Water Quality in Oakland, CA: No Violations - Grade N/A

Data: EPA Safe Drinking Water Information System (SDWIS)

Water Quality Overview

Oakland, California has directly mapped EPA water-system data for 14 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.

The available EPA records report no violations across 14 directly mapped ZIP records with reported counts for Oakland. This does not guarantee the absence of contaminants.

Lead Levels

The average 90th percentile lead level across Oakland water systems is 0.0000 mg/L - within EPA limits. No exceedances appear among the 14 ZIP records with known lead status.

With 82% of homes built before 1986, Oakland has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.

Water Systems Serving Oakland

Oakland is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 425,492 people across 26 ZIP codes.

Each water system is identified by a Public Water System ID (PWSID) and is required to:

• Test for over 90 regulated contaminants on a regular schedule
• Report results to the EPA and state regulators
• Issue an annual Consumer Confidence Report (CCR) to all customers
• Take corrective action when violations occur

How to Check Your Water in Oakland

1. Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history

2. Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants

3. Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel

4. Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics

5. Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts

Oakland vs. Nearby California Cities

How Oakland's water quality compares to similar cities in California:

Recommended Water Filters for Oakland

Based on contaminants detected in Oakland's water supply, these filter types are recommended:

Reverse Osmosis (under-sink)

• Removes: Lead
• Effectiveness: 95-99%
• Cost range: $150–$500
• Certification: NSF/ANSI 58
• Recommended products:
  • Waterdrop G3P800
  • Aquasana AQ-5200
  • Clearly Filtered Pitcher

Granular Activated Carbon (GAC, whole-house or under-sink)

• Removes: Chloramine as chlorine
• Effectiveness: 95-99%
• Cost range: $100–$600
• Certification: NSF/ANSI 42
• Recommended products:
  • Aquasana AQ-5200
  • Waterdrop Chubby Pitcher
  • Berkey Travel

Granular Activated Carbon (GAC, under-sink or whole-house)

• Removes: Haloacetic acids, 5 species
• Effectiveness: 60-80%
• Cost range: $100–$600
• Certification: NSF/ANSI 53
• Recommended products:
  • Aquasana AQ-5200
  • Aquasana EQ-1000 Rhino

Water Quality by ZIP Code in Oakland

EPA coverage and recorded violations can differ across Oakland's ZIP codes. Missing counts are shown as unavailable, not zero:

Common Questions About Oakland Water

These are the most common questions residents search for about water quality in Oakland, California:

Is Oakland water hard or soft? Water hardness varies by source. Oakland's 1 water system uses a single source. Check your ZIP code report for specific hardness data.

Can I drink Oakland tap water? City-level EPA records cannot determine safety at a specific tap. No health-based violations are recorded across 14 directly mapped ZIP records with known counts, but this is not a property-level safety guarantee.

What is the best water filter for Oakland? Based on detected contaminants, a reverse osmosis (under-sink) filter is most recommended. See our Water Filter Matcher for personalized recommendations.

Oakland vs. California Average

Understanding how Oakland compares to the broader California average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.

To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within Oakland.

ZIP Codes in Oakland

Oakland spans 26 ZIP codes. EPA water-system coverage is available for 14 directly mapped ZIP codes. Check each ZIP code for detailed contaminant data, violation history, and system information.

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Lead/copper: EPA Lead and Copper Rule sampling data
• Radon: EPA Map of Radon Zones
• Enforcement: EPA ECHO database
• Filter recommendations: NSF/ANSI certified products

Source reporting periods vary. See each cited source for its publication schedule.