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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Ridge Creek Water Company LLC

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
20150.166 ppm2216ND - 0.510 ppm
2016N/A00N/A
20170.168 ppm2216ND - 0.450 ppm
20180.196 ppm2216ND - 0.540 ppm
20190.203 ppm2216ND - 0.580 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
2015-09-01AC54715ND
2015-09-01AC547080.180 ppm
2015-09-01AC546990.170 ppm
2015-09-01AC547000.170 ppm
2015-09-01AC547070.120 ppm
2015-09-01AC547180.0200 ppm
2015-09-01AC54711ND
2015-09-01AC54712ND
2015-09-01AC547130.0310 ppm
2015-09-01AC54714ND
2015-09-01AC547020.240 ppm
2015-09-01AC547190.510 ppm
2015-09-01AC547170.460 ppm
2015-09-01AC547160.300 ppm
2015-09-01AC54710ND
2015-09-01AC547030.180 ppm
2015-09-01AC547040.140 ppm
2015-09-01AC547050.220 ppm
2015-09-01AC547060.120 ppm
2015-09-01AC547090.460 ppm
2015-09-01AC547010.340 ppm
2015-09-01AC54720ND
2017-08-10AD01920ND
2017-08-10AD019160.0460 ppm
2017-08-10AD01908ND
2017-08-10AD01921ND
2017-08-10AD019230.130 ppm
2017-08-10AD019070.250 ppm
2017-08-10AD019050.140 ppm
2017-08-10AD019130.200 ppm
2017-08-10AD01909ND
2017-08-10AD01914ND
2017-08-10AD019060.320 ppm
2017-08-10AD01911ND
2017-08-10AD019240.290 ppm
2017-08-10AD019150.430 ppm
2017-08-10AD019180.240 ppm
2017-08-10AD019100.130 ppm
2017-08-10AD019190.220 ppm
2017-08-10AD019120.200 ppm
2017-08-10AD019220.440 ppm
2017-08-10AD019040.0180 ppm
2017-08-10AD019170.200 ppm
2017-08-10AD019030.450 ppm
2018-07-23AD294500.230 ppm
2018-07-23AD29459ND
2018-07-23AD294540.160 ppm
2018-07-23AD294530.240 ppm
2018-07-23AD294510.540 ppm
2018-07-23AD294490.230 ppm
2018-07-23AD294520.270 ppm
2018-07-24AD294660.500 ppm
2018-07-24AD29469ND
2018-07-24AD294680.540 ppm
2018-07-24AD294670.0220 ppm
2018-07-24AD294650.320 ppm
2018-07-24AD29464ND
2018-07-24AD29463ND
2018-07-24AD29461ND
2018-07-24AD29460ND
2018-07-24AD294580.320 ppm
2018-07-24AD294620.0410 ppm
2018-07-24AD294570.280 ppm
2018-07-24AD294560.160 ppm
2018-07-24AD294550.140 ppm
2018-07-24AD294480.310 ppm
2019-07-18AD523440.340 ppm
2019-07-18AD523450.250 ppm
2019-07-18AD523460.160 ppm
2019-07-18AD52347ND
2019-07-18AD523480.410 ppm
2019-07-18AD523490.250 ppm
2019-07-18AD523500.290 ppm
2019-07-18AD523510.580 ppm
2019-07-18AD523520.0580 ppm
2019-07-18AD523530.550 ppm
2019-07-18AD52354ND
2019-07-18AD523430.170 ppm
2019-07-18AD523420.320 ppm
2019-07-18AD52341ND
2019-07-18AD523400.330 ppm
2019-07-18AD523390.150 ppm
2019-07-18AD523380.260 ppm
2019-07-18AD523370.0190 ppm
2019-07-18AD52336ND
2019-07-18AD52335ND
2019-07-18AD523340.320 ppm
2019-07-18AD52333ND