COUNTY REPORT OH

Hamilton County, Ohio

79 ZIP codes · Avg score 41/100 · Grade D · Updated

ZipCheckup grade for Hamilton County: D.

Several federal signals point to home-safety risks in this ZIP.

Your top priority: see the breakdown below and consider a certified water filter. NSF certified filters →

Water monitoring data from Hamilton County's 79 ZIP codes tells a below-average story - health violations are present and system-level detail is worth checking.

How Hamilton County Compares

Hamilton County41/100
Ohio avg60/100
National avg73/100

How Hamilton County Compares

D
County Grade
41/100
Avg Safety Score
79
ZIP Codes
16
Water Systems

Hamilton County scores 19 points below the Ohio state average (60/100) and 32 points below the national average (73/100).

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:

D
County Grade
41
Avg Safety Score
79
ZIP Codes
Miamitown
Best ZIP: 45041 (42/100)
Cincinnati
Lowest ZIP: 45215 (35/100)
$223K
Median Home Value
$2,359
Avg Remediation (106% of home value)

ZIP Code Risk Map

Water Quality Map: Hamilton County, Ohio

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 13.2 (asthma 11.4%, diabetes 13.2%)

Estimated additional annual cost per homeowner: $1,580, driven primarily by flood

78.7% of homes built before 1978 (lead paint era)

Violation History (2024–2025)

→ Stable trend

EPA violation counts by year across Hamilton County water systems. Health-based shown in red, total in blue.

2024
2 (2 health)
2025
90 (90 health)

Peak year: 2025 with 90 violations. Past 5 years: 92 total (92 health-based).

Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.

County Health Indicators vs National Average

Asthma 11.4% (national: 8.9%)
Diabetes 13.2% (national: 10.5%)
Obesity 35.6% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1955
Median Build Year
78.7%
Pre-1978 Housing
44/100
Infrastructure Stress Indicator
54%
ZIPs with High Infrastructure Stress
High
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $1,580

Flood $1,017/yr
Energy Code Gap $499/yr
Water / Lead $295/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

385,307 housing units in Hamilton County

Pre-1940 25%
1940–1959 22%
1960–1979 27%
1980–1999 17%
2000+ 10%

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 Hamilton County

$223K
Median Home Value
$2,359
Est. Remediation Cost
1.1%
of Home Value
Remediation as % of home value low burden

Remediation costs are relatively manageable for most homeowners in Hamilton 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 Hamilton County residents

Asthma 11.4% (US avg: 8.9%)
Diabetes 13.2% (US avg: 11%)
Obesity 35.6% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems serving Hamilton County

8 community water systems serving Hamilton County.

Show all 8 water systems

16 total water systems serve Hamilton County.

Systems with the most violations in Hamilton County

5 water systems with recorded EPA violations.

