Picloram
Ely Municipal Water Department
Picloram is a herbicide that in studies of laboratory animals has been linked with reduced testicular size and damage to the liver and thyroid.
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 | 0.290 ppb | 1 | 1 | 0.290 ppb |
| 2019 | 0.420 ppb | 2 | 1 | ND - 0.840 ppb |
| 2020 | 0.720 ppb | 1 | 1 | 0.720 ppb |
| 2021 | 0.313 ppb | 3 | 3 | 0.280 ppb - 0.380 ppb |
| 2022 | 0.0640 ppb | 5 | 1 | ND - 0.320 ppb |
| 2023 | 0.0700 ppb | 2 | 1 | ND - 0.140 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 166 ppb
The EWG Health Guideline of 166 ppb for picloram was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against change to internal organs.
EPA Maximum Contaminant
Level (MCL): 500 ppb
The legal limit for picloram, established in 1992, was based on toxicity studies in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-28 | 201803300634 | 0.290 ppb |
| 2019-03-07 | 201903140398 | 0.840 ppb |
| 2019-09-26 | 201910010466 | ND |
| 2020-03-12 | 202003170139 | 0.720 ppb |
| 2021-03-25 | 202103300423 | 0.280 ppb |
| 2021-03-25 | 21030759-001A | 0.280 ppb |
| 2021-12-09 | 202112150655 | 0.380 ppb |
| 2022-03-10 | 202203160074 | 0.320 ppb |
| 2022-05-12 | 380-1966-1 | ND |
| 2022-07-07 | 380-9979-1 | ND |
| 2022-08-25 | 810-36089-1 | ND |
| 2022-08-25 | 810-36089-2 | ND |
| 2023-05-10 | 380-47459-1 | ND |
| 2023-11-08 | 380-71012-1 | 0.140 ppb |