Chromium (total)
Cws - Upper Bodfish Water System
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
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 | ND | 20 | 0 | ND |
| 2019 | ND | 15 | 0 | ND |
| 2020 | ND | 15 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 2.03 ppb | 37 | 32 | ND - 3.70 ppb |
| 2023 | 1.32 ppb | 28 | 27 | ND - 1.90 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-17 | CA1510026_007_007-201801171059 | ND |
| 2018-02-21 | CA1510026_005_005-201802211343 | ND |
| 2018-02-21 | CA1510026_004_004-201802211334 | ND |
| 2018-02-21 | CA1510026_007_007-201802211325 | ND |
| 2018-03-13 | CA1510026_007_007-201803131316 | ND |
| 2018-03-13 | CA1510026_006_006-201803131300 | ND |
| 2018-04-04 | CA1510026_007_007-201804041042 | ND |
| 2018-05-31 | CA1510026_004_004-201805311322 | ND |
| 2018-05-31 | CA1510026_005_005-201805311327 | ND |
| 2018-05-31 | CA1510026_007_007-201805311333 | ND |
| 2018-06-12 | CA1510026_007_007-201806121429 | ND |
| 2018-07-16 | CA1510026_007_007-201807161325 | ND |
| 2018-08-01 | CA1510026_004_004-201808011356 | ND |
| 2018-08-01 | CA1510026_005_005-201808011401 | ND |
| 2018-08-01 | CA1510026_007_007-201808011408 | ND |
| 2018-08-08 | CA1510026_007_007-201808081446 | ND |
| 2018-08-13 | CA1510026_DST_902-201808131227 | ND |
| 2018-08-13 | CA1510026_DST_901-201808131219 | ND |
| 2018-09-06 | CA1510026_007_007-201809061336 | ND |
| 2018-12-10 | CA1510026_007_007-201812101100 | ND |
| 2019-01-22 | CA1510026_007_007-201901221110 | ND |
| 2019-02-06 | CA1510026_005_005-201902061255 | ND |
| 2019-02-06 | CA1510026_007_007-201902061227 | ND |
| 2019-02-06 | CA1510026_004_004-201902061245 | ND |
| 2019-02-25 | CA1510026_005_005-201902251210 | ND |
| 2019-02-25 | CA1510026_004_004-201902251200 | ND |
| 2019-03-27 | CA1510026_007_007-201903271045 | ND |
| 2019-04-09 | CA1510026_006_006-201904091320 | ND |
| 2019-04-09 | CA1510026_007_007-201904091343 | ND |
| 2019-06-05 | CA1510026_007_007-201906051153 | ND |
| 2019-10-15 | CA1510026_007_007-201910151215 | ND |
| 2019-11-19 | CA1510026_005_005-201911191348 | ND |
| 2019-11-19 | CA1510026_004_004-201911191345 | ND |
| 2019-11-19 | CA1510026_006_006-201911191350 | ND |
| 2019-11-19 | CA1510026_007_007-201911191352 | ND |
| 2020-02-04 | CA1510026_005_005-202002041310 | ND |
| 2020-02-04 | CA1510026_007_007-202002041250 | ND |
| 2020-04-01 | CA1510026_007_007-202004011333 | ND |
| 2020-04-01 | CA1510026_006_006-202004011345 | ND |
| 2020-06-08 | CA1510026_006_006-202006081125 | ND |
| 2020-06-08 | CA1510026_007_007-202006081115 | ND |
| 2020-08-05 | CA1510026_006_006-202008051150 | ND |
| 2020-08-05 | CA1510026_007_007-202008051121 | ND |
| 2020-08-05 | CA1510026_005_005-202008051201 | ND |
| 2020-08-18 | CA1510026_004_004-202008181007 | ND |
| 2020-08-18 | CA1510026_005_005-202008181011 | ND |
| 2020-08-18 | CA1510026_006_006-202008181002 | ND |
| 2020-08-18 | CA1510026_007_007-202008180955 | ND |
| 2020-10-20 | CA1510026_006_006-202010201129 | ND |
| 2020-10-20 | CA1510026_007_007-202010201139 | ND |
| 2022-02-17 | CA1510026_004_004-202202170920 | ND |
| 2022-02-24 | CA1510026_005_005-202202241144 | ND |
| 2022-03-15 | CA1510026_007_007-202203150932 | 2.50 ppb |
| 2022-03-15 | CA1510026_006_006-202203150927 | 1.90 ppb |
| 2022-04-06 | CA1510026_006_006-202204061420 | 3.40 ppb |
| 2022-04-06 | CA1510026_007_007-202204061425 | 2.80 ppb |
| 2022-04-19 | CA1510026_006_006-202204191317 | 2.80 ppb |
