Herkimer County, New York
20 ZIP codes · Avg score 74/100 · Grade B · Updated 2026-06-03
EPA monitoring reports for Herkimer County cover 20 ZIP codes and tell a largely reassuring story — compliance rates are high and health-based violations are far below the national norm.
How Herkimer County Compares
How Herkimer County Compares
Herkimer County scores 13 points above the New York state average (61/100) and 6 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Herkimer 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 11.1%, diabetes 11.2%)
Estimated additional annual cost per homeowner: $1,768, driven primarily by flood
Infrastructure: 0.536% avg pipe failure probability, 85% of ZIPs at high risk
79.2% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Herkimer County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 17 violations. Past 5 years: 58 total (58 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: $1,768
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
32,733 housing units in Herkimer 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 Herkimer County
Remediation costs are relatively manageable for most homeowners in Herkimer 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 Herkimer 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 Herkimer County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Herkimer Village | 7,606 | 24 |
| 2 | Mohawk (v) Water Works | 2,985 | 23 |
| 3 | East Herkimer Water District | 1,024 | 18 |
| 4 | Herkimer Water District #3 (highland-steuben) | 192 | 18 |
| 5 | Dolgeville (v) Public Water System | 2,166 | 16 |
34 total water systems serve Herkimer County.
All ZIP Codes in Herkimer County
20 ZIP codes tracked in Herkimer County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 13406 | Middleville | 89 | A | 4 (1 health) | $139K |
| 2 | 13416 | Newport | 89 | A | 2 | $160K |
| 3 | 13475 | Van Hornesville | 89 | A | 16 (1 health) | $146K |
| 4 | 13420 | Old Forge | 87 | A | 10 | $349K |
| 5 | 13431 | Poland | 87 | A | 4 | $208K |
| 6 | 13407 | Mohawk | 86 | A | 5 | $134K |
| 7 | 13329 | Dolgeville | 82 | B | 16 (3 health) | $121K |
| 8 | 13340 | Frankfort | 80 | B | 6 | $144K |
| 9 | 13491 | West Winfield | 80 | B | 13 | $144K |
| 10 | 13365 | Little Falls | 74 | B | 6 | $121K |
| 11 | 13333 | East Springfield | 73 | B | 0 | $175K |
| 12 | 13470 | Stratford | 73 | B | 0 | $147K |
| 13 | 13454 | Salisbury Center | 66 | C | 0 | — |
| 14 | 13468 | Springfield Center | 66 | C | 0 | — |
| 15 | 13472 | Thendara | 66 | C | 0 | $369K |
| 16 | 13319 | Chadwicks | 65 | C | 0 | — |
| 17 | 13452 | Saint Johnsville | 65 | C | 0 | $107K |
| 18 | 13495 | Yorkville | 65 | C | 0 | $148K |
| 19 | 13357 | Ilion | 56 | C | 2 (1 health) | $105K |
| 20 | 13350 | Herkimer | 40 | D | 18 (17 health) | $136K |
Recommended Buyer Guides for Herkimer County
Below: editorial picks, no sponsored placements.
- Best Water Filters for Lead — Lead above EPA action level in 2 ZIP codes
- Best Lead Paint Test Kits — 79.2% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Herkimer County, New York
Overview
Herkimer County in New York covers 20 ZIP codes with an average Home Safety Score of B (74/100).
12 of 20 ZIP codes have recorded EPA violations. 23 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.