STATE REPORT OH 259 HEALTH VIOLATIONS

Ohio Home Safety Profiles by ZIP

1435 ZIP codes · 639 water systems · IPC plumbing code · Updated

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData, NWS, State plumbing boards, Rewiring America

ZipCheckup tracks drinking-water and home-safety data for 1,435 ZIP codes across Ohio, covering 639 public water systems that serve about 9,353,819 people. 741 ZIP codes carry at least one EPA violation on record.

1435
ZIP Codes
639
Water Systems
741
ZIPs with Violations
IPC
Plumbing Code
C · 60
Avg Safety Score
27
ZIPs Exceeding Lead Limit
63%
High Radon Risk (Zone 1)
#48
of 50 States
31%
ZIPs Rated A or B
82%
ZIPs with Violations
C
Ohio average: 60/100 - ranked #48 of 50 states. 13 points below the national average (73). 82% of ZIP codes have recorded violations.

Across multiple regions, Ohio drinking water compliance sits below the federal baseline - MCL exceedances are on record in several districts.

Score Distribution

How Ohio's 1435 ZIP codes are distributed across safety grades.

0
A
164
B
156
C
174
D
28
F
85-10070-8455-6940-540-39

Home Safety Scores by State

Loading map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

Model 4.0.0 inputs: EPA SDWIS, UCMR5 PFAS, EPA radon zones, annual county AQI •

Top 10 Safest ZIP Codes in Ohio

Highest Home Safety Scores in the state.

#ZIP CodeCityCountyScoreGrade
1 43403 Bowling GreenWood 83 B
2 43451 PortageWood 83 B
3 43511 CustarWood 83 B
4 44012 Avon LakeLorain 83 B
5 44026 ChesterlandGeauga 83 B
6 44045 Grand RiverLake 83 B
7 44047 JeffersonAshtabula 83 B
8 44060 MentorLake 83 B
9 44065 NewburyGeauga 83 B
10 44072 NoveltyGeauga 83 B

10 Lowest-Scoring ZIP Codes in Ohio

#ZIP CodeCityCountyScoreGradeViolations
1 43207 ColumbusFranklin 25 F 19
2 43137 LockbourneFranklin 25 F 35
3 43119 GallowayFranklin 28 F 17
4 43125 GroveportFranklin 32 F 11
5 43123 Grove CityFranklin 32 F 11
6 45011 HamiltonButler 33 F 16
7 43950 Saint ClairsvilleBelmont 33 F 55
8 43935 Martins FerryBelmont 33 F 34
9 43912 BridgeportBelmont 33 F 34
10 45215 CincinnatiHamilton 35 F 7

County Rankings

Water quality breakdown by county. 88 counties with data in Ohio.

Loading county map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

County-level aggregation of measured ZIP Home Safety Scores • EPA SDWIS, UCMR 5 PFAS, EPA radon zones, EPA AirData

