Contra Costa Water District
Contra Costa County, CA
CA0710003
Contaminants Exceeding Limits
The following contaminants have exceeded the guideline limits at least once in the past ten years.
- GR
Gross Beta Particle Activity
Gross Beta Particle Activity measures radioactivity from beta-emitting particles in water. Sources include nuclear facilities and certain minerals. It increases cancer risk.
Other Contaminants Detected
The following contaminants have been detected, but not exceeded the guideline limits in the past ten years.
Arsenic
44 detections
| Avg Result: | 2.216 ppb |
|---|---|
| Limit: | 10.000 ppb |
Asbestos
1 detection
| Avg Result: | 0.003 mfl |
|---|---|
| Limit: | 7.000 mfl |
Barium
7 detections
| Avg Result: | 0.016 ppm |
|---|---|
| Limit: | 2.000 ppm |
Bromate
8 detections
| Avg Result: | 1.162 ppb |
|---|---|
| Limit: | 10.000 ppb |
Bromodichloromethane
42 detections
| Avg Result: | 6.674 ppb |
|---|---|
| Limit: | 80.000 ppb |
Bromoform
28 detections
| Avg Result: | 5.785 ppb |
|---|---|
| Limit: | 80.000 ppb |
Contaminants tested
Contaminants that have been tested but not detected
Summary
- People Served
- 198K
- Surface Water
- Contra Costa County
- Data from 2014-2023
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