Nitrate
Fcwwd #41/shaver Lake
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.00959 ppm | 49 | 1 | ND - 0.470 ppm |
| 2019 | ND | 42 | 0 | ND |
| 2020 | ND | 35 | 0 | ND |
| 2021 | 0.0313 ppm | 31 | 2 | ND - 0.520 ppm |
| 2022 | 0.0616 ppm | 44 | 4 | ND - 0.800 ppm |
| 2023 | 0.0388 ppm | 33 | 2 | ND - 0.830 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 |
|---|---|---|
| 2018-03-12 | CA1010017_005_005-201803121119 | ND |
| 2018-03-12 | CA1010017_008_008-201803121200 | ND |
| 2018-03-12 | CA1010017_014_014-201803121310 | ND |
| 2018-03-12 | CA1010017_001_001-201803121055 | ND |
| 2018-03-12 | CA1010017_015_015-201803121341 | ND |
| 2018-03-12 | CA1010017_033_033-201803121239 | ND |
| 2018-03-14 | CA1010017_062_062-201803141234 | ND |
| 2018-03-14 | CA1010017_065_065-201803141353 | ND |
| 2018-03-14 | CA1010017_004_004-201803141053 | ND |
| 2018-03-14 | CA1010017_034_034-201803140320 | ND |
| 2018-03-16 | CA1010017_006_006-201803161041 | ND |
| 2018-03-16 | CA1010017_035_035-201803161334 | ND |
| 2018-03-16 | CA1010017_036_036-201803161304 | ND |
| 2018-03-16 | CA1010017_012_012-201803161225 | ND |
| 2018-03-16 | CA1010017_011_011-201803161212 | ND |
| 2018-03-19 | CA1010017_009_009-201803191332 | ND |
| 2018-03-19 | CA1010017_042_042-201803191207 | ND |
| 2018-03-19 | CA1010017_002_002-201803190815 | ND |
| 2018-03-21 | CA1010017_059_059-201803210958 | ND |
| 2018-04-09 | CA1010017_004_004-201804091113 | ND |
| 2018-04-09 | CA1010017_005_005-201804091117 | 0.470 ppm |
| 2018-04-09 | CA1010017_002_002-201804091055 | ND |
| 2018-04-09 | CA1010017_033_033-201804091159 | ND |
| 2018-04-09 | CA1010017_001_001-201804091058 | ND |
| 2018-04-11 | CA1010017_056_056-201804111057 | ND |
| 2018-04-11 | CA1010017_006_006-201804111318 | ND |
| 2018-04-11 | CA1010017_057_057-201804111044 | ND |
| 2018-04-11 | CA1010017_065_065-201804111229 | ND |
| 2018-04-11 | CA1010017_008_008-201804111212 | ND |
| 2018-04-11 | CA1010017_058_058-201804111030 | ND |
| 2018-04-11 | CA1010017_059_059-201804111240 | ND |
| 2018-04-13 | CA1010017_034_034-201804131345 | ND |
| 2018-04-13 | CA1010017_014_014-201804131404 | ND |
| 2018-04-13 | CA1010017_062_062-201804131313 | ND |
| 2018-04-13 | CA1010017_015_015-201804131040 | ND |
| 2018-04-13 | CA1010017_066_066-201804131325 | ND |
| 2018-04-18 | CA1010017_012_012-201804181148 | ND |
| 2018-04-18 | CA1010017_036_036-201804181054 | ND |
| 2018-04-18 | CA1010017_011_011-201804181135 | ND |
| 2018-04-18 | CA1010017_035_035-201804181037 | ND |
| 2018-04-20 | CA1010017_040_040-201804201203 | ND |
| 2018-04-20 | CA1010017_041_041-201804201149 | ND |
| 2018-04-20 | CA1010017_043_043-201804201210 | ND |
| 2018-04-20 | CA1010017_044_044-201804201225 | ND |
| 2018-04-20 | CA1010017_037_037-201804201100 | ND |
| 2018-04-20 | CA1010017_046_046-201804201040 | ND |
| 2018-04-20 | CA1010017_009_009-201804201329 | ND |
| 2018-04-20 | CA1010017_038_038-201804201123 | ND |
| 2018-04-20 | CA1010017_042_042-201804201155 | ND |
| 2019-03-27 | CA1010017_044_044-201903271020 | ND |
| 2019-06-19 | CA1010017_057_057-201906190910 | ND |
| 2019-06-19 | CA1010017_066_066-201906190957 | ND |
| 2019-06-19 | CA1010017_044_044-201906191320 | ND |
