Water Quality in San Simeon, CA: 2 Violations — Grade D
Grade D · Score 48/100 · 2 water systems · Updated 2026-05-03
San Simeon's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
The compliance record maintained by the EPA for San Simeon, CA documents 2 water violations — each tied to a specific public water system and assigned a violation category in the federal Safe Drinking Water dataset.
Water Quality by ZIP Code in San Simeon
Water quality varies across San Simeon's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 93452 | D | 48 | 2 | 2 | View report → |
Violation Trend
EPA violations recorded for water systems serving San Simeon.
Water Quality Overview
San Simeon, California receives a water quality grade of D with an overall score of 48 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 2 water systems serving San Simeon have accumulated 2 EPA violations, including 2 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 601 people.
What Grade D Means
A grade of D indicates significant compliance issues. San Simeon'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 San Simeon water systems is 0.0450 mg/L — this exceeds the EPA action level of 0.015 mg/L. 1 ZIP code exceed the EPA lead action level.
With 59% of homes built before 1986, San Simeon 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
San Simeon is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving San Simeon
San Simeon is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 601 people across 1 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 4 enforcement actions against water systems serving San Simeon. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in San Simeon
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 San Simeon Water Systems
The following contaminants have been detected or caused violations across San Simeon's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| E. coli | Microbiological | N/A | 2 | 1 | Yes |
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 San Simeon:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
Violation counts have remained stable over the observed period.
EPA Enforcement History
The EPA and state regulators have taken 4 enforcement actions against water systems serving San Simeon. Recent actions:
| Date | Action Type |
|---|---|
| 2024-11-04 | State Order Extension |
| 2024-04-11 | State Filed Suit |
| 2024-01-25 | State Order Extension |
| 2023-07-05 | State Filed Suit |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2024-11-04.
San Simeon vs. Nearby California Cities
How San Simeon's water quality compares to similar cities in California:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| San Simeon | D | 2 | 2 | 601 |
| Cedarville | A | 0 | 1 | 600 |
| Eagleville | C | 0 | 1 | 600 |
| Fort Bidwell | C | 0 | 1 | 600 |
Common Questions About San Simeon Water
These are the most common questions residents search for about water quality in San Simeon, California:
Is San Simeon water hard or soft? Water hardness varies by source. San Simeon's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink San Simeon tap water? San Simeon's water receives a grade of D (48/100). There are 2 health-based violations — consider filtration.
What is the best water filter for San Simeon? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
San Simeon vs. California Average
Understanding how San Simeon 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 San Simeon.
ZIP Codes in San Simeon
San Simeon spans 1 ZIP code. The ZIP with the lowest water quality score is 93452. 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.