Water Quality in Tappan, NY: No Violations - Grade D
Grade D · Score 40/100 · 2 water systems · Updated 2026-07-18
Tappan's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-07-18
Across all available EPA tracking data for Tappan, NY, the record has remained clean - 2 public water systems on file, zero violations recorded, and no enforcement proceedings initiated at any point in the federal dataset.
Water Quality by ZIP Code in Tappan
Tappan is covered by a single ZIP code, so one water-quality profile applies citywide. See the contaminant data below.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 10983 | D | 40 | 0 | 0 | View report → |
Violation Trend
EPA violations recorded for water systems serving Tappan.
Water Quality Overview
Tappan, New York receives a water quality grade of D with an overall score of 40 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
No EPA violations have been recorded for the 2 water systems serving Tappan. This is a positive indicator, though it does not guarantee the absence of all contaminants - some substances (like PFAS) are not yet fully regulated.
What Grade D Means
A grade of D indicates significant compliance issues. Tappan'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
Lead testing data for Tappan is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
With 87% of homes built before 1986, Tappan 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
Tappan 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 Tappan
Tappan is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 5,489 people across 1 ZIP code.
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 Tappan. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Tappan
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
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Tappan:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
| 2025 | 4 | 4 |
Violations have increased from 1 in 2022 to 4 in 2025. This trend warrants monitoring.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Tappan. Recent actions:
| Date | Action Type |
|---|---|
| 2025-10-07 | State Informal Action |
| 2025-09-18 | State Filed Judgment |
| 2025-09-18 | State Informal Enforcement |
| 2025-07-10 | State Order Extension |
| 2025-07-08 | State Informal Action |
| 2025-06-17 | State Filed Judgment |
| 2025-06-17 | State Informal Enforcement |
| 2025-04-21 | State Informal Action |
| 2025-03-28 | State Filed Judgment |
| 2025-03-28 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-10-07.
Tappan vs. Nearby New York Cities
How Tappan's water quality compares to similar cities in New York:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Tappan | D | 0 | 2 | 5,489 |
| East Moriches | C | 0 | 2 | 5,508 |
| Thornwood | D | 0 | 3 | 5,512 |
| Moravia | C | 5 | 3 | 5,514 |
Common Questions About Tappan Water
These are the most common questions residents search for about water quality in Tappan, New York:
Is Tappan water hard or soft? Water hardness varies by source. Tappan's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Tappan tap water? Tappan's water receives a grade of D (40/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Tappan? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Tappan vs. New York Average
Understanding how Tappan 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 Tappan.
ZIP Codes in Tappan
Tappan spans 1 ZIP code. 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.