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Dayton, OH Tap Water Quality

Water safety reports for all 49 ZIP codes in Dayton, Ohio

Average Score

37/100

Health Violations

49

ZIP Codes

49

High Lead Risk

27

of 49 ZIP codes

F

About Tap Water in Dayton, OH

Tap water quality in Dayton, OH is a significant concern, currently receiving a below-average safety score of 37/100 across 49 ZIP codes. With 49 health-based violations recorded in the past 5 years, systems like Dayton Public Water System have struggled to maintain compliance with EPA regulations enforced by Ohio Environmental Protection Agency. Residents are strongly encouraged to utilize certified water filtration systems.

The accumulation of 49 health-based violations over the past 5 years highlights systemic challenges within Dayton's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by Ohio Environmental Protection Agency. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 27 out of 49 ZIP codes in Dayton are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.

⚠ Lead Risk Alert: Some ZIP codes in Dayton are rated High or Very High for lead exposure risk based on EPA data. Search your specific ZIP code for a detailed lead level report.

Health-Based Contaminant Violations in Dayton

EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Dayton water systems over the past 5 years.

Stage 2 DBP Rule

Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.

Water Quality by ZIP Code — Dayton, OH

Click any ZIP code for the full water quality report

D
45402

Dayton, OH

Score: 44/1001 violation
D
45403

Dayton, OH

Score: 44/1001 violation
D
45404

Dayton, OH

Score: 44/1001 violation
D
45405

Dayton, OH

Score: 44/1001 violation
D
45406

Dayton, OH

Score: 44/1001 violation
D
45409

Dayton, OH

Score: 44/1001 violation
D
45417

Dayton, OH

Score: 44/1001 violation
D
45428

Dayton, OH

Score: 44/1001 violation
D
45429

Dayton, OH

Score: 44/1001 violation
D
45430

Dayton, OH

Score: 44/1001 violation
D
45432

Dayton, OH

Score: 44/1001 violation
D
45434

Dayton, OH

Score: 44/1001 violation
D
45458

Dayton, OH

Score: 44/1001 violation
F
45414

Dayton, OH

Score: 39/1001 violation
F
45415

Dayton, OH

Score: 39/1001 violation
F
45419

Dayton, OH

Score: 39/1001 violation
F
45420

Dayton, OH

Score: 39/1001 violation
F
45424

Dayton, OH

Score: 39/1001 violation
F
45426

Dayton, OH

Score: 39/1001 violation
F
45431

Dayton, OH

Score: 39/1001 violation
F
45439

Dayton, OH

Score: 39/1001 violation
F
45440

Dayton, OH

Score: 39/1001 violation
F
45449

Dayton, OH

Score: 39/1001 violation
F
45459

Dayton, OH

Score: 39/1001 violation
F
45400

Dayton, OH

Score: 32/1001 violation
F
45401

Dayton, OH

Score: 32/1001 violation
F
45408

Dayton, OH

Score: 32/1001 violation
F
45410

Dayton, OH

Score: 32/1001 violation
F
45412

Dayton, OH

Score: 32/1001 violation
F
45413

Dayton, OH

Score: 32/1001 violation
F
45416

Dayton, OH

Score: 32/1001 violation
F
45418

Dayton, OH

Score: 32/1001 violation
F
45422

Dayton, OH

Score: 32/1001 violation
F
45423

Dayton, OH

Score: 32/1001 violation
F
45427

Dayton, OH

Score: 32/1001 violation
F
45433

Dayton, OH

Score: 32/1001 violation
F
45435

Dayton, OH

Score: 32/1001 violation
F
45437

Dayton, OH

Score: 32/1001 violation
F
45441

Dayton, OH

Score: 32/1001 violation
F
45448

Dayton, OH

Score: 32/1001 violation
F
45454

Dayton, OH

Score: 32/1001 violation
F
45463

Dayton, OH

Score: 32/1001 violation
F
45469

Dayton, OH

Score: 32/1001 violation
F
45470

Dayton, OH

Score: 32/1001 violation
F
45475

Dayton, OH

Score: 32/1001 violation
F
45479

Dayton, OH

Score: 32/1001 violation
F
45481

Dayton, OH

Score: 32/1001 violation
F
45482

Dayton, OH

Score: 32/1001 violation
F
45490

Dayton, OH

Score: 32/1001 violation

Frequently Asked Questions — Dayton Water Quality

Is tap water safe to drink in Dayton, OH?+
Tap water in Dayton has a grade of F, indicating compliance concerns in recent years. Families with young children or pregnant women should consider using a certified NSF/ANSI 53 water filter for drinking and cooking.
What is the water quality score for Dayton?+
The average water quality score across 49 ZIP codes in Dayton, OH is 37/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Dayton have lead in its tap water?+
27 out of 49 ZIP codes in Dayton are rated High or Very High for lead exposure risk. Older homes built before 1986 may have lead service lines or plumbing fixtures. Residents should run their tap for 30 seconds before use and consider a certified NSF/ANSI 53 lead filter.
How do I get the water quality report for Dayton?+
Each ZIP code in Dayton has a full water quality report on this site — click any ZIP code below. You can also get the annual Consumer Confidence Report (CCR) from your local water utility. The CCR is required to be published every year by July 1 and contains actual contaminant measurements and violation history.
Where does Dayton's tap water come from?+
Tap water in Dayton, OH primarily comes from surface water. Surface water systems treat water from rivers, lakes, or reservoirs using filtration, sedimentation, and disinfection before it reaches your tap.

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