Know Your Environment. Protect Your Health.

Nitrate and nitrite

Willow Park Marina

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND20ND
2021ND40ND
2022ND20ND
2023N/A00N/A

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
2018-06-20CA0707507_001_001-201806201245ND
2018-06-20CA0707507_002_002-201806201300ND
2020-03-18CA0707507_001_001-202003180837ND
2020-03-18CA0707507_002_002-202003180741ND
2021-03-17CA0707507_002_002-202103170815ND
2021-03-17CA0707507_001_001-202103170812ND
2021-06-23CA0707507_002_002-202106230820ND
2021-06-23CA0707507_001_001-202106230800ND
2022-03-16CA0707507_001_001-202203160842ND
2022-03-16CA0707507_002_002-202203160845ND