Oswego County, New York
24 ZIP codes · Avg score 68/100 · Grade C · Updated 2026-06-03
Although much of Oswego County meets baseline standards, some of its 24 ZIP codes show violations that merit closer attention.
How Oswego County Compares
How Oswego County Compares
Oswego County scores 7 points above the New York state average (61/100) and 0 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Oswego 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: 13.6 (asthma 11.3%, diabetes 11.2%)
Estimated additional annual cost per homeowner: $1,062, driven primarily by energy_code_gap
Infrastructure: 0.445% avg pipe failure probability, 70% of ZIPs at high risk
65.6% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Oswego County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 2 violations. Past 5 years: 4 total (4 health-based).
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: $1,062
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
39,757 housing units in Oswego 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 Oswego County
Remediation costs are relatively manageable for most homeowners in Oswego 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 Oswego 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 Oswego County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | OCWA | 350,000 | 50 |
| 2 | Country Haven Mobile Home Park | 300 | 28 |
| 3 | WOODLAND MOBILE HOME HAVEN | 120 | 20 |
| 4 | Fulton City | 16,600 | 14 |
| 5 | Green Acres Mhp | 139 | 14 |
34 total water systems serve Oswego County.
All ZIP Codes in Oswego County
24 ZIP codes tracked in Oswego County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 13144 | Richland | 83 | B | 0 | $101K |
| 2 | 13661 | Mannsville | 83 | B | 0 | $173K |
| 3 | 13131 | Parish | 80 | B | 6 | $134K |
| 4 | 13426 | Orwell | 80 | B | 7 | — |
| 5 | 13135 | Phoenix | 79 | B | 6 (1 health) | $167K |
| 6 | 13044 | Constantia | 77 | B | 12 | $145K |
| 7 | 13069 | Fulton | 77 | B | 14 (1 health) | $113K |
| 8 | 13114 | Mexico | 76 | B | 4 | $153K |
| 9 | 13142 | Pulaski | 76 | B | 1 | $158K |
| 10 | 13167 | West Monroe | 76 | B | 4 | $164K |
| 11 | 13302 | Altmar | 76 | B | 8 | $124K |
| 12 | 13145 | Sandy Creek | 74 | B | 9 (1 health) | $139K |
| 13 | 13074 | Hannibal | 69 | C | 14 | $137K |
| 14 | 13132 | Pennellville | 67 | C | 6 | $190K |
| 15 | 13028 | Bernhards Bay | 63 | C | 0 | $149K |
| 16 | 13076 | Hastings | 63 | C | 0 | $175K |
| 17 | 13036 | Central Square | 55 | C | 0 | $174K |
| 18 | 13083 | Lacona | 53 | D | 0 | $135K |
| 19 | 13103 | Mallory | 53 | D | 0 | — |
| 20 | 13121 | New Haven | 53 | D | 0 | — |
| 21 | 13123 | North Bay | 53 | D | 0 | — |
| 22 | 13437 | Redfield | 53 | D | 0 | $90K |
| 23 | 13493 | Williamstown | 53 | D | 0 | $110K |
| 24 | 13064 | Fair Haven | 52 | D | 2 | — |
Recommended Buyer Guides for Oswego County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 65.6% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Oswego County, New York
Overview
Oswego County in New York covers 24 ZIP codes with an average Home Safety Score of C (68/100).
13 of 24 ZIP codes have recorded EPA violations. 3 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.