Drinking water quality · 2025
What's in Sudbury Water District, MA tap water
1 contaminants were measured in the Sudbury Water District, MA water system's 2025 annual report. Each is shown below against its federal limit.
- Reporting year
- 2025
- Contaminants measured
- 1
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- MA
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.
- Maximum contaminant level exceededHealth-based9 violations on record · most recent Jun 1997resolved
- Treatment technique violationHealth-based1 violation on record · most recent Aug 20251 open
- Monitoring & reporting3 violations on record · most recent Jun 20223 open
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. | 0.0035 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
People also ask about Sudbury Water District, MA's water
+Is Sudbury Water District, MA tap water safe to drink in 2025?
Every one of the 1 contaminants measured in Sudbury Water District, MA's 2025 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 Sudbury Water District, MA tap water?
1 contaminants were measured in Sudbury Water District, MA's 2025 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 Sudbury Water District, MA's 2025 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 Sudbury Water District, MA'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 2025 report; a new report will replace it once the utility publishes its next annual update.