Nitrate and nitrite

Maplehill Mobile Home Park

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.393 ppm	4	4	0.240 ppm - 0.570 ppm
2015	N/A	0	0	N/A
2016	0.376 ppm	5	5	0.0800 ppm - 1.06 ppm
2017	0.838 ppm	4	4	0.470 ppm - 1.12 ppm
2018	N/A	0	0	N/A
2019	0.582 ppm	5	5	0.200 ppm - 0.780 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The 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
2014-04-24	1402442-03_WL16	0.500 ppm
2014-04-24	1402442-02_WL16	0.240 ppm
2014-04-24	1402442-01_WL16	0.570 ppm
2014-04-24	1402442-04_WL16	0.260 ppm
2016-04-28	1602002-03_WL16	0.310 ppm
2016-04-28	1602002-06_WL16	0.110 ppm
2016-04-28	1602002-05_WL16	0.0800 ppm
2016-04-28	1602002-02_WL16	0.320 ppm
2016-04-28	1602002-04_WL16	1.06 ppm
2017-04-20	1701925-03_WL16	1.12 ppm
2017-04-20	1701925-02_WL16	0.470 ppm
2017-04-20	1701925-05_WL16	1.000 ppm
2017-04-20	1701925-04_WL16	0.760 ppm
2019-04-30	1901853-04_WL16	0.620 ppm
2019-04-30	1901853-03_WL16	0.780 ppm
2019-04-30	1901853-02_WL16	0.200 ppm
2019-04-30	1901853-01_WL16	0.680 ppm
2019-04-30	1901853-05_WL16	0.630 ppm