Know Your Environment. Protect Your Health.

Nitrate and nitrite

Terra Bella Irrigation District - Tbt

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
20191.02 ppm93ND - 5.70 ppm
20200.280 ppm42ND - 0.640 ppm
2021ND30ND
20220.280 ppm51ND - 1.40 ppm
20230.275 ppm41ND - 1.10 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

ppm = parts per million

All test results

Date Lab ID Result
2018-09-17CA5410038_001_001-201809171140ND
2018-09-24CA5410038_027_027-201809241445ND
2018-09-24CA5410038_032_032-201809241300ND
2019-08-29CA5410038_020_020-201908291222ND
2019-08-29CA5410038_004_004-2019082911142.10 ppm
2019-08-29CA5410038_002_002-201908291226ND
2019-08-29CA5410038_009_009-201908291228ND
2019-08-29CA5410038_025_025-2019082913001.40 ppm
2019-08-29CA5410038_016_016-201908291216ND
2019-08-29CA5410038_014_014-201908291125ND
2019-08-29CA5410038_013_013-2019082911085.70 ppm
2019-08-29CA5410038_001_001-201908291400ND
2020-08-27CA5410038_001_001-202008271300ND
2020-08-31CA5410038_024_024-2020083113040.480 ppm
2020-11-30CA5410038_024_024-2020113012250.640 ppm
2020-12-29CA5410038_028_028-202012291250ND
2021-08-23CA5410038_001_001-202108231210ND
2021-09-13CA5410038_027_027-202109131310ND
2021-09-13CA5410038_032_032-202109131219ND
2022-08-15CA5410038_001_001-202208151150ND
2022-09-19CA5410038_009_009-202209191158ND
2022-09-19CA5410038_020_020-202209191152ND
2022-09-19CA5410038_025_025-2022091912321.40 ppm
2022-09-19CA5410038_016_016-202209191148ND
2023-03-28CA5410038_002_002-202303281235ND
2023-07-24CA5410038_001_001-202307241220ND
2023-09-12CA5410038_024_024-2023091212201.10 ppm
2023-12-04CA5410038_028_028-202312041315ND