-11-162021111706843.50 ppm
2022-02-152022021700461.30 ppm
2022-02-15202202170047ND
2022-02-15202202160929ND
2022-02-15202202160930ND
2022-02-22202202231260ND
2022-02-222022022312610.230 ppm
2022-02-222022022312630.0510 ppm
2022-02-22202202231264ND
2022-02-22202202231265ND
2022-03-012022030209923.30 ppm
2022-03-012022030209934.10 ppm
2022-03-012022030209940.910 ppm
2022-03-012022030302621.90 ppm
2022-03-01202203030263ND
2022-03-022022030308963.00 ppm
2022-03-022022030308973.00 ppm
2022-03-02202203030898ND
2022-03-302022033102392.00 ppm
2022-04-122022041307843.10 ppm
2022-05-182022052002841.70 ppm
2022-11-16380-28629-10.590 ppm
2022-12-19380-31949-10.420 ppm
2022-12-19380-31896-14.00 ppm
2022-12-27380-32595-1ND
2023-08-01380-57235-1ND
2023-08-02380-57434-10.940 ppm
2023-08-02380-57496-1ND
2023-08-02380-57460-1ND
2023-08-02380-57439-10.190 ppm
2023-08-02380-57437-10.680 ppm
2023-08-02380-57464-11.20 ppm
2023-08-02380-57431-1AAND
2023-08-07380-57977-12.90 ppm
2023-08-07380-57957-1ND
2023-08-07380-57974-1ND
2023-08-07380-57897-1ND
2023-08-07380-57894-14.00 ppm
2023-08-07380-57899-12.10 ppm
2023-08-09380-58461-13.60 ppm
2023-08-09380-58355-1ND
2023-08-09380-58481-1ND
2023-08-09380-58496-13.50 ppm
2023-08-10380-58742-1ND
2023-08-10380-58749-1ND
2023-08-10380-58702-1ND
2023-09-26380-64488-12.70 ppm
2023-09-26380-64427-12.70 ppm
2023-11-14380-71156-12.00 ppm
2023-11-14380-71138-10.450 ppm