A
100

Excellent Water Quality

Grover Beach, CA 93433

San Luis Obispo County · Population served: 12,701 · Data updated March 2026

Water Systems Serving This Area

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CITY OF GROVER BEACH PUBLIC WORKS DEPT
Surface water · Pop. 12,701
PWSID: CA4010004

Water Quality Summary

Understanding Your Water in Grover Beach

Tap water quality in Grover Beach, California (93433) receives an overall grade of A (Excellent) with a score of 100 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 19 points above the California state average of 81. Compared to the national average (75), this area performs significantly better. The area is served by City Of Grover Beach Public Works Dept, a surface water system providing water to approximately 12,701 people. The area has a clean violation record over the past 5 years — a positive indicator of consistent water quality management.

Your Score 100/100 A
vs State 19 pts above California avg (81)
vs National 25 pts above national avg (75)

What a Grade A Means

A score of 100/100 means the water supply in Grover Beach, CA meets or exceeds all EPA standards with minimal issues. Contaminant levels are well within safe limits, and the water system has maintained a strong compliance record. While no water supply is guaranteed perfect at the tap due to household plumbing, this is among the best-scoring areas in the country.

Surface water: sourced from rivers, lakes, or reservoirs

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Grover Beach, California receives a grade of A (Excellent) with a score of 100/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 93433 is served by 1 water system using surface water sources, providing water to approximately 12,701 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.

No lead data is currently available for ZIP code 93433. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.

No PFAS ("forever chemicals") were detected in water systems serving Grover Beach, California during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Grover Beach, California have zero violations in the last 5 years. This is a positive indicator of consistent regulatory compliance and water quality management.

Water in Grover Beach, California shows no major contaminant concerns based on available data. A basic carbon filter can improve taste and reduce chlorine. For extra peace of mind, an NSF-certified pitcher filter or faucet-mount filter provides an affordable layer of protection.

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