CountyAvg ScoreGradeZIPsBest ZIPWorst ZIP
39001 N/A N/A 9 N/A N/A
39003 65 C 14 45817 (66) 45807 (64)
39005 N/A N/A 11 N/A N/A
39007 77 B 16 44047 (83) 44041 (67)
39009 75 B 18 45735 (83) 45710 (59)
39011 N/A N/A 9 N/A N/A
39013 49 D 27 43933 (65) 43950 (33)
39015 N/A N/A 11 N/A N/A
39017 46 D 22 45056 (58) 45011 (33)
39019 N/A N/A 11 N/A N/A
39021 N/A N/A 10 N/A N/A
39023 63 C 15 45323 (66) 45344 (56)
39025 62 C 16 45160 (66) 45150 (53)
39027 55 C 10 45159 (67) 45107 (38)
39029 N/A N/A 22 N/A N/A
39031 N/A N/A 10 N/A N/A
39033 N/A N/A 10 N/A N/A
39035 74 B 63 44040 (75) 44022 (66)
39037 N/A N/A 16 N/A N/A
39039 N/A N/A 8 N/A N/A
39041 50 D 11 43021 (50) 43003 (47)
39043 N/A N/A 11 N/A N/A
39045 N/A N/A 13 N/A N/A
39047 N/A N/A 5 N/A N/A
39049 40 D 65 43002 (42) 43207 (25)
39051 N/A N/A 8 N/A N/A
39053 N/A N/A 8 N/A N/A
39055 82 B 13 44026 (83) 44024 (79)
39057 57 C 17 45301 (65) 45305 (46)
39059 N/A N/A 14 N/A N/A
39061 41 D 79 45041 (42) 45215 (35)
39063 N/A N/A 13 N/A N/A
39065 N/A N/A 8 N/A N/A
39067 N/A N/A 10 N/A N/A
39069 N/A N/A 11 N/A N/A
39071 N/A N/A 6 N/A N/A
39073 N/A N/A 10 N/A N/A
39075 N/A N/A 15 N/A N/A
39077 N/A N/A 11 N/A N/A
39079 N/A N/A 6 N/A N/A
39081 57 C 20 43910 (61) 43963 (50)
39083 54 D 8 43022 (64) 43050 (45)
39085 83 B 12 44045 (83) 44077 (82)
39087 64 C 11 45623 (67) 45638 (53)
39089 61 C 23 43018 (67) 43031 (45)
39091 N/A N/A 14 N/A N/A
39093 79 B 16 44012 (83) 44035 (64)
39095 73 B 44 43504 (73) 43566 (70)
39097 53 D 6 43162 (62) 43064 (42)
39099 72 B 30 44114 (83) 44406 (61)
39101 N/A N/A 12 N/A N/A
39103 79 B 16 44235 (82) 44253 (76)
39105 N/A N/A 12 N/A N/A
39107 N/A N/A 9 N/A N/A
39109 59 C 14 45339 (65) 45383 (49)
39111 N/A N/A 11 N/A N/A
39113 51 D 52 45435 (65) 45309 (41)
39115 N/A N/A 3 N/A N/A
39117 N/A N/A 9 N/A N/A
39119 N/A N/A 17 N/A N/A
39121 69 C 8 43732 (80) 43724 (52)
39123 N/A N/A 13 N/A N/A
39125 N/A N/A 9 N/A N/A
39127 N/A N/A 10 N/A N/A
39129 N/A N/A 8 N/A N/A
39131 N/A N/A 9 N/A N/A
39133 74 B 18 44272 (83) 44240 (58)
39135 64 C 11 45003 (67) 45347 (57)
39137 N/A N/A 14 N/A N/A
39139 N/A N/A 14 N/A N/A
39141 N/A N/A 11 N/A N/A
39143 N/A N/A 9 N/A N/A
39145 75 B 14 45652 (83) 45694 (61)
39147 N/A N/A 13 N/A N/A
39149 N/A N/A 13 N/A N/A
39151 64 C 41 44614 (66) 44662 (55)
39153 51 D 49 44056 (66) 44333 (39)
39155 66 C 30 44485 (83) 44425 (60)
39157 N/A N/A 18 N/A N/A
39159 N/A N/A 10 N/A N/A
39161 N/A N/A 9 N/A N/A
39163 N/A N/A 5 N/A N/A
39165 47 D 14 45050 (62) 45140 (35)
39167 70 B 21 45724 (83) 45750 (50)
39169 N/A N/A 15 N/A N/A
39171 N/A N/A 10 N/A N/A
39173 82 B 30 43403 (83) 43619 (80)
39175 N/A N/A 8 N/A N/A

Most Common Contaminants in Ohio

Contaminant / RuleCategoryZIPs AffectedViolationsHealth Risk
Surface Water Treatment Rule Treatment Technique 584 1828 No
Stage 2 DBP Rule Treatment Technique 386 798 Yes
Total Trihalomethanes (TTHM) Disinfection Byproducts 245 415 Yes
Stage 1 DBP Rule Treatment Technique 194 322 Yes
Haloacetic Acids (HAA5) Disinfection Byproducts 185 518 Yes
Lead and Copper Rule Treatment Technique 185 335 No
Consumer Confidence Report Rule Reporting 160 251 Yes
Fecal Coliform Microbiological 78 136 Yes

Overview

We track multi-source home safety signals for 1435 ZIP records across Ohio. Home Safety Score model 4.0.0 is published for 522 scored records; missing required evidence suppresses the score.

The EPA snapshots used for this build directly map water systems to 907 ZIP records, covering 639 community water systems that serve approximately 9,353,819 people.

741 of 907 ZIP codes with a reported violation count in the available EPA record (82%) have recorded EPA violations. 259 health-based violations appear in the available health breakdown.

Plumbing Regulations

Ohio follows the Ohio Plumbing Code (based on IPC) (2017 edition).

