Montgomery County, Ohio
54 ZIP codes · Avg score 42/100 · Grade D · Updated 2026-06-03
Across Montgomery County's 54 ZIP codes, EPA data shows a below-average compliance pattern — health-based violations are documented in several areas, and independent testing is a reasonable step for concerned households.
How Montgomery County Compares
How Montgomery County Compares
Montgomery County scores 18 points below the Ohio state average (60/100) and 26 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Montgomery County, Ohio
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14 (asthma 11.5%, diabetes 14.5%)
Estimated additional annual cost per homeowner: $1,143, driven primarily by water_lead
Infrastructure: 0.406% avg pipe failure probability, 43% of ZIPs at high risk
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Montgomery County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 91 violations. Past 5 years: 93 total (93 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: $1,143
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Montgomery County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Montgomery 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 Montgomery County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | DAYTON PUBLIC WATER SYSTEM | 141,407 | 214 |
| 2 | Wright State University | 8,948 | 210 |
| 3 | Dayton Va Bldg 410 | 125 | 210 |
| 4 | Woodbury Apartments Public Water System | 120 | 210 |
| 5 | Dayton Va Bldg 320 Pod a | 95 | 210 |
25 total water systems serve Montgomery County.
All ZIP Codes in Montgomery County
54 ZIP codes tracked in Montgomery County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 45322 | Englewood | 70 | B | 1 | $166K |
| 2 | 45377 | Vandalia | 70 | B | 0 | $192K |
| 3 | 45325 | Farmersville | 68 | C | 1 | $212K |
| 4 | 45345 | New Lebanon | 68 | C | 2 | $139K |
| 5 | 45327 | Germantown | 65 | C | 0 | $198K |
| 6 | 45343 | Miamisburg | 65 | C | 8 (1 health) | — |
| 7 | 45309 | Brookville | 64 | C | 3 | $197K |
| 8 | 45342 | Miamisburg | 64 | C | 8 (1 health) | $207K |
| 9 | 45354 | Phillipsburg | 62 | C | 3 | $138K |
| 10 | 45315 | Clayton | 53 | D | 0 | $184K |
| 11 | 45402 | Dayton | 44 | D | 5 (1 health) | $106K |
| 12 | 45403 | Dayton | 44 | D | 5 (1 health) | $74K |
| 13 | 45405 | Dayton | 44 | D | 5 (1 health) | $74K |
| 14 | 45406 | Dayton | 44 | D | 5 (1 health) | $82K |
| 15 | 45409 | Dayton | 44 | D | 5 (1 health) | $231K |
| 16 | 45417 | Dayton | 44 | D | 5 (1 health) | $73K |
| 17 | 45428 | Dayton | 44 | D | 5 (1 health) | — |
| 18 | 45429 | Dayton | 44 | D | 5 (1 health) | $221K |
| 19 | 45458 | Dayton | 44 | D | 5 (1 health) | $338K |
| 20 | 45070 | West Elkton | 40 | D | 0 | $96K |
| 21 | 45861 | Melrose | 40 | D | 0 | $111K |
| 22 | 45414 | Dayton | 39 | F | 5 (1 health) | $163K |
| 23 | 45415 | Dayton | 39 | F | 5 (1 health) | $169K |
| 24 | 45420 | Dayton | 39 | F | 5 (1 health) | $116K |
| 25 | 45424 | Dayton | 39 | F | 5 (1 health) | $169K |
| 26 | 45426 | Dayton | 39 | F | 5 (1 health) | $112K |
| 27 | 45439 | Dayton | 39 | F | 5 (1 health) | $120K |
| 28 | 45440 | Dayton | 39 | F | 5 (1 health) | $248K |
| 29 | 45449 | Dayton | 39 | F | 5 (1 health) | $148K |
| 30 | 45459 | Dayton | 39 | F | 5 (1 health) | $276K |
| 31 | 45400 | Dayton | 32 | F | 5 (1 health) | — |
| 32 | 45401 | Dayton | 32 | F | 5 (1 health) | — |
| 33 | 45408 | Dayton | 32 | F | 5 (1 health) | — |
| 34 | 45410 | Dayton | 32 | F | 5 (1 health) | $98K |
| 35 | 45412 | Dayton | 32 | F | 5 (1 health) | — |
| 36 | 45413 | Dayton | 32 | F | 5 (1 health) | — |
| 37 | 45416 | Dayton | 32 | F | 5 (1 health) | $76K |
| 38 | 45418 | Dayton | 32 | F | 5 (1 health) | — |
| 39 | 45422 | Dayton | 32 | F | 5 (1 health) | — |
| 40 | 45423 | Dayton | 32 | F | 5 (1 health) | — |
| 41 | 45427 | Dayton | 32 | F | 5 (1 health) | — |
| 42 | 45435 | Dayton | 32 | F | 5 (1 health) | — |
| 43 | 45437 | Dayton | 32 | F | 5 (1 health) | — |
| 44 | 45441 | Dayton | 32 | F | 5 (1 health) | — |
| 45 | 45448 | Dayton | 32 | F | 5 (1 health) | — |
| 46 | 45454 | Dayton | 32 | F | 5 (1 health) | — |
| 47 | 45463 | Dayton | 32 | F | 5 (1 health) | — |
| 48 | 45469 | Dayton | 32 | F | 5 (1 health) | — |
| 49 | 45470 | Dayton | 32 | F | 5 (1 health) | — |
| 50 | 45475 | Dayton | 32 | F | 5 (1 health) | — |
| 51 | 45479 | Dayton | 32 | F | 5 (1 health) | — |
| 52 | 45481 | Dayton | 32 | F | 5 (1 health) | — |
| 53 | 45482 | Dayton | 32 | F | 5 (1 health) | — |
| 54 | 45490 | Dayton | 32 | F | 5 (1 health) | — |
Recommended Buyer Guides for Montgomery County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best Water Filters for Lead — Lead above EPA action level in 42 ZIP codes
- 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
Deep Dive Reports
Detailed analysis for Montgomery County, Ohio
Overview
Montgomery County in Ohio covers 54 ZIP codes with an average Home Safety Score of D (42/100).
49 of 54 ZIP codes have recorded EPA violations. 44 health-based violations have been documented.
← Back to Ohio 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
Montgomery 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.