Know Your Environment. Protect Your Health.

Nitrate

Thousand Trails San Benito Preserve

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

139

Samples

0

Samples exceeding legal limit (MCL)

56

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0944 ppm186ND - 0.300 ppm
20190.123 ppm3112ND - 0.600 ppm
20200.129 ppm2813ND - 0.500 ppm
20210.148 ppm2311ND - 0.400 ppm
20220.215 ppm209ND - 0.700 ppm
20230.168 ppm198ND - 0.600 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

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-03-13CA3500505_002_002-201803130831ND
2018-03-13CA3500505_001_001-2018031311280.200 ppm
2018-06-11CA3500505_005_005-201806110900ND
2018-06-21CA3500505_005_005-201806211321ND
2018-08-28CA3500505_001_001-2018082812110.300 ppm
2018-08-28CA3500505_002_002-201808281140ND
2018-08-28CA3500505_005_005-201808281116ND
2018-09-18CA3500505_001_001-2018091812150.300 ppm
2018-09-18CA3500505_002_002-201809181155ND
2018-09-18CA3500505_005_005-201809181135ND
2018-10-31CA3500505_001_001-2018103108250.300 ppm
2018-10-31CA3500505_002_002-201810310800ND
2018-10-31CA3500505_005_005-201810310740ND
2018-11-14CA3500505_001_001-2018111412300.300 ppm
2018-11-27CA3500505_002_002-201811271215ND
2018-12-11CA3500505_002_002-201812111106ND
2018-12-11CA3500505_001_001-2018121111390.300 ppm
2018-12-11CA3500505_005_005-201812111035ND
2019-01-09CA3500505_005_005-201901091215ND
2019-01-09CA3500505_001_001-2019010912310.300 ppm
2019-02-11CA3500505_001_001-2019021116050.200 ppm
2019-02-11CA3500505_005_005-201902111447ND
2019-03-18CA3500505_001_001-2019031807470.300 ppm
2019-03-18CA3500505_005_005-201903181643ND
2019-03-31CA3500505_002_002-201903311720ND
2019-04-09CA3500505_005_005-201904090905ND
2019-04-09CA3500505_001_001-2019040910280.200 ppm
2019-04-09CA3500505_002_002-201904091007ND
2019-05-13CA3500505_001_001-2019051311330.300 ppm
2019-05-13CA3500505_002_002-201905130815ND
2019-05-13CA3500505_005_005-201905130835ND
2019-06-03CA3500505_002_002-201906030838ND
2019-06-03CA3500505_001_001-2019060309200.300 ppm
2019-06-03CA3500505_005_005-201906030855ND
2019-07-01CA3500505_005_005-201907011030ND
2019-07-01CA3500505_002_002-201907011052ND
2019-07-01CA3500505_001_001-2019070111150.300 ppm
2019-08-12CA3500505_005_005-201908121058ND
2019-08-12CA3500505_002_002-201908121123ND
2019-08-19CA3500505_001_001-2019081909350.400 ppm
2019-09-05CA3500505_005_005-201909050807ND
2019-09-05CA3500505_001_001-2019090509130.200 ppm
2019-10-24CA3500505_001_001-2019102411350.400 ppm
2019-10-24CA3500505_005_005-201910241055ND
2019-11-25CA3500505_005_005-201911250831ND
2019-11-25CA3500505_001_001-2019112508500.600 ppm
2019-12-23CA3500505_001_001-2019122311100.300 ppm
2019-12-23CA3500505_005_005-201912230940ND
2019-12-23CA3500505_002_002-201912231035ND
2020-01-13CA3500505_005_005-202001130952ND
2020-01-13CA3500505_002_002-202001131121ND
2020-01-13CA3500505_001_001-2020011311490.1000 ppm
2020-02-10CA3500505_001_001-2020021012350.400 ppm
2020-02-10CA3500505_002_002-2020021012140.300 ppm
2020-02-10CA3500505_005_005-202002101130ND
2020-03-17CA3500505_002_002-202003171047ND
2020-03-17CA3500505_001_001-2020031711520.400 ppm
2020-03-17CA3500505_005_005-202003171015ND
2020-04-13CA3500505_002_002-202004131358ND
2020-04-13CA3500505_001_001-2020041314260.200 ppm
2020-04-13CA3500505_005_005-202004131326ND
2020-05-19CA3500505_001_001-2020051909150.300 ppm
2020-05-19CA3500505_002_002-202005190820ND
2020-05-19CA3500505_005_005-202005190745ND
