Skip to main content
WaterSafeCheck

Petaluma, CA Tap Water Quality

Water safety reports for all 6 ZIP codes in Petaluma, California

Average Score

89/100

Health Violations

6

ZIP Codes

6

High Lead Risk

1

of 6 ZIP codes

A

About Tap Water in Petaluma, CA

Tap water in Petaluma, CA ranks among the best in the state, maintaining a remarkable average water quality score of 89/100 across its 6 ZIP codes. Based on recent EPA Safe Drinking Water Act compliance records, water provided by City of Petaluma, and other municipal suppliers has consistently met or exceeded federal safety standards. This top-tier "A" grade reflects strong infrastructure, diligent monitoring by California State Water Resources Control Board, and low contaminant levels.

The accumulation of 6 health-based violations over the past 5 years highlights systemic challenges within Petaluma's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by California State Water Resources Control Board. The city relies on ground water, which may require significant treatment upgrades to address these recurring issues.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 1 out of 6 ZIP codes in Petaluma are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.

⚠ Lead Risk Alert: Some ZIP codes in Petaluma are rated High or Very High for lead exposure risk based on EPA data. Search your specific ZIP code for a detailed lead level report.

Health-Based Contaminant Violations in Petaluma

EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Petaluma water systems over the past 5 years.

Stage 2 DBP Rule

Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.

Water Quality by ZIP Code — Petaluma, CA

Click any ZIP code for the full water quality report

A
94955

Petaluma, CA

Score: 94/1001 violation
A
94975

Petaluma, CA

Score: 94/1001 violation
A
94999

Petaluma, CA

Score: 94/1001 violation
A
94953

Petaluma, CA

Score: 91/1001 violation
A
94954

Petaluma, CA

Score: 86/1001 violation
B
94952

Petaluma, CA

Score: 76/1001 violation

Frequently Asked Questions — Petaluma Water Quality

Is tap water safe to drink in Petaluma, CA?+
Yes — tap water in Petaluma meets all federal EPA standards and earns a A grade. It is generally safe for healthy adults. As always, running your tap for 30 seconds before use and using a filter adds extra protection for vulnerable populations.
What is the water quality score for Petaluma?+
The average water quality score across 6 ZIP codes in Petaluma, CA is 89/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Petaluma have lead in its tap water?+
1 out of 6 ZIP codes in Petaluma are rated High or Very High for lead exposure risk. Older homes built before 1986 may have lead service lines or plumbing fixtures. Residents should run their tap for 30 seconds before use and consider a certified NSF/ANSI 53 lead filter.
How do I get the water quality report for Petaluma?+
Each ZIP code in Petaluma has a full water quality report on this site — click any ZIP code below. You can also get the annual Consumer Confidence Report (CCR) from your local water utility. The CCR is required to be published every year by July 1 and contains actual contaminant measurements and violation history.
Where does Petaluma's tap water come from?+
Tap water in Petaluma, CA primarily comes from ground water. Groundwater systems pump water from underground aquifers, which is naturally filtered through soil and rock but can still contain naturally occurring contaminants.

Looking for water quality in other cities in California?

View All Cities in California →