| 2022-04-19 | CA1510026_007_007-202204191312 | 2.60 ppb |
| 2022-05-03 | CA1510026_004_004-202205031159 | 1.70 ppb |
| 2022-05-03 | CA1510026_005_005-202205031204 | 2.50 ppb |
| 2022-05-03 | CA1510026_006_006-202205031153 | 2.50 ppb |
| 2022-05-03 | CA1510026_007_007-202205031143 | 2.30 ppb |
| 2022-05-03 | CA1510026_004_004-202205031159 | 2.60 ppb |
| 2022-05-03 | CA1510026_007_007-202205031143 | 2.60 ppb |
| 2022-05-03 | CA1510026_005_005-202205031204 | 2.30 ppb |
| 2022-05-03 | CA1510026_006_006-202205031153 | 2.10 ppb |
| 2022-06-01 | CA1510026_006_006-202206011149 | 2.70 ppb |
| 2022-06-01 | CA1510026_007_007-202206011143 | 2.60 ppb |
| 2022-06-01 | CA1510026_007_007-202206011143 | 2.80 ppb |
| 2022-06-01 | CA1510026_006_006-202206011149 | 2.80 ppb |
| 2022-07-13 | CA1510026_006_006-202207131349 | 2.60 ppb |
| 2022-07-13 | CA1510026_007_007-202207131404 | 2.20 ppb |
| 2022-07-13 | CA1510026_007_007-202207131404 | 2.40 ppb |
| 2022-07-13 | CA1510026_006_006-202207131349 | 3.70 ppb |
| 2022-08-10 | CA1510026_005_005-202208101411 | 1.70 ppb |
| 2022-08-10 | CA1510026_005_005-202208101411 | 2.00 ppb |
| 2022-08-10 | CA1510026_007_007-202208101424 | 1.40 ppb |
| 2022-08-10 | CA1510026_007_007-202208101424 | 1.90 ppb |
| 2022-08-10 | CA1510026_006_006-202208101400 | 1.90 ppb |
| 2022-10-06 | CA1510026_007_007-202210061047 | ND |
| 2022-10-11 | CA1510026_007_007-202210111320 | 2.20 ppb |
| 2022-10-11 | CA1510026_007_007-202210111320 | ND |
| 2022-10-11 | CA1510026_006_006-202210111327 | ND |
| 2022-10-11 | CA1510026_006_006-202210111327 | 2.50 ppb |
| 2022-12-06 | CA1510026_007_007-202212061115 | 1.80 ppb |
| 2022-12-06 | CA1510026_007_007-202212061115 | 1.50 ppb |
| 2022-12-06 | CA1510026_006_006-202212061122 | 1.80 ppb |
| 2023-02-01 | CA1510026_007_007-202302011515 | 1.30 ppb |
| 2023-02-06 | CA1510026_005_005-202302061217 | 1.30 ppb |
| 2023-02-06 | CA1510026_006_006-202302061206 | 1.000 ppb |
| 2023-02-06 | CA1510026_005_005-202302061217 | 1.10 ppb |
| 2023-02-06 | CA1510026_006_006-202302061206 | 1.10 ppb |
| 2023-02-06 | CA1510026_007_007-202302061158 | ND |
| 2023-03-06 | CA1510026_007_007-202303061010 | 1.20 ppb |
| 2023-03-06 | CA1510026_006_006-202303060954 | 1.20 ppb |
| 2023-04-11 | CA1510026_006_006-202304111356 | 1.000 ppb |
| 2023-04-12 | CA1510026_007_007-202304121220 | 1.10 ppb |
| 2023-05-08 | CA1510026_004_004-202305081140 | 1.90 ppb |
| 2023-05-08 | CA1510026_005_005-202305081144 | 1.60 ppb |
| 2023-05-08 | CA1510026_006_006-202305081127 | 1.60 ppb |
| 2023-05-08 | CA1510026_007_007-202305081135 | 1.40 ppb |
| 2023-06-06 | CA1510026_006_006-202306061147 | 1.60 ppb |
| 2023-06-06 | CA1510026_007_007-202306061152 | 1.80 ppb |
| 2023-07-11 | CA1510026_007_007-202307111418 | 1.30 ppb |
| 2023-07-12 | CA1510026_006_006-202307121145 | 1.40 ppb |
| 2023-08-09 | CA1510026_005_005-202308091336 | 1.30 ppb |
| 2023-08-09 | CA1510026_004_004-202308091333 | 1.50 ppb |
| 2023-08-09 | CA1510026_006_006-202308091323 | 1.40 ppb |
| 2023-08-09 | CA1510026_007_007-202308091347 | 1.40 ppb |
| 2023-10-03 | CA1510026_006_006-202310031055 | 1.50 ppb |
| 2023-10-03 | CA1510026_007_007-202310031050 | 1.40 ppb |
| 2023-11-06 | CA1510026_006_006-202311061436 | 1.30 ppb |
| 2023-11-13 | CA1510026_004_004-202311131135 | 1.40 ppb |
| 2023-11-13 | CA1510026_005_005-202311131140 | 1.40 ppb |
| 2023-11-13 | CA1510026_007_007-202311131130 | 1.50 ppb |