  • Plumbing code: IPC (2017)
  • Homeowner DIY: Allowed with permit
  • Water heater permit: Required
  • Annual backflow test: Required

Full Ohio regulations →

Areas with Most Violations

ZIP Code City Home Safety Grade Violations Health-Based System
43943 Rayland — 58 3 Dillonvale
43950 Saint Clairsville F 55 5 St. Clairsville, City of Public Water System
43977 Flushing D 41 4 Flushing Village Public Water System
43907 Cadiz — 39 8 Cadiz Village Public Water System
43917 Dillonvale — 38 3 Dillonvale
45140 Loveland F 36 0 Clermont Public Water System
43137 Lockbourne F 35 2 Columbus Public Water System
43830 Nashport — 35 17 Muskingum County Water - Se
43912 Bridgeport F 34 4 Belmont Company Sanitary District 3 Public Water System
43935 Martins Ferry F 34 4 Martins Ferry Public Water System

Areas with No Violations

ZIP Code City Home Safety Grade System Population
43002 Amlin D Columbus Public Water System 1,305,946
43011 Centerburg D Del-Company Water Company, Inc. 150,000
43018 Etna C Licking Regional Water District 17,818
43021 Galena D Del-Company Water Company, Inc. 150,000
43026 Hilliard D Columbus Public Water System 1,305,946
43030 Jacksontown — Licking County Harbor Hills Public Water System 3,415
43033 Kirkersville C Licking Regional Water District 17,818
43035 Lewis Center D Del-Company Water Company, Inc. 150,000
43065 Powell D Del-Company Water Company, Inc. 150,000
43068 Reynoldsburg D Columbus Public Water System 1,305,946

Home Safety Score

Average Home Safety Score for Ohio: C (60/100) across 522 scored of 1435 tracked ZIP records.

Model 4.0.0 uses the canonical components water-compliance, pfas-mcl-screen, radon-zone, annual-aqi across 3 required domains. The sections below provide additional context and do not change that score. Missing required evidence suppresses the score, and a favorable result is not a property-level safety certification.

Lead & Copper

  • Average lead level (90th percentile): 0.0146 mg/L (EPA action level: 0.015 mg/L)
  • 27 of 907 ZIP codes with known status exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 909 ZIP codes (63%)
  • Moderate risk (Zone 2): 526 ZIP codes
  • Low risk (Zone 3): 0 ZIP codes

ZIP Code Reports for Ohio

Largest Communities

ZIP Code City Population Safety Grade Violations
44264 Peninsula 1,648,454 D 10
44236 Hudson 1,648,234 D 9
44056 Macedonia 1,588,955 C 2
44286 Richfield 1,588,955 C 2
43015 Delaware 1,526,610 D 3
43081 Westerville 1,500,339 D 0
43035 Lewis Center 1,494,946 D 0
43082 Westerville 1,494,946 D 0
43240 Columbus 1,494,946 D 0
43054 New Albany 1,489,204 D 1
43064 Plain City 1,486,639 D 17
43016 Dublin 1,481,733 D 1
43017 Dublin 1,481,517 D 1
43031 Johnstown 1,463,381 D 10
44256 Medina 1,459,068 B 7
43235 Columbus 1,458,446 D 0
43065 Powell 1,455,946 D 0
43085 Columbus 1,455,946 D 0
44149 Strongsville 1,428,404 B 6
44280 Valley City 1,428,404 B 6

Lowest Published Home Safety Scores

ZIP Code City Score Grade Violations
43137 Lockbourne 25 F 35
43207 Columbus 25 F 19
43119 Galloway 28 F 17
43123 Grove City 32 F 11
43125 Groveport 32 F 11

Highest Published Home Safety Scores

ZIP Code City Score Grade Violations
43403 Bowling Green 83 B 0
43451 Portage 83 B 0
43511 Custar 83 B 0
44012 Avon Lake 83 B 1
44026 Chesterland 83 B 1

All 1435 ZIP Codes in Ohio

Data Sources

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

Largest water systems in Ohio

The 12 biggest community water systems serving Ohio, of 639 total.

Show all 12 water systems

Systems with the most violations in Ohio

12 systems in Ohio with the most recorded EPA violations.

Frequently Asked Questions

Is the water safe to drink in Ohio?

Ohio has 639 community water systems serving 9,353,819 people across 1435 ZIP codes. There are 1,679 recorded violations, including 259 health-based. 741 of 1435 ZIP codes have at least one violation.

What plumbing code does Ohio follow?

Ohio follows the IPC plumbing code. DIY plumbing work is allowed for homeowners.

Is lead a concern in Ohio's drinking water?

27 ZIP codes in Ohio have lead levels exceeding the EPA action level of 0.015 mg/L.

What is the radon risk in Ohio?

63% of ZIP codes in Ohio fall in EPA Radon Zone 1 (highest risk).

How to cite this page

APA ZipCheckup. (2026). Ohio Home Safety Profiles by ZIP. https://zipcheckup.com/states/ohio/
BibTeX 
@misc{zipcheckup-states-ohio,
  author = {{ZipCheckup}},
  title  = {{Ohio Home Safety Profiles by ZIP}},
  year   = {2026},
  url    = {https://zipcheckup.com/states/ohio/}
}

Page version: August 2026.

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