Know Your Environment. Protect Your Health.

Nitrate and nitrite

Marybell Homes

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

24

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20184.56 ppm442.57 ppm - 6.06 ppm
20194.27 ppm552.88 ppm - 5.30 ppm
20204.67 ppm443.76 ppm - 5.79 ppm
20215.00 ppm442.84 ppm - 6.28 ppm
20224.67 ppm332.40 ppm - 7.48 ppm
20233.32 ppm441.45 ppm - 4.95 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

ppm = parts per million

All test results

Date Lab ID Result
2018-03-08NAT 1Q/18 MARYBELL6.06 ppm
2018-04-10NAT 2Q/18 MARYBELL4.83 ppm
2018-08-15NAT 3Q/18 MARYBELL4.79 ppm
2018-10-11NAT 4Q/18 MARYBELL2.57 ppm
2019-01-29NAT 1Q/19 MARYBELLE2.88 ppm
2019-03-18NAT 3M/19 MARYBELLE5.21 ppm
2019-05-13NAT 2Q/19 MARYBELLE3.98 ppm
2019-07-16NAT 3Q/19 MARYBELLE5.30 ppm
2019-10-18NAT 4Q/19 MARYBELLE3.96 ppm
2020-03-11NAT 1Q/20 MARYBELLE3.76 ppm
2020-05-13NAT 2Q/20 MARYBELLE5.79 ppm
2020-08-27NAT 3Q20 MARYBELLE4.76 ppm
2020-11-20NAT 4Q/20 MARYBELLE4.38 ppm
2021-03-24NAT 1Q/21 MARYBELLE2.84 ppm
2021-04-21NAT 2Q/21 MARYBELLE6.28 ppm
2021-07-12NAT 3Q/21 MARYBELLE5.79 ppm
2021-10-21NAT 4Q/21 MARYBELLE5.08 ppm
2022-02-22NAT 1Q 22 MARYBELLE2.40 ppm
2022-05-17NAT 2Q/22 MARYBELLE7.48 ppm
2022-10-05NAT 4Q 22 MARYBELLE4.14 ppm
2023-03-27NAT 1Q 23 MARYBELLE1.45 ppm
2023-06-19NAT 2Q/23 MARYBELLE4.95 ppm
2023-07-18NAT 3Q 23 MARYBELLE2.55 ppm
2023-10-30NAT 4Q 23 MARYBELLE4.33 ppm