F8/100
Dayton Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 25,054 residents · Tennessee
What's In Dayton's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
1
Health-Related
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2024 – March 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issued
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
DAYTON WATER DEPT
Population Served
25,054
Water Source
Surface Water
System ID
TN0000174
Frequently Asked Questions About Dayton Water
Is Dayton tap water safe to drink?
Dayton, Tennessee tap water receives a grade of F (8/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 49 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Dayton's water?
Of the 69 contaminants tested in Dayton's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Dayton have any water quality violations?
Yes, Dayton has 49 EPA violation(s) on record, with the most recent in 2024. Violation types include MCL, MR, Other. 10 of these are health-based violations, which are the most serious category.
Do I need a water filter in Dayton?
Dayton water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Dayton's tap water come from?
Dayton's drinking water is sourced from surface water and supplied by DAYTON WATER DEPT. The system serves approximately 25,054 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Dayton's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Dayton's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Dayton's water compare to other cities in Tennessee?
Dayton's water quality score of 8/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Tennessee state page to see how all cities in the state compare.
What should I do if I'm concerned about Dayton's water quality?