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WaterSafeCheck

Alpine, CA Tap Water Quality

Water safety reports for all 2 ZIP codes in Alpine, California

Average Score

68/100

Health Violations

12

ZIP Codes

2

High Lead Risk

0

of 2 ZIP codes

C

About Tap Water in Alpine, CA

Water quality in Alpine, CA is currently rated with a moderate C grade (average score: 68/100 across 2 ZIP codes). This rating indicates that while the water provided by Willowside Terrace Water Association is treated and regulated, there have been notable compliance issues or contaminant detections recently. Residents should stay informed about the specific challenges affecting their local supply.

The accumulation of 12 health-based violations over the past 5 years highlights systemic challenges within Alpine'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.

Fortunately, the modeled risk for widespread lead exposure in Alpine's municipal water is relatively low compared to national averages. However, because lead typically enters drinking water through the corrosion of older, individual home plumbing rather than the main supply lines, residents in homes built before 1986 should still exercise caution by running the tap before use.

Health-Based Contaminant Violations in Alpine

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

Combined RadiumStage 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 — Alpine, CA

Click any ZIP code for the full water quality report

C
91903

Alpine, CA

Score: 69/1006 violations
C
91901

Alpine, CA

Score: 66/1006 violations

Frequently Asked Questions — Alpine Water Quality

Is tap water safe to drink in Alpine, CA?+
Tap water in Alpine has a grade of C, indicating compliance concerns in recent years. Families with young children or pregnant women should consider using a certified NSF/ANSI 53 water filter for drinking and cooking.
What is the water quality score for Alpine?+
The average water quality score across 2 ZIP codes in Alpine, CA is 68/100. 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 Alpine have lead in its tap water?+
Lead risk ratings in Alpine are relatively low based on EPA monitoring data. However, lead in home plumbing is a separate concern — if your home was built before 1986, individual tap testing is recommended.
How do I get the water quality report for Alpine?+
Each ZIP code in Alpine 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 Alpine's tap water come from?+
Tap water in Alpine, 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.

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