| 2019-06-19 | CA1010017_059_059-201906190955 | ND |
| 2019-06-19 | CA1010017_041_041-201906191120 | ND |
| 2019-06-19 | CA1010017_043_043-201906191310 | ND |
| 2019-06-19 | CA1010017_056_056-201906190926 | ND |
| 2019-06-19 | CA1010017_058_058-201906190855 | ND |
| 2019-06-19 | CA1010017_037_037-201906191030 | ND |
| 2019-06-19 | CA1010017_040_040-201906191115 | ND |
| 2019-06-19 | CA1010017_046_046-201906191000 | ND |
| 2019-06-19 | CA1010017_065_065-201906190940 | ND |
| 2019-06-26 | CA1010017_066_066-201906261230 | ND |
| 2019-08-28 | CA1010017_001_001-201908280940 | ND |
| 2019-08-28 | CA1010017_005_005-201908281007 | ND |
| 2019-08-28 | CA1010017_008_008-201908281243 | ND |
| 2019-08-28 | CA1010017_011_011-201908281541 | ND |
| 2019-08-28 | CA1010017_034_034-201908281152 | ND |
| 2019-08-28 | CA1010017_041_041-201908281431 | ND |
| 2019-08-28 | CA1010017_042_042-201908281426 | ND |
| 2019-08-28 | CA1010017_058_058-201908281045 | ND |
| 2019-08-28 | CA1010017_059_059-201908281213 | ND |
| 2019-08-28 | CA1010017_038_038-201908281415 | ND |
| 2019-08-28 | CA1010017_040_040-201908281435 | ND |
| 2019-08-28 | CA1010017_004_004-201908281022 | ND |
| 2019-08-28 | CA1010017_062_062-201908281128 | ND |
| 2019-08-28 | CA1010017_066_066-201908281139 | ND |
| 2019-08-28 | CA1010017_002_002-201908280945 | ND |
| 2019-08-28 | CA1010017_006_006-201908281342 | ND |
| 2019-08-28 | CA1010017_009_009-201908281610 | ND |
| 2019-08-28 | CA1010017_043_043-201908281443 | ND |
| 2019-08-28 | CA1010017_065_065-201908281237 | ND |
| 2019-08-29 | CA1010017_056_056-201908291108 | ND |
| 2019-08-29 | CA1010017_057_057-201908291120 | ND |
| 2019-12-11 | CA1010017_012_012-201912110720 | ND |
| 2019-12-11 | CA1010017_033_033-201912110830 | ND |
| 2019-12-11 | CA1010017_035_035-201912110730 | ND |
| 2019-12-11 | CA1010017_014_014-201912110815 | ND |
| 2019-12-11 | CA1010017_015_015-201912110820 | ND |
| 2019-12-11 | CA1010017_036_036-201912110735 | ND |
| 2019-12-18 | CA1010017_038_038-201912180933 | ND |
| 2020-03-11 | CA1010017_004_004-202003111144 | ND |
| 2020-03-11 | CA1010017_006_006-202003110915 | ND |
| 2020-03-11 | CA1010017_033_033-202003111052 | ND |
| 2020-03-11 | CA1010017_056_056-202003111213 | ND |
| 2020-03-11 | CA1010017_057_057-202003111220 | ND |
| 2020-03-11 | CA1010017_058_058-202003111207 | ND |
| 2020-03-11 | CA1010017_065_065-202003111009 | ND |
| 2020-03-11 | CA1010017_014_014-202003110949 | ND |
| 2020-03-11 | CA1010017_059_059-202003111012 | ND |
| 2020-03-11 | CA1010017_066_066-202003111030 | ND |
| 2020-03-11 | CA1010017_008_008-202003110955 | ND |
| 2020-03-11 | CA1010017_009_009-202003111149 | ND |
| 2020-03-11 | CA1010017_034_034-202003111023 | ND |
| 2020-03-11 | CA1010017_062_062-202003111045 | ND |
| 2020-03-11 | CA1010017_001_001-202003111120 | ND |
| 2020-03-11 | CA1010017_002_002-202003111125 | ND |
| 2020-03-11 | CA1010017_005_005-202003111137 | ND |
| 2020-03-11 | CA1010017_015_015-202003110943 | ND |
| 2020-03-11 | CA1010017_046_046-202003110920 | ND |
| 2020-04-21 | CA1010017_002_002-202004210850 | ND |
| 2020-05-06 | CA1010017_047_047-202005061050 | ND |
| 2020-05-06 | CA1010017_048_048-202005060920 | ND |
| 2020-05-06 | CA1010017_049_049-202005061025 | ND |
| 2020-12-09 | CA1010017_002_002-202012091347 | ND |
| 2020-12-09 | CA1010017_011_011-202012091230 | ND |
| 2020-12-09 | CA1010017_035_035-202012091200 | ND |
| 2020-12-09 | CA1010017_040_040-202012091138 | ND |
| 2020-12-09 | CA1010017_042_042-202012091130 | ND |
| 2020-12-09 | CA1010017_044_044-202012091147 | ND |
| 2020-12-09 | CA1010017_041_041-202012091127 | ND |
| 2020-12-09 | CA1010017_012_012-202012091245 | ND |
| 2020-12-09 | CA1010017_036_036-202012091205 | ND |
| 2020-12-21 | CA1010017_037_037-202012211230 | ND |
| 2020-12-21 | CA1010017_038_038-202012211250 | ND |
| 2020-12-21 | CA1010017_043_043-202012211240 | ND |
| 2021-03-08 | CA1010017_009_009-202103081140 | ND |
| 2021-03-08 | CA1010017_001_001-202103081300 | ND |
| 2021-04-05 | CA1010017_004_004-202104051120 | 0.520 ppm |
| 2021-04-05 | CA1010017_006_006-202104050900 | ND |
| 2021-04-05 | CA1010017_008_008-202104051100 | ND |
| 2021-04-06 | CA1010017_042_042-202104061230 | ND |
| 2021-04-06 | CA1010017_011_011-202104061245 | ND |
| 2021-04-06 | CA1010017_012_012-202104061300 | ND |
| 2021-04-12 | CA1010017_014_014-202104121400 | ND |
| 2021-04-12 | CA1010017_015_015-202104121345 | ND |
| 2021-04-13 | CA1010017_034_034-202104131155 | ND |
| 2021-04-13 | CA1010017_062_062-202104131300 | ND |
| 2021-04-13 | CA1010017_065_065-202104131235 | ND |
| 2021-04-14 | CA1010017_033_033-202104141300 | ND |
| 2021-04-14 | CA1010017_005_005-202104141326 | ND |
| 2021-04-19 | CA1010017_035_035-202104191045 | ND |
| 2021-04-19 | CA1010017_036_036-202104191055 | ND |
| 2021-04-27 | CA1010017_041_041-202104271010 | ND |
| 2021-04-27 | CA1010017_059_059-202104271130 | ND |
| 2021-04-27 | CA1010017_066_066-202104271120 | ND |
| 2021-04-27 | CA1010017_002_002-202104271300 | ND |
| 2021-04-27 | CA1010017_037_037-202104270930 | ND |
| 2021-04-27 | CA1010017_040_040-202104270950 | ND |
| 2021-04-27 | CA1010017_041_041-202104271000 | ND |
| 2021-04-27 | CA1010017_044_044-202104271015 | ND |
| 2021-04-27 | CA1010017_046_046-202104271200 | ND |
| 2021-04-27 | CA1010017_056_056-202104270855 | ND |
| 2021-04-27 | CA1010017_057_057-202104270845 | ND |
| 2021-04-27 | CA1010017_058_058-202104270835 | ND |
| 2021-06-01 | CA1010017_043_043-202106011035 | 0.450 ppm |
| 2021-11-08 | CA1010017_038_038-202111081135 | ND |
| 2022-02-11 | CA1010017_041_041-202202111400 | ND |
| 2022-02-11 | CA1010017_066_066-202202111100 | ND |
| 2022-03-02 | CA1010017_059_059-202203021255 | ND |
| 2022-03-02 | CA1010017_001_001-202203021200 | ND |
| 2022-03-02 | CA1010017_009_009-202203021420 | 0.800 ppm |
| 2022-03-02 | CA1010017_065_065-202203021240 | ND |
| 2022-03-08 | CA1010017_001_001-202203081420 | ND |
| 2022-03-08 | CA1010017_033_033-202203081225 | ND |
| 2022-03-08 | CA1010017_036_036-202203081050 | ND |
| 2022-03-08 | CA1010017_041_041-202203080915 | ND |
| 2022-03-08 | CA1010017_062_062-202203081335 | ND |
| 2022-03-08 | CA1010017_008_008-202203081215 | ND |
| 2022-03-08 | CA1010017_037_037-202203080940 | ND |
| 2022-03-08 | CA1010017_043_043-202203080910 | ND |
| 2022-03-08 | CA1010017_044_044-202203080900 | ND |
| 2022-03-08 | CA1010017_057_057-202203081350 | ND |
| 2022-03-08 | CA1010017_066_066-202203081330 | ND |
