Official EPA SDWIS Verified ReportWater Quality & Testing GuideHistorical Record: No Recorded SDWIS Violations

ZIP Code 45424 Water Quality & Testing Report

Dayton, OH · Montgomery County County · Updated for 2026

Compiled & verified by Sahajul Haque from official EPA SDWIS records

Public Health & Medical Notice: Drinking water quality data on this page reflects historical compliance records submitted under the Safe Drinking Water Act. This information does not constitute medical advice or a real-time safety guarantee. If you are pregnant, nursing, preparing infant formula, or immunocompromised, consult a healthcare provider. Boiling water kills biological pathogens, but does NOT remove chemical contaminants like lead, arsenic, or PFAS.

Quick EPA Verified Answer

Is Tap Water Safe to Drink in ZIP 45424 (Dayton, OH)?

Caution / Filtration Recommended: Tap water in ZIP code 45424 (Dayton, OH) has compliance concerns, earning an EPA Safety Grade of F (39/100) due to 1 health violation(s) and 470.0 ppb lead. While treated by Dayton Public Water System, residents are advised to use an NSF/ANSI 53 certified water filter for drinking and cooking.

Safety Score

Water Safety Grade

Failing — Serious compliance issues

Health Violations

Total Violations

Lead Risk

Very High

Contaminants

About Tap Water in ZIP Code 45424

Tap water in ZIP code 45424 (Dayton, OH) is distributed by Dayton Public Water System (EPA ID: OH5703512), serving approximately 141,407 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of F with a composite quality score of 39/100.

Water System

Dayton Public Water System

EPA ID: OH5703512

Water Source

Surface Water

Population Served

141,407 residents

County

Montgomery County County, Ohio

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Lead Levels in ZIP 45424

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 470.0 ppb — EXCEEDS EPA Action Level

The 90th percentile lead level in 45424 is 470.0 ppb, which EXCEEDS the EPA action level of 15 ppb. Immediate action is recommended. Use a certified NSF/ANSI 53 filter or bottled water for drinking and cooking.

Lead exposure risk in 45424 is rated Very High. EPA models estimate a 79% exposure probability based on housing and infrastructure age.

Lead Level (90th percentile)

470.00 ppb (0.47 mg/L)

Lead Exposure Risk Rating

Very High

Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

79%

Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.

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Water Hardness & Mineral Content

Grains per gallon (GPG) & Parts per million (PPM / mg/L)

Classification: Hard7.4 GPG · 127 mg/L

Water in ZIP 45424 is Hard (127 mg/L / 7.4 GPG). Residents may notice white mineral spots on glassware, reduced soap efficiency, and mineral scale on faucets and showerheads.

Recommendation: An ion-exchange water softener or descaler is recommended to prolong the life of water heaters, dishwashers, and plumbing.

Hardness (GPG)

Grains per gallon

7.4 GPG

Hardness (PPM / mg/L)

Parts per million CaCO3

127 mg/L

Appliance Scaling Risk

High / Severe

Official EPA SDWIS Database Entry

Utility: Dayton Public Water System · PWSID: OH5703512

Verify on EPA.gov

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Violation History

Past 5 years — EPA SDWIS data

Dayton Public Water System has recorded 1 health-based violation out of 5 total violations over the past 5 years. 2 violations remain unresolved in EPA tracking records.

Total Violations (5 yr)

Health-Based Violations

Unresolved Violations

Boil Water Advisories

Compliance Risk

High

Regulatory compliance risk for this utility is rated High based on past reporting and enforcement records.

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Contaminants Detected

Contaminants with health-based violations on record

EPA records identify 1 contaminant with health-based violations in the past 5 years: Stage 2 DBP Rule.

Stage 2 DBP Rule

⚖ Enforcement Actions

EPA or state regulators have issued 10 enforcement actions to address compliance lapses.

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Water Source & Environmental Factors

Surface Water

This system draws water from lakes, rivers, or reservoirs. Surface water is treated to remove sediment, microorganisms, and chemical contaminants before reaching taps.

