Drinking water quality · 1999
· Verified
What's in Contra Costa Water District, CA tap water
1 contaminants were measured in the Contra Costa Water District, CA water system's 1999 annual report. Each is shown below against its federal limit.
- Reporting year
- 1999
- Contaminants measured
- 1
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Where your water comes from · EPA SDWIS
Contra Costa Water District, CA's drinking water comes from surface water, drawn from 10 sources.
Source
- CANAL AT CLYDE
- MALLARD RESERVOIR
- MARTINEZ RESERVOIR
- CONTRA COSTA CANAL
- + 6 more
Treatment
- BOLLMAN WATER TREATMENT PLANT
Distribution
Also buys water from RANDALL-BOLD WATER TREATMENT PLANT, EAST BAY MUD.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Treatment technique violationHealth-based1 violation on record · most recent Feb 1999resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.005 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
People also ask about Contra Costa Water District, CA's water
+Is Contra Costa Water District, CA tap water safe to drink in 1999?
Every one of the 1 contaminants measured in Contra Costa Water District, CA's 1999 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Contra Costa Water District, CA tap water?
1 contaminants were measured in Contra Costa Water District, CA's 1999 Consumer Confidence Report, spanning metals. 1 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Contra Costa Water District, CA's 1999 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Contra Costa Water District, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 1999 report; a new report will replace it once the utility publishes its next annual update.