Is Tap Water Safe to Drink in Anaheim?
Yes, tap water in Anaheim is safe to drink. About 70% is groundwater from the professionally managed Orange County basin, with the rest imported, and the supply meets EPA and California standards. PFAS-affected wells have dedicated treatment.
Water Source
Anaheim Public Utilities pumps roughly 70% of the city's water from the Orange County Groundwater Basin — managed by the Orange County Water District and replenished partly by the district's Groundwater Replenishment System, the world's largest potable-reuse purification project — with the remainder imported from the Metropolitan Water District.
EPA Compliance Status
Meets all federal Safe Drinking Water Act standards and California's stricter requirements. When PFAS was detected in parts of the basin, affected wells were taken offline and Anaheim built ion-exchange treatment plants to return them to service within standards.
Notable Contaminants & Context
- •PFAS compounds reached parts of the Orange County basin from decades of upstream Santa Ana River discharges; Anaheim was among the north-county cities that installed dedicated PFAS treatment on affected wells
- •Trace disinfection byproducts are monitored and compliant
- •Imported Colorado River water raises hardness in the blend
Water Quality Data
Key contaminants detected vs. regulatory limits. All values from the most recent published report — Source: City of Anaheim Public Utilities 2024 CCR.
| Contaminant | Detected | Limit | Status |
|---|---|---|---|
| Chlorine (total) | 1.4 mg/L | 4.0 mg/L | ✓ |
| Fluoride | 0.72 mg/L | 4.0 mg/L | ✓ |
| Lead (90th percentile) | 2.8 µg/L | 15.0 µg/L | ✓ |
| Nitrate (as N) | 2.4 mg/L | 10.0 mg/L | ✓ |
| TTHM (Total Trihalomethanes) | 28.6 µg/L | 80.0 µg/L | ✓ |
| HAA5 (Haloacetic Acids) | 19.3 µg/L | 60.0 µg/L | ✓ |
| Chromium-6 | 0.08 µg/L | 0.02 µg/L | ⚠ |
✓ = below limit ⚠ = above health goal ✗ = exceeds guideline
How It Compares
Orange County's basin management is considered among the best in the U.S. — the replenishment system purifies recycled water to near-distilled quality before recharge — and Anaheim's rapid PFAS treatment build-out became a template other California utilities followed.
Tips
- •Anaheim's annual report lists which wells have PFAS treatment online
- •Hardness varies with the groundwater/import blend
- •Filters are a taste preference, not a safety need
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality