Know Your Environment. Protect Your Health.

Nitrate

Laurel Pump 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.

 

77

Samples

0

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.729 ppm13130.286 ppm - 1.92 ppm
20190.416 ppm1311ND - 0.905 ppm
20200.656 ppm1210ND - 1.60 ppm
20210.939 ppm1311ND - 2.65 ppm
20221.18 ppm1312ND - 3.48 ppm
20230.852 ppm13130.530 ppm - 1.72 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
2018-01-24S7574630.300 ppm
2018-02-14S7577710.400 ppm
2018-03-13S7577910.700 ppm
2018-04-05S7593440.864 ppm
2018-04-06S7707420.882 ppm
2018-05-24S7593520.286 ppm
2018-06-05S7594741.92 ppm
2018-07-12S7578010.644 ppm
2018-08-30S7595441.82 ppm
2018-09-19S7595700.530 ppm
2018-10-16S7595910.386 ppm
2018-11-14S7578130.413 ppm
2018-12-13S7596720.340 ppm
2019-01-10S7596760.644 ppm
2019-02-21S7596430.905 ppm
2019-03-12S7596330.489 ppm
2019-03-22S8170530.665 ppm
2019-04-02S7596360.533 ppm
2019-05-23S7592820.332 ppm
2019-06-20S759290ND
2019-07-24S7597280.648 ppm
2019-08-21S7597030.386 ppm
2019-09-03S7597040.262 ppm
2019-10-18S8958650.285 ppm
2019-11-12S759358ND
2019-12-09S9199870.260 ppm
2020-01-09S7593660.270 ppm
2020-02-12S922978ND
2020-03-13S9229860.481 ppm
2020-03-25S9019060.394 ppm
2020-05-20S9230231.10 ppm
2020-06-23S9230451.27 ppm
2020-07-14S9230311.60 ppm
2020-08-13S9230380.646 ppm
2020-09-23S9920270.455 ppm
2020-10-08S9920510.393 ppm
2020-11-18S10207661.25 ppm
2020-12-10S992059ND
2021-01-14S9920670.952 ppm
2021-02-08S10351562.16 ppm
2021-02-12S10351651.42 ppm
2021-03-04S9920752.65 ppm
2021-04-12S9231050.656 ppm
2021-05-06S9230760.614 ppm
2021-06-04S9230850.529 ppm
2021-07-02S923155ND
2021-08-05S9231220.404 ppm
2021-09-03S9231801.56 ppm
2021-10-08S9232030.931 ppm
2021-11-19S10735060.333 ppm
2021-12-03S1073512ND
2022-01-06S9231913.03 ppm
2022-01-14S11367870.357 ppm
2022-02-16S1073792ND
2022-03-03S10738080.981 ppm
2022-04-14S10735190.761 ppm
2022-05-13S10735713.48 ppm
2022-06-03S10735720.546 ppm
2022-07-01S10735500.411 ppm
2022-08-22S9231700.770 ppm
2022-09-12S12230170.621 ppm
2022-10-05S12230232.79 ppm
2022-11-07S10735420.519 ppm
2022-12-06S10735581.05 ppm
2023-01-05S12230440.553 ppm
2023-02-15S12230580.667 ppm
2023-02-24S12571060.545 ppm
2023-03-13S12230920.536 ppm
2023-04-10S12230621.72 ppm
2023-05-26S12230800.530 ppm
2023-06-15S12230870.663 ppm
2023-07-07S12231000.901 ppm
2023-08-04S10738910.646 ppm
2023-09-18S12231481.13 ppm
2023-10-23S12231520.786 ppm
2023-11-03S10738970.720 ppm
2023-12-08S10738541.68 ppm