Water Quality in Greenwood Lake, NY: 6 Violations — Grade C
Grade C · Score 57/100 · 1 water system · Updated 2026-05-03
Greenwood Lake's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Federal EPA data for Greenwood Lake, NY shows 6 water compliance events in the record — the table below identifies system names and violation types.
Water Quality by ZIP Code in Greenwood Lake
Water quality varies across Greenwood Lake's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 10925 | C | 57 | 6 | 3 | View report → |
Violation Trend
EPA violations recorded for water systems serving Greenwood Lake.
Water Quality Overview
Greenwood Lake, New York receives a water quality grade of C with an overall score of 57 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving Greenwood Lake have accumulated 6 EPA violations, including 3 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 3,383 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Greenwood Lake's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Greenwood Lake water systems is 0.0025 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 89% of homes built before 1986, Greenwood 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
Greenwood Lake is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Greenwood Lake
Greenwood Lake is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 3,383 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 10 enforcement actions against water systems serving Greenwood Lake. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Greenwood 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 Greenwood Lake Water Systems
The following contaminants have been detected or caused violations across Greenwood Lake's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 2 | 1 | Yes |
| Stage 1 DBP Rule | Treatment Technique | N/A | 1 | 1 | 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 Greenwood Lake:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2022 | 2 | 2 |
| 2023 | 2 | 2 |
Violation counts have remained stable over the observed period.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Greenwood Lake. Recent actions:
| Date | Action Type |
|---|---|
| 2025-03-27 | State Informal Action |
| 2024-12-11 | State Order Extension |
| 2024-06-28 | State Filed Judgment |
| 2024-06-28 | State Informal Enforcement |
| 2024-02-23 | State Informal Action |
| 2024-01-31 | State Order Extension |
| 2024-01-22 | State Filed Judgment |
| 2024-01-22 | State Informal Enforcement |
| 2022-03-25 | State Filed Judgment |
| 2022-03-25 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-03-27.
Greenwood Lake vs. Nearby New York Cities
How Greenwood Lake's water quality compares to similar cities in New York:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Greenwood Lake | C | 6 | 1 | 3,383 |
| Sterling Forest | D | 0 | 1 | 3,383 |
| Sandy Creek | B | 9 | 4 | 3,392 |
| Corinth | B | 1 | 5 | 3,405 |
Common Questions About Greenwood Lake Water
These are the most common questions residents search for about water quality in Greenwood Lake, New York:
Is Greenwood Lake water hard or soft? Water hardness varies by source. Greenwood Lake's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Greenwood Lake tap water? Greenwood Lake's water receives a grade of C (57/100). There are 3 health-based violations — consider filtration.
What is the best water filter for Greenwood Lake? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Greenwood Lake vs. New York Average
Understanding how Greenwood Lake compares to the broader New York 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 Greenwood Lake.
ZIP Codes in Greenwood Lake
Greenwood Lake spans 1 ZIP code. The ZIP with the lowest water quality score is 10925. 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.