All ZIP Codes in Hamilton County

79 ZIP codes tracked in Hamilton County.

# ZIP Code City Safety Score Grade Violations Home Value
1 45041 Miamitown 42 D 0 —
2 45111 Camp Dennison 42 D 0 $202K
3 45174 Terrace Park 42 D 0 $581K
4 45202 Cincinnati 42 D 0 $444K
5 45203 Cincinnati 42 D 0 $296K
6 45204 Cincinnati 42 D 0 $93K
7 45205 Cincinnati 42 D 0 $113K
8 45206 Cincinnati 42 D 0 $270K
9 45207 Cincinnati 42 D 0 $192K
10 45208 Cincinnati 42 D 0 $491K
11 45209 Cincinnati 42 D 0 $387K
12 45211 Cincinnati 42 D 0 $157K
13 45212 Cincinnati 42 D 0 $229K
14 45213 Cincinnati 42 D 0 $259K
15 45214 Cincinnati 42 D 0 $102K
16 45216 Cincinnati 42 D 0 $138K
17 45217 Cincinnati 42 D 0 $149K
18 45218 Cincinnati 42 D 0 $170K
19 45219 Cincinnati 42 D 0 $223K
20 45220 Cincinnati 42 D 0 $385K
21 45223 Cincinnati 42 D 0 $204K
22 45224 Cincinnati 42 D 0 $174K
23 45225 Cincinnati 42 D 0 $108K
24 45226 Cincinnati 42 D 0 $387K
25 45227 Cincinnati 42 D 0 $256K
26 45229 Cincinnati 42 D 0 $316K
27 45230 Cincinnati 42 D 0 $237K
28 45232 Cincinnati 42 D 0 $123K
29 45233 Cincinnati 42 D 0 $271K
30 45238 Cincinnati 42 D 0 $169K
31 45239 Cincinnati 42 D 0 $156K
32 45240 Cincinnati 42 D 0 $177K
33 45243 Cincinnati 42 D 0 $617K
34 45247 Cincinnati 42 D 0 $268K
35 45251 Cincinnati 42 D 0 $176K
36 45252 Cincinnati 42 D 0 $313K
37 45231 Cincinnati 41 D 1 $165K
38 45242 Cincinnati 41 D 1 $421K
39 45244 Cincinnati 41 D 2 $346K
40 45241 Cincinnati 40 D 5 $292K
41 45246 Cincinnati 40 D 5 $190K
42 45249 Cincinnati 40 D 5 $485K
43 45255 Cincinnati 40 D 3 $279K
44 45001 Addyston 38 F 3 $122K
45 45052 North Bend 38 F 3 $284K
46 45248 Cincinnati 38 F 3 $206K
47 45002 Cleves 37 F 4 $281K
48 45030 Harrison 36 F 5 $235K
49 45236 Cincinnati 36 F 6 $219K
50 45237 Cincinnati 36 F 6 $159K
51 45215 Cincinnati 35 F 7 $200K
52 45033 Hooven — — $81K
53 45051 Mount Saint Joseph — — 0 —
54 45201 Cincinnati — — —
55 45221 Cincinnati — — —
56 45222 Cincinnati — — —
57 45234 Cincinnati — — —
58 45235 Cincinnati — — —
59 45250 Cincinnati — — —
60 45253 Cincinnati — — —
61 45254 Cincinnati — — —
62 45258 Cincinnati — — —
63 45262 Cincinnati — — —
64 45263 Cincinnati — — —
65 45264 Cincinnati — — —
66 45267 Cincinnati — — 0 —
67 45268 Cincinnati — — —
68 45269 Cincinnati — — —
69 45270 Cincinnati — — —
70 45271 Cincinnati — — —
71 45273 Cincinnati — — —
72 45274 Cincinnati — — —
73 45275 Cincinnati — — —
74 45277 Cincinnati — — —
75 45280 Cincinnati — — —
76 45296 Cincinnati — — —
77 45298 Cincinnati — — —
78 45299 Cincinnati — — —
79 45999 Cincinnati — — —

Recommended Buyer Guides for Hamilton County

Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.

Deep Dive Reports

Detailed analysis for Hamilton County, Ohio

Overview

Hamilton County in Ohio covers 79 tracked ZIP records with an average Home Safety Score of D (41/100) across 51 scored records.

15 of 53 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. The available record reports no health-based violations for this measured scope.

← Back to Ohio Home Safety Profile

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

What You Can Do

Hamilton County has a grade of D. Here are steps to protect your household.

1

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.

2

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

3

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.

4

Check for lead in your home

78.7% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.

Frequently Asked Questions

Is water safe in Hamilton County?
Hamilton County receives a grade of D. 0 of 79 ZIP codes have health-based violations. Independent water testing is recommended.
How many water systems serve Hamilton County?
Hamilton County is served by 16 public water systems that supply drinking water to residents across 79 ZIP codes.
What is the biggest environmental risk in Hamilton County?
The primary environmental risk factor in Hamilton County is flood. This contributes to an estimated additional annual cost of $1,580 per homeowner.
How old are homes in Hamilton County?
The median home build year in Hamilton County is 1955. 78.7% of homes were built before 1978, which means they may contain lead-based paint and older plumbing materials.
How does Hamilton County compare to Ohio?
Hamilton County has an average Home Safety Score of 41/100 under model 4.0.0, which is below the Ohio state average of 60/100.

How to cite this page

APA ZipCheckup. (2026). Hamilton County, OH: HSS 41/100; 25 Violations. https://zipcheckup.com/county/ohio/hamilton/
BibTeX 
@misc{zipcheckup-county-ohio-hamilton,
  author = {{ZipCheckup}},
  title  = {{Hamilton County, OH: HSS 41/100; 25 Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/ohio/hamilton/}
}

Page version: August 2026.

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