Delaware County, New York
37 ZIP codes · Avg score 51/100 · Grade D · Updated 2026-06-03
For households across Delaware County's 37 ZIP codes, below-average water safety data and recurring health violations make local monitoring worthwhile — checking the specific system serving an address is the most actionable starting point.
How Delaware County Compares
How Delaware County Compares
Delaware County scores 10 points below the New York state average (61/100) and 17 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Delaware County, New York
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.9 (asthma 10.9%, diabetes 12.3%)
Estimated additional annual cost per homeowner: $1,851, driven primarily by flood
Infrastructure: 0.49% avg pipe failure probability, 89% of ZIPs at high risk
75.2% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
↑ Worsening trendEPA violation counts by year across Delaware County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 20 violations. Past 5 years: 38 total (38 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,851
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
30,992 housing units in Delaware County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Delaware County
Remediation costs are relatively manageable for most homeowners in Delaware County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Delaware County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Delaware County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | LEISURE VILLAGE | 56 | 69 |
| 2 | Delhi Village | 3,833 | 69 |
| 3 | Delhi Rehab | 144 | 69 |
| 4 | Delhi Mhp Llc | 61 | 69 |
| 5 | Treadwell Water District | 164 | 63 |
37 total water systems serve Delaware County.
All ZIP Codes in Delaware County
37 ZIP codes tracked in Delaware County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 13739 | Bloomville | 66 | C | 0 | $170K |
| 2 | 13731 | Andes | 61 | C | 6 | $270K |
| 3 | 13774 | Fishs Eddy | 61 | C | 12 | $132K |
| 4 | 13788 | Hobart | 61 | C | 12 | $222K |
| 5 | 13740 | Bovina Center | 60 | C | 7 | $351K |
| 6 | 13754 | Deposit | 60 | C | 0 | $126K |
| 7 | 13750 | Davenport | 56 | C | 37 | $169K |
| 8 | 13751 | Davenport Center | 56 | C | 13 | $213K |
| 9 | 13755 | Downsville | 56 | C | 29 (1 health) | $167K |
| 10 | 13775 | Franklin | 56 | C | 32 | $179K |
| 11 | 13846 | Treadwell | 56 | C | 31 | $215K |
| 12 | 12421 | Denver | 53 | D | 0 | $318K |
| 13 | 12438 | Halcottsville | 53 | D | 0 | — |
| 14 | 12459 | New Kingston | 53 | D | 0 | $208K |
| 15 | 13747 | Colliersville | 53 | D | 0 | — |
| 16 | 13752 | Delancey | 53 | D | 0 | $238K |
| 17 | 13757 | East Meredith | 53 | D | 0 | $210K |
| 18 | 13804 | Masonville | 53 | D | 0 | $130K |
| 19 | 13806 | Meridale | 53 | D | 0 | $188K |
| 20 | 13839 | Sidney Center | 53 | D | 0 | $109K |
| 21 | 13842 | South Kortright | 53 | D | 0 | $218K |
| 22 | 13860 | West Davenport | 53 | D | 0 | — |
| 23 | 12474 | Roxbury | 51 | D | 13 | $213K |
| 24 | 13753 | Delhi | 51 | D | 69 (1 health) | $213K |
| 25 | 13782 | Hamden | 51 | D | 14 | $238K |
| 26 | 12455 | Margaretville | 46 | D | 29 | $220K |
| 27 | 13783 | Hancock | 46 | D | 33 | $153K |
| 28 | 13856 | Walton | 46 | D | 15 | $144K |
| 29 | 10920 | Congers | 45 | D | 0 | $534K |
| 30 | 12406 | Arkville | 45 | D | 0 | $260K |
| 31 | 12465 | Pine Hill | 45 | D | 0 | $335K |
| 32 | 12430 | Fleischmanns | 41 | D | 7 (6 health) | $278K |
| 33 | 13838 | Sidney | 41 | D | 31 | $118K |
| 34 | 12434 | Grand Gorge | 40 | D | 0 | $168K |
| 35 | 12441 | Highmount | 40 | D | 0 | $283K |
| 36 | 13756 | East Branch | 40 | D | 0 | $149K |
| 37 | 13847 | Trout Creek | 40 | D | 0 | — |
Recommended Buyer Guides for Delaware County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 75.2% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Delaware County, New York
Overview
Delaware County in New York covers 37 ZIP codes with an average Home Safety Score of D (51/100).
17 of 37 ZIP codes have recorded EPA violations. 8 health-based violations have been documented.
← Back to New York water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Delaware County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
75.2% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.