Riverside, California Water Quality Report
Comprehensive water safety analysis • Updated February 2026
Riverside's water meets EPA standards, though 0 contaminant(s) are elevated above 50% of limits.
•All 1 historical violation(s) in Riverside have been resolved.
Water Safety Overview
Generally Safe. Riverside's tap water meets EPA standards. Score: 82/100.
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All Detected Contaminants
9 contaminants tested • EPA SDWIS data
| Contaminant | Level Detected | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
Lead | 0.0056 mg/L | 0.015 mg/L | 37.5% | Safe |
Total Trihalomethanes | 29.60 ug/L | 80.00 ug/L | 37.0% | Safe |
Copper | 0.358 mg/L | 1.30 mg/L | 27.6% | Safe |
Chromium | 0.024 mg/L | 0.100 mg/L | 24.2% | Safe |
Mercury | 0.0003 mg/L | 0.0020 mg/L | 16.7% | Safe |
Fluoride | 0.609 mg/L | 4.00 mg/L | 15.2% | Safe |
Nitrite | 0.119 mg/L | 1.00 mg/L | 11.9% | Safe |
Arsenic | 0.0010 mg/L | 0.010 mg/L | 10.4% | Safe |
Nitrate | 0.447 mg/L | 10.00 mg/L | 4.5% | Safe |
Recommended Water Filters for Riverside
Based on detected contaminants
Reverse Osmosis System
Best for Riverside. Removes 95-99% of contaminants including heavy metals, PFAS, and nitrates.
- ✓ Removes lead
- ✓ Removes arsenic
- ✓ Removes nitrates
- ✓ Removes total dissolved solids
Activated Carbon Filter
Good for Riverside. Removes chlorine, improves taste, and filters many organic compounds.
- ✓ Removes chlorine and chloramine
- ✓ Improves taste and odor
- ✓ Filters pesticides and VOCs
NSF 53 Lead Certification Required
Lead detected in Riverside. Ensure any filter is NSF/ANSI 53 certified for lead removal.
EPA Compliance History
Past violations for Riverside's water system
other
Lead - 2/4/2021
ResolvedWater System Information
RIVERSIDE WATER SYSTEM
- PWS ID:
- CA139189
- Population Served:
- 319,997
- Water Source:
- surface
Riverside Water Quality Score
Based on EPA contaminant data and compliance records
Positive Findings
- Good overall water quality
- Most contaminants within safe limits
Protect Your Family's Water
Even with good water quality, many families choose to filter their water for extra peace of mind.
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