Water Quality in Green Valley Lake, CA: 2 Violations — Grade D
Grade D · Score 54/100 · 1 water system · Updated 2026-05-03
Green Valley Lake's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Compliance records maintained by the EPA for Green Valley Lake, CA log 2 violations — accumulated reportable events drawn from every local utility in the SDWIS national tracking system.
Water Quality by ZIP Code in Green Valley Lake
Water quality varies across Green Valley Lake's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 92341 | D | 54 | 2 | 1 | View report → |
Water Quality Overview
Green Valley Lake, 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 1 water system serving Green Valley Lake have accumulated 2 EPA violations, including 1 health-based violation. These violations are tracked across 1 ZIP codes serving approximately 2,993 people.
What Grade D Means
A grade of D indicates significant compliance issues. Green Valley Lake'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 Green Valley Lake water systems is 0.0249 mg/L — this exceeds the EPA action level of 0.015 mg/L. 1 ZIP code exceed the EPA lead action level.
With 85% of homes built before 1986, Green Valley Lake 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
Green Valley Lake is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Green Valley Lake
Green Valley Lake is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 2,993 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 3 enforcement actions against water systems serving Green Valley Lake. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Green Valley Lake
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 Green Valley Lake Water Systems
The following contaminants have been detected or caused violations across Green Valley Lake's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Total Coliform | Microbiological | N/A | 1 | 1 | No |
| Combined Radium | Radionuclides | 5 pCi/L | 1 | 1 | Yes |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 3 enforcement actions against water systems serving Green Valley Lake. Recent actions:
| Date | Action Type |
|---|---|
| 2024-12-11 | State Filed Suit |
| 2023-03-01 | State Order Extension |
| 2023-02-08 | State Filed Suit |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2024-12-11.
Green Valley Lake vs. Nearby California Cities
How Green Valley Lake's water quality compares to similar cities in California:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Green Valley Lake | D | 2 | 1 | 2,993 |
| Talmage | B | 7 | 3 | 3,029 |
| Kaweah | D | 0 | 1 | 2,950 |
| Sequoia National Park | D | 0 | 1 | 2,950 |
Common Questions About Green Valley Lake Water
These are the most common questions residents search for about water quality in Green Valley Lake, California:
Is Green Valley Lake water hard or soft? Water hardness varies by source. Green Valley Lake's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Green Valley Lake tap water? Green Valley Lake's water receives a grade of D (54/100). There are 1 health-based violations — consider filtration.
What is the best water filter for Green Valley Lake? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Green Valley Lake vs. California Average
Understanding how Green Valley Lake 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 Green Valley Lake.
ZIP Codes in Green Valley Lake
Green Valley Lake spans 1 ZIP code. The ZIP with the lowest water quality score is 92341. 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.