Water Source Type

Surface Water

CCR Source Classification

Surface Water and Ground Water

EPA Radon Zone

Highest potential

Zone 1

Annual Flood Risk Cost

Estimated annual flood-related costs per property

Energy Burden

% of household income spent on energy — indicator of older infrastructure

1.77%

EPA Radon Zone 1 — highest potential for radon in indoor air. Homeowners should test their home for radon and consider mitigation if levels exceed 4 pCi/L.

Water Quality Testing in ZIP 45424

Tap Water & Well Testing Recommendations

Residents in ZIP code 45424 served by Dayton Public Water System can test tap water or private well systems to verify water purity. Testing detects hidden contaminants before they impact family health.

Tap Water Testing Steps

1.Conduct a certified lead check if your home was constructed before 1986.
2.Use certified lab testing kits rather than uncalibrated test strips for regulated compliance.
3.Sample water from both your kitchen faucet and water heater to compare line purity.

Private Well Testing Steps

•Test for Coliform bacteria and Nitrates annually.
•Test for heavy metals, radon, and PFAS every 3 years.
•Send samples to a state-certified drinking water laboratory recognized by Ohio Environmental Protection Agency.

Certified Lab Testing: Always use an EPA-certified drinking water laboratory in OH for formal legal or real estate compliance testing.

🛡 What Should You Do? — ZIP 45424 Recommendations

Serious water quality concerns — action recommended

Your water system has significant compliance issues. We strongly recommend protective measures.

🚨 Install a certified NSF/ANSI 53 or 58 (reverse osmosis) filter immediately for drinking and cooking
🚨 Do not give unfiltered water to children, pregnant women, or immunocompromised individuals
🚨 Contact Dayton Public Water System to request the current violation status and corrective action plan
🚨 Report concerns to your state environmental agency or call the EPA hotline: 1-800-426-4791
🚨 Consider having your home's tap water independently tested by a certified lab

Recommended Water Treatment Systems:

REQUIRED FOR SAFETY

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NSF 53 Lead Pitcher Filter

Certified to remove lead. Recommended for immediate protection.

Lead Filter Guide →

STRONGLY RECOMMENDED

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NSF 58 Under-Sink RO System

Reverse Osmosis system certified to remove PFAS, heavy metals, and viruses.

RO System Guide →

Frequently Asked Questions — ZIP 45424 Water Quality

Is tap water safe to drink in ZIP code 45424?+

Tap water in 45424 has a below-average safety grade of F due to compliance issues. We recommend using a certified water filter for drinking and cooking.

How do I get my water tested in ZIP 45424 (Dayton, OH)?+

To test water quality in ZIP 45424, you can order a certified drinking water test kit or send water samples to an EPA/NELAP certified laboratory in OH. Certified testing checks for lead, coliform bacteria, nitrates, hardness, and PFAS that standard test strips miss. Contact Ohio Environmental Protection Agency for a list of certified regional labs.

How hard is the tap water in 45424?+

Tap water in 45424 is classified as Hard with an estimated mineral hardness of 127 mg/L (7.4 GPG). An ion-exchange water softener or descaler is recommended to prolong the life of water heaters, dishwashers, and plumbing.

Should I test private well water in 45424?+

Yes. Unlike municipal systems, private wells in 45424 are not regulated by the EPA or local utilities. Private well owners should test their water annually for coliform bacteria and nitrates, and every 3 to 5 years for heavy metals (lead, arsenic) and volatile organic compounds.

What is the lead level in 45424 tap water?+

The 90th percentile lead level in 45424 is 470.0 ppb. The EPA action level is 15 ppb. This exceeds the action level — a certified lead-reducing filter is recommended.

Is there an active boil water notice in 45424?+

There are currently no active boil water advisories on record for 45424. Water treatment systems are operating within normal parameters.

Who provides tap water to 45424?+

Tap water in ZIP code 45424 is provided by Dayton Public Water System (EPA ID: OH5703512), serving approximately 141,407 residents.

What water filter should I use in 45424?+

Based on water metrics for 45424, we recommend Reverse Osmosis (PFAS & Lead). Look for certifications such as NSF/ANSI 58 (Reverse Osmosis), NSF/ANSI 53 (Lead & VOCs), NSF/ANSI P473 (PFAS/PFOS).

Data Sources & Methodology

Water quality data for ZIP code 45424 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by Dayton Public Water System. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →