Nitrate and nitrite
Ridgewood Water
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | 4.04 ppm | 15 | 15 | 2.80 ppm - 5.60 ppm |
2016 | 4.17 ppm | 57 | 57 | 2.20 ppm - 6.40 ppm |
2017 | 3.97 ppm | 64 | 64 | 2.00 ppm - 8.10 ppm |
2018 | 3.91 ppm | 68 | 68 | 1.30 ppm - 6.70 ppm |
2019 | 4.32 ppm | 57 | 57 | 1.55 ppm - 6.85 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 |
---|---|---|
2015-10-14 | 5100424-04 | 5.50 ppm |
2015-10-14 | 5100424-03 | 4.60 ppm |
2015-10-14 | 5100424-10 | 2.80 ppm |
2015-10-14 | 5100424-05 | 4.80 ppm |
2015-10-14 | 5100424-01 | 4.70 ppm |
2015-10-14 | 5100424-09 | 3.30 ppm |
2015-10-14 | 5100424-02 | 5.60 ppm |
2015-10-14 | 5100424-07 | 2.80 ppm |
2015-10-14 | 5100424-06 | 3.30 ppm |
2015-10-14 | 5100424-08 | 3.00 ppm |
2015-10-21 | 5100667-03 | 3.40 ppm |
2015-10-21 | 5100667-02 | 3.50 ppm |
2015-10-21 | 5100667-04 | 4.20 ppm |
2015-10-21 | 5100667-01 | 4.10 ppm |
2015-12-29 | 5120773-02 | 5.00 ppm |
2016-01-07 | 6010110-06 | 5.90 ppm |
2016-01-07 | 6010110-01 | 3.20 ppm |
2016-01-07 | 6010110-07 | 5.10 ppm |
2016-01-07 | 6010110-04 | 3.40 ppm |
2016-01-07 | 6010110-02 | 4.10 ppm |
2016-01-07 | 6010110-05 | 6.20 ppm |
2016-01-07 | 6010110-03 | 4.70 ppm |
2016-01-07 | 6010110-09 | 3.50 ppm |
2016-01-07 | 6010110-10 | 3.00 ppm |
2016-01-07 | 6010110-11 | 4.00 ppm |
2016-01-07 | 6010110-08 | 3.30 ppm |
2016-01-07 | 6010110-12 | 4.80 ppm |
2016-01-08 | 6010173-01 | 2.80 ppm |
2016-01-08 | 6010173-02 | 3.40 ppm |
2016-04-06 | 6040180-04 | 5.90 ppm |
2016-04-06 | 6040180-06 | 3.30 ppm |
2016-04-06 | 6040180-05 | 5.00 ppm |
2016-04-06 | 6040180-02 | 3.50 ppm |
2016-04-06 | 6040180-03 | 6.40 ppm |
2016-04-06 | 6040180-01 | 5.20 ppm |
2016-04-06 | 6040180-08 | 3.20 ppm |
2016-04-06 | 6040180-07 | 3.40 ppm |
2016-04-06 | 6040180-09 | 4.80 ppm |
2016-04-19 | 6040629-02 | 5.40 ppm |
2016-04-19 | 6040629-01 | 3.40 ppm |
2016-05-03 | 6050075-01 | 3.30 ppm |
2016-05-11 | 6050372-04 | 3.20 ppm |
2016-07-06 | 6070112-06 | 6.20 ppm |
2016-07-06 | 6070112-09 | 3.00 ppm |
2016-07-06 | 6070112-07 | 5.00 ppm |
2016-07-06 | 6070112-04 | 3.70 ppm |
2016-07-06 | 6070112-01 | 3.20 ppm |
2016-07-06 | 6070112-08 | 4.60 ppm |
2016-07-06 | 6070112-02 | 2.90 ppm |
2016-07-06 | 6070112-05 | 6.10 ppm |
2016-07-06 | 6070112-03 | 5.30 ppm |
2016-07-06 | 6070112-11 | 3.10 ppm |
2016-07-06 | 6070112-10 | 3.20 ppm |
2016-07-06 | 6070112-14 | 3.30 ppm |
2016-07-06 | 6070112-13 | 2.40 ppm |
2016-07-06 | 6070112-12 | 2.20 ppm |
2016-07-06 | 6070112-15 | 4.30 ppm |
2016-10-11 | 6100288-07 | 5.80 ppm |
2016-10-11 | 6100288-06 | 4.80 ppm |
2016-10-11 | 6100288-11 | 3.20 ppm |
2016-10-11 | 6100288-08 | 5.10 ppm |
2016-10-11 | 6100288-04 | 5.00 ppm |
2016-10-11 | 6100288-03 | 3.80 ppm |
2016-10-11 | 6100288-09 | 4.70 ppm |
2016-10-11 | 6100288-01 | 3.50 ppm |
2016-10-11 | 6100288-05 | 6.00 ppm |
2016-10-11 | 6100288-02 | 5.20 ppm |
2016-10-11 | 6100288-10 | 3.90 ppm |
2016-10-11 | 6100288-13 | 3.10 ppm |
2016-10-11 | 6100288-12 | 3.40 ppm |
2016-10-11 | 6100288-14 | 3.50 ppm |
2016-10-11 | 6100288-15 | 4.80 ppm |
2017-01-18 | 7010444-04 | 6.00 ppm |
2017-01-18 | 7010444-07 | 3.90 ppm |
2017-01-18 | 7010444-05 | 4.70 ppm |
2017-01-18 | 7010444-03 | 4.80 ppm |
2017-01-18 | 7010444-02 | 3.60 ppm |
2017-01-18 | 7010444-06 | 5.20 ppm |
2017-01-18 | 7010444-01 | 5.00 ppm |
2017-01-18 | 7010444-10 | 3.40 ppm |
2017-01-18 | 7010444-11 | 4.40 ppm |
2017-01-18 | 7010444-12 | 3.00 ppm |
2017-01-18 | 7010444-14 | 3.90 ppm |
2017-01-18 | 7010444-13 | 3.90 ppm |
2017-01-18 | 7010444-08 | 3.90 ppm |
2017-01-18 | 7010444-09 | 3.10 ppm |
2017-01-18 | 7010444-15 | 3.20 ppm |
2017-01-18 | 7010444-16 | 4.60 ppm |
2017-01-24 | 7010573-01 | 4.00 ppm |
2017-04-18 | 7040506-04 | 8.10 ppm |
2017-04-18 | 7040506-06 | 5.90 ppm |
2017-04-18 | 7040506-05 | 5.20 ppm |
2017-04-20 | 7040580-05 | 6.00 ppm |
2017-04-20 | 7040580-01 | 4.10 ppm |
2017-04-20 | 7040580-10 | 5.40 ppm |
2017-04-20 | 7040580-03 | 5.60 ppm |
2017-04-20 | 7040580-02 | 3.70 ppm |
2017-04-20 | 7040580-04 | 5.10 ppm |
2017-04-20 | 7040580-07 | 4.20 ppm |
2017-04-20 | 7040580-08 | 4.10 ppm |
2017-04-20 | 7040580-06 | 4.10 ppm |
2017-04-20 | 7040580-09 | 3.80 ppm |
2017-05-10 | 7050367-02 | 3.10 ppm |
2017-05-10 | 7050367-01 | 2.00 ppm |
2017-05-17 | 7050640-03 | 2.40 ppm |
2017-07-05 | 7070048-06 | 4.70 ppm |
2017-07-05 | 7070048-10 | 2.50 ppm |
2017-07-05 | 7070048-07 | 4.90 ppm |
2017-07-05 | 7070048-04 | 3.90 ppm |
2017-07-05 | 7070048-03 | 2.70 ppm |
2017-07-05 | 7070025-01 | 3.80 ppm |
2017-07-05 | 7070048-08 | 3.80 ppm |
2017-07-05 | 7070048-01 | 2.40 ppm |
2017-07-05 | 7070048-05 | 4.90 ppm |
2017-07-05 | 7070048-02 | 4.10 ppm |
2017-07-05 | 7070048-09 | 3.30 ppm |
2017-07-05 | 7070048-12 | 2.90 ppm |
2017-07-05 | 7070048-11 | 2.80 ppm |
2017-07-05 | 7070048-15 | 3.00 ppm |
2017-07-05 | 7070048-14 | 2.20 ppm |
2017-07-05 | 7070048-13 | 2.30 ppm |
2017-10-03 | 7100035-07 | 6.00 ppm |
2017-10-03 | 7100035-06 | 4.70 ppm |
2017-10-03 | 7100035-08 | 2.80 ppm |
2017-10-03 | 7100035-12 | 2.40 ppm |
2017-10-03 | 7100035-09 | 5.00 ppm |
2017-10-03 | 7100035-04 | 3.30 ppm |
2017-10-03 | 7100035-03 | 2.40 ppm |
2017-10-03 | 7100035-10 | 4.60 ppm |
2017-10-03 | 7100035-01 | 2.00 ppm |
2017-10-03 | 7100035-05 | 6.10 ppm |
2017-10-03 | 7100035-02 | 3.60 ppm |
2017-10-03 | 7100035-11 | 3.70 ppm |
2017-10-03 | 7100035-14 | 3.30 ppm |
2017-10-03 | 7100035-13 | 3.20 ppm |
2017-10-03 | 7100035-15 | 3.30 ppm |
2018-01-03 | 8010030-05 | 2.70 ppm |
2018-01-03 | 8010030-04 | 3.30 ppm |
2018-01-03 | 8010030-03 | 3.40 ppm |
2018-01-03 | 8010030-02 | 2.40 ppm |
2018-01-03 | 8010030-01 | 3.40 ppm |
2018-01-03 | 8010030-06 | 2.90 ppm |
2018-01-03 | 8010030-07 | 3.20 ppm |
2018-01-03 | 8010030-08 | 3.70 ppm |
2018-01-09 | 8010168-03 | 5.50 ppm |
2018-01-09 | 8010168-04 | 2.80 ppm |
2018-01-09 | 8010168-01 | 3.30 ppm |
2018-01-09 | 8010168-02 | 6.50 ppm |
2018-01-09 | 8010168-05 | 4.20 ppm |
2018-01-09 | 8010168-06 | 2.70 ppm |
2018-01-19 | 8010486-03 | 5.60 ppm |
2018-01-19 | 8010486-04 | 2.50 ppm |
2018-01-19 | 8010486-01 | 3.60 ppm |
2018-01-19 | 8010486-02 | 6.60 ppm |
2018-01-19 | 8010486-05 | 4.00 ppm |
2018-01-19 | 8010486-06 | 2.90 ppm |
2018-02-05 | 8020087-03 | 3.00 ppm |
2018-04-03 | 8040027-06 | 5.80 ppm |
2018-04-03 | 8040027-01 | 2.80 ppm |
2018-04-03 | 8040027-07 | 5.10 ppm |
2018-04-03 | 8040027-04 | 4.60 ppm |
2018-04-03 | 8040027-03 | 2.80 ppm |
2018-04-03 | 8040027-08 | 4.40 ppm |
2018-04-03 | 8040027-05 | 6.10 ppm |
2018-04-03 | 8040027-02 | 5.00 ppm |
2018-04-03 | 8040027-09 | 3.60 ppm |
2018-04-03 | 8040027-11 | 3.50 ppm |
2018-04-03 | 8040027-10 | 3.20 ppm |
2018-04-04 | 8040074-03 | 1.30 ppm |
2018-04-04 | 8040074-05 | 2.90 ppm |
2018-04-26 | 8040945-02 | 2.50 ppm |
2018-04-26 | 8040945-01 | 3.10 ppm |
2018-07-02 | 8070013-07 | 6.50 ppm |
2018-07-02 | 8070013-11 | 3.00 ppm |
2018-07-02 | 8070013-08 | 5.50 ppm |
2018-07-02 | 8070013-05 | 5.00 ppm |
2018-07-02 | 8070013-04 | 3.00 ppm |
2018-07-02 | 8070013-01 | 3.40 ppm |
2018-07-02 | 8070013-09 | 4.90 ppm |
2018-07-02 | 8070013-02 | 2.70 ppm |
2018-07-02 | 8070013-06 | 6.70 ppm |
2018-07-02 | 8070013-03 | 5.60 ppm |
2018-07-02 | 8070013-10 | 3.90 ppm |
2018-07-02 | 8070013-13 | 3.80 ppm |
2018-07-02 | 8070013-14 | 3.00 ppm |
2018-07-02 | 8070013-12 | 3.20 ppm |
2018-07-02 | 8070013-16 | 3.20 ppm |
2018-07-02 | 8070013-15 | 2.10 ppm |
2018-10-02 | 8100082-08 | 5.90 ppm |
2018-10-02 | 8100082-07 | 4.70 ppm |
2018-10-02 | 8100082-09 | 4.50 ppm |
2018-10-02 | 8100082-01 | 3.00 ppm |
2018-10-02 | 8100082-05 | 4.80 ppm |
2018-10-02 | 8100082-04 | 2.90 ppm |
2018-10-02 | 8100082-02 | 3.00 ppm |
2018-10-02 | 8100082-06 | 6.30 ppm |
2018-10-02 | 8100082-03 | 4.40 ppm |
2018-10-03 | 8100136-01 | 5.40 ppm |
2018-10-03 | 8100136-02 | 4.70 ppm |
2018-10-03 | 8100136-03 | 3.90 ppm |
2018-10-03 | 8100136-05 | 3.40 ppm |
2018-10-03 | 8100136-06 | 2.50 ppm |
2018-10-03 | 8100136-04 | 2.90 ppm |
2018-10-03 | 8100136-07 | 3.10 ppm |
2019-01-10 | 9010342-02 | 6.51 ppm |
2019-01-10 | 9010342-06 | 3.63 ppm |
2019-01-10 | 9010342-03 | 6.68 ppm |
2019-01-10 | 9010342-01 | 5.29 ppm |
2019-01-10 | 9010342-09 | 1.55 ppm |
2019-01-10 | 9010342-04 | 5.59 ppm |
2019-01-10 | 9010342-08 | 4.05 ppm |
2019-01-10 | 9010342-05 | 4.80 ppm |
2019-01-10 | 9010342-15 | 3.32 ppm |
2019-01-10 | 9010342-14 | 3.82 ppm |
2019-01-10 | 9010342-13 | 3.25 ppm |
2019-01-10 | 9010342-11 | 3.20 ppm |
2019-01-10 | 9010342-12 | 4.02 ppm |
2019-01-10 | 9010342-07 | 3.40 ppm |
2019-01-10 | 9010342-16 | 3.05 ppm |
2019-01-10 | 9010342-10 | 3.84 ppm |
2019-04-10 | 9040481-02 | 4.66 ppm |
2019-04-10 | 9040481-06 | 4.25 ppm |
2019-04-10 | 9040481-12 | 6.85 ppm |
2019-04-10 | 9040481-07 | 4.02 ppm |
2019-04-10 | 9040481-11 | 2.97 ppm |
2019-04-10 | 9040481-10 | 5.32 ppm |
2019-04-10 | 9040481-09 | 6.32 ppm |
2019-04-10 | 9040481-01 | 5.28 ppm |
2019-04-10 | 9040481-03 | 5.04 ppm |
2019-04-10 | 9040481-08 | 3.89 ppm |
2019-04-10 | 9040481-05 | 4.04 ppm |
2019-04-10 | 9040481-04 | 4.55 ppm |
2019-07-24 | 9071191-08 | 5.36 ppm |
2019-07-24 | 9071191-14 | 3.57 ppm |
2019-07-24 | 9071191-02 | 6.11 ppm |
2019-07-24 | 9071191-01 | 5.03 ppm |
2019-07-24 | 9071191-05 | 3.90 ppm |
2019-07-24 | 9071191-09 | 3.24 ppm |
2019-07-24 | 9071191-11 | 6.72 ppm |
2019-07-24 | 9071191-07 | 6.27 ppm |
2019-07-24 | 9071191-06 | 4.23 ppm |
2019-07-24 | 9071191-10 | 4.30 ppm |
2019-07-24 | 9071191-03 | 3.48 ppm |
2019-07-24 | 9071191-13 | 3.35 ppm |
2019-07-24 | 9071191-12 | 3.76 ppm |
2019-07-24 | 9071191-04 | 2.65 ppm |
2019-09-19 | 9090882-01 | 3.20 ppm |
2019-10-09 | 9100466-06 | 5.30 ppm |
2019-10-09 | 9100466-07 | 4.00 ppm |
2019-10-09 | 9100466-13 | 3.10 ppm |
2019-10-09 | 9100466-03 | 5.50 ppm |
2019-10-09 | 9100466-01 | 5.00 ppm |
2019-10-09 | 9100466-11 | 3.50 ppm |
2019-10-09 | 9100466-09 | 6.00 ppm |
2019-10-09 | 9100466-05 | 5.80 ppm |
2019-10-09 | 9100466-08 | 3.30 ppm |
2019-10-09 | 9100466-04 | 3.10 ppm |
2019-10-09 | 9100466-12 | 3.80 ppm |
2019-10-09 | 9100466-10 | 3.60 ppm |
2019-10-09 | 9100466-02 | 3.10 ppm |
2019-12-04 | 9120094-01 | 2.50 ppm |