| 2022-03-08 | CA1010017_035_035-202203081045 | ND |
| 2022-03-08 | CA1010017_046_046-202203081300 | ND |
| 2022-03-08 | CA1010017_059_059-202203081320 | ND |
| 2022-03-08 | CA1010017_065_065-202203081310 | ND |
| 2022-03-08 | CA1010017_009_009-202203081200 | 0.800 ppm |
| 2022-03-08 | CA1010017_034_034-202203081325 | ND |
| 2022-03-08 | CA1010017_040_040-202203080930 | ND |
| 2022-03-08 | CA1010017_042_042-202203080925 | ND |
| 2022-03-08 | CA1010017_056_056-202203081340 | ND |
| 2022-03-08 | CA1010017_058_058-202203081400 | ND |
| 2022-04-06 | CA1010017_037_037-202204061135 | ND |
| 2022-04-06 | CA1010017_044_044-202204061030 | ND |
| 2022-04-06 | CA1010017_040_040-202204061105 | ND |
| 2022-04-06 | CA1010017_043_043-202204061045 | ND |
| 2022-04-12 | CA1010017_058_058-202204121345 | ND |
| 2022-04-12 | CA1010017_057_057-202204121325 | ND |
| 2022-04-12 | CA1010017_056_056-202204121305 | ND |
| 2022-04-19 | CA1010017_046_046-202204191300 | ND |
| 2022-04-19 | CA1010017_038_038-202204191030 | ND |
| 2022-05-13 | CA1010017_005_005-202205131235 | 0.570 ppm |
| 2022-05-13 | CA1010017_012_012-202205131325 | ND |
| 2022-05-13 | CA1010017_015_015-202205131250 | ND |
| 2022-05-13 | CA1010017_002_002-202205131205 | ND |
| 2022-05-13 | CA1010017_004_004-202205131225 | 0.540 ppm |
| 2022-05-13 | CA1010017_006_006-202205131255 | ND |
| 2022-05-13 | CA1010017_011_011-202205131315 | ND |
| 2022-05-13 | CA1010017_014_014-202205131245 | ND |
| 2023-04-24 | CA1010017_048_048-202304241140 | ND |
| 2023-04-24 | CA1010017_049_049-202304241210 | ND |
| 2023-04-24 | CA1010017_047_047-202304241125 | ND |
| 2023-04-24 | CA1010017_002_002-202304241100 | ND |
| 2023-05-16 | CA1010017_033_033-202305161300 | ND |
| 2023-05-16 | CA1010017_035_035-202305161000 | ND |
| 2023-05-16 | CA1010017_038_038-202305161015 | ND |
| 2023-05-16 | CA1010017_065_065-202305161220 | ND |
| 2023-05-16 | CA1010017_037_037-202305161010 | 0.450 ppm |
| 2023-05-16 | CA1010017_044_044-202305161050 | ND |
| 2023-05-16 | CA1010017_008_008-202305161235 | ND |
| 2023-05-16 | CA1010017_014_014-202305161240 | ND |
| 2023-05-16 | CA1010017_034_034-202305161205 | ND |
| 2023-05-16 | CA1010017_036_036-202305161005 | ND |
| 2023-05-16 | CA1010017_040_040-202305161040 | ND |
| 2023-05-16 | CA1010017_041_041-202305161030 | ND |
| 2023-05-16 | CA1010017_056_056-202305161140 | ND |
| 2023-05-16 | CA1010017_057_057-202305161135 | ND |
| 2023-05-16 | CA1010017_058_058-202305161130 | ND |
| 2023-05-16 | CA1010017_015_015-202305161245 | ND |
| 2023-05-16 | CA1010017_043_043-202305161045 | ND |
| 2023-05-16 | CA1010017_059_059-202305161210 | ND |
| 2023-05-16 | CA1010017_062_062-202305161155 | ND |
| 2023-05-18 | CA1010017_001_001-202305180815 | ND |
| 2023-05-18 | CA1010017_004_004-202305180900 | ND |
| 2023-05-18 | CA1010017_009_009-202305180945 | ND |
| 2023-05-18 | CA1010017_006_006-202305181350 | ND |
| 2023-05-18 | CA1010017_046_046-202305181410 | ND |
| 2023-05-18 | CA1010017_005_005-202305180910 | 0.830 ppm |
| 2023-05-18 | CA1010017_011_011-202305181200 | ND |
| 2023-05-18 | CA1010017_012_012-202305181215 | ND |
| 2023-05-18 | CA1010017_066_066-202305180930 | ND |
| 2023-09-01 | CA1010017_042_042-202309011300 | ND |