2020-06-16CA3500505_001_001-2020061610400.300 ppm
2020-06-16CA3500505_005_005-202006160940ND
2020-06-16CA3500505_002_002-2020061609130.1000 ppm
2020-07-07CA3500505_005_005-202007071002ND
2020-07-07CA3500505_001_001-2020070710190.500 ppm
2020-09-22CA3500505_005_005-202009221219ND
2020-09-22CA3500505_001_001-2020092213010.200 ppm
2020-10-08CA3500505_001_001-2020100812350.300 ppm
2020-10-08CA3500505_005_005-202010081131ND
2020-11-24CA3500505_001_001-2020112412110.400 ppm
2020-11-24CA3500505_005_005-202011241142ND
2020-12-22CA3500505_005_005-202012220829ND
2020-12-29CA3500505_001_001-2020122911570.1000 ppm
2021-01-26CA3500505_005_005-202101261230ND
2021-01-31CA3500505_001_001-2021013115180.200 ppm
2021-02-16CA3500505_001_001-2021021611170.300 ppm
2021-02-16CA3500505_005_005-202102161117ND
2021-03-15CA3500505_005_005-202103151209ND
2021-03-29CA3500505_001_001-2021032906560.400 ppm
2021-04-19CA3500505_001_001-2021041908470.200 ppm
2021-04-19CA3500505_005_005-202104191219ND
2021-05-26CA3500505_005_005-202105260833ND
2021-05-26CA3500505_001_001-2021052609160.200 ppm
2021-06-29CA3500505_005_005-202106291150ND
2021-07-27CA3500505_001_001-2021072707390.400 ppm
2021-07-27CA3500505_005_005-202107271013ND
2021-08-24CA3500505_005_005-202108240745ND
2021-08-24CA3500505_001_001-2021082408160.400 ppm
2021-09-02CA3500505_001_001-2021090212110.300 ppm
2021-09-02CA3500505_005_005-202109021139ND
2021-10-20CA3500505_001_001-2021102014200.400 ppm
2021-10-20CA3500505_005_005-202110201446ND
2021-11-30CA3500505_001_001-2021113012210.300 ppm
2021-11-30CA3500505_005_005-202111301201ND
2021-12-28CA3500505_001_001-2021122812470.300 ppm
2021-12-28CA3500505_005_005-202112281454ND
2022-01-25CA3500505_001_001-2022012512240.400 ppm
2022-01-25CA3500505_005_005-202201251153ND
2022-02-24CA3500505_001_001-2022022409180.500 ppm
2022-02-24CA3500505_005_005-202202240855ND
2022-03-14CA3500505_001_001-2022031410540.400 ppm
2022-03-14CA3500505_005_005-202203141051ND
2022-04-18CA3500505_005_005-202204180740ND
2022-05-31CA3500505_001_001-2022053110200.500 ppm
2022-05-31CA3500505_005_005-202205311000ND
2022-06-27CA3500505_005_005-202206271147ND
2022-07-27CA3500505_005_005-202207271257ND
2022-07-31CA3500505_001_001-2022073115520.400 ppm
2022-08-22CA3500505_005_005-202208220858ND
2022-08-22CA3500505_001_001-2022082210300.400 ppm
2022-09-26CA3500505_001_001-2022092611520.700 ppm
2022-09-26CA3500505_005_005-202209261105ND
2022-10-12CA3500505_001_001-2022101212310.400 ppm
2022-10-12CA3500505_005_005-202210121248ND
2022-11-28CA3500505_001_001-2022112812300.600 ppm
2022-11-28CA3500505_005_005-202211281428ND
2023-01-25CA3500505_001_001-2023012512480.600 ppm
2023-01-25CA3500505_005_005-202301251354ND
2023-02-15CA3500505_005_005-202302151232ND
2023-04-26CA3500505_005_005-202304260950ND
2023-05-17CA3500505_005_005-202305170950ND
2023-06-28CA3500505_005_005-202306281035ND
2023-06-28CA3500505_001_001-2023062811150.400 ppm
2023-07-25CA3500505_005_005-202307251300ND
2023-07-25CA3500505_001_001-2023072513250.400 ppm
2023-08-22CA3500505_001_001-2023082210410.400 ppm
2023-08-22CA3500505_005_005-202308221018ND
2023-09-25CA3500505_001_001-2023092513020.300 ppm
2023-09-26CA3500505_005_005-202309260746ND
2023-10-23CA3500505_001_001-2023102307230.400 ppm
2023-10-23CA3500505_005_005-202310230713ND
2023-11-30CA3500505_005_005-202311300757ND
2023-11-30CA3500505_001_001-2023113005420.400 ppm
2023-12-27CA3500505_005_005-202312271156ND
2023-12-27CA3500505_001_001-2023122710510.300 ppm