Water Quality in Grover Beach, CA: 44 Violations — Grade D
Grade D · Score 54/100 · 3 water systems · Updated 2026-05-03
Grover Beach's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Grover Beach in CA has 44 EPA water violations documented — the compliance history below covers what was flagged and which local systems are associated with each finding.
Water Quality by ZIP Code in Grover Beach
Water quality varies across Grover Beach's 2 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 93483 | D | 50 | 22 | 19 | View report → |
| 93433 | C | 58 | 22 | 19 | View report → |
Violation Trend
EPA violations recorded for water systems serving Grover Beach.
Water Quality Overview
Grover Beach, California receives a water quality grade of D with an overall score of 54 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 3 water systems serving Grover Beach have accumulated 44 EPA violations, including 38 health-based violations. These violations are tracked across 2 ZIP codes serving approximately 12,841 people.
What Grade D Means
A grade of D indicates significant compliance issues. Grover Beach's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
The average 90th percentile lead level across Grover Beach water systems is 0.0006 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 71% of homes built before 1986, Grover Beach 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.
Radon Risk
Grover Beach is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Grover Beach
Grover Beach is served by 3 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 12,841 people across 2 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
The EPA has taken 16 enforcement actions against water systems serving Grover Beach. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Grover Beach
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
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
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Grover Beach Water Systems
The following contaminants have been detected or caused violations across Grover Beach's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Barium | Inorganic | 2 mg/L | 38 | 2 | Yes |
| Lead | Inorganic | 0.015 mg/L | 4 | 2 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 2 | 2 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Grover Beach:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2022 | 8 | 8 |
| 2023 | 8 | 8 |
| 2024 | 10 | 10 |
| 2025 | 4 | 4 |
Violations have decreased from 8 in 2022 to 4 in 2025, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 7 enforcement actions against water systems serving Grover Beach. Recent actions:
| Date | Action Type |
|---|---|
| 2025-07-10 | State Order Extension |
| 2024-03-26 | State Order Extension |
| 2024-03-18 | State Order Extension |
| 2024-01-29 | State Filed Suit |
| 2024-01-25 | State Filed Suit |
| 2022-09-07 | State Order Extension |
| 2021-12-15 | State Filed Suit |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-07-10.
Grover Beach vs. Nearby California Cities
How Grover Beach's water quality compares to similar cities in California:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Grover Beach | D | 44 | 3 | 12,841 |
| Scotts Valley | B | 8 | 5 | 12,799 |
| Big Bear City | B | 0 | 1 | 12,738 |
| Sugarloaf | C | 0 | 1 | 12,738 |
Common Questions About Grover Beach Water
These are the most common questions residents search for about water quality in Grover Beach, California:
Is Grover Beach water hard or soft? Water hardness varies by source. Grover Beach's 3 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Grover Beach tap water? Grover Beach's water receives a grade of D (54/100). There are 38 health-based violations — consider filtration.
What is the best water filter for Grover Beach? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Grover Beach vs. California Average
Understanding how Grover Beach 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 Grover Beach.
ZIP Codes in Grover Beach
Grover Beach spans 2 ZIP codes. The ZIP with the lowest water quality score is 93433. Each ZIP code has its own water quality profile based on the specific water system serving that area. 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
Updated daily.