Water Quality in South Dayton, NY: 4 Violations — Grade C
Grade C · Score 62/100 · 1 water system · Updated 2026-05-03
South Dayton'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
Water systems in South Dayton, NY have accumulated 4 EPA violations across the full compliance record — a dataset that captures reportable health-based exceedances, monitoring lapses, and enforcement actions filed with the federal Safe Drinking Water Information System.
Water Quality by ZIP Code in South Dayton
Water quality varies across South Dayton's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 14138 | C | 62 | 4 | 2 | View report → |
Violation Trend
EPA violations recorded for water systems serving South Dayton.
Water Quality Overview
South Dayton, New York receives a water quality grade of C with an overall score of 62 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving South Dayton have accumulated 4 EPA violations, including 2 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 661 people.
What Grade C Means
A grade of C indicates moderate compliance issues. South Dayton'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 South Dayton water systems is 0.0023 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 82% of homes built before 1986, South Dayton 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
South Dayton 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 South Dayton
South Dayton is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 661 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 South Dayton. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in South Dayton
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 South Dayton Water Systems
The following contaminants have been detected or caused violations across South Dayton's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Nitrate | Inorganic | 10 mg/L | 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 South Dayton:
| 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 South Dayton. Recent actions:
| Date | Action Type |
|---|---|
| 2025-01-15 | State Filed Judgment |
| 2025-01-15 | State Informal Enforcement |
| 2024-05-02 | State Informal Action |
| 2024-05-02 | State Order Extension |
| 2024-04-18 | State Filed Judgment |
| 2024-04-18 | State Informal Enforcement |
| 2024-03-01 | State Informal Action |
| 2024-02-29 | State Informal Enforcement |
| 2023-11-22 | State Informal Action |
| 2023-11-20 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-01-15.
South Dayton vs. Nearby New York Cities
How South Dayton's water quality compares to similar cities in New York:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| South Dayton | C | 4 | 1 | 661 |
| Dayton | D | 0 | 1 | 661 |
| Haverstraw | A | 1 | 5 | 660 |
| Keene Valley | C | 0 | 1 | 660 |
Common Questions About South Dayton Water
These are the most common questions residents search for about water quality in South Dayton, New York:
Is South Dayton water hard or soft? Water hardness varies by source. South Dayton's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink South Dayton tap water? South Dayton's water receives a grade of C (62/100). There are 2 health-based violations — consider filtration.
What is the best water filter for South Dayton? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
South Dayton vs. New York Average
Understanding how South Dayton 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 South Dayton.
ZIP Codes in South Dayton
South Dayton spans 1 ZIP code. The ZIP with the lowest water quality score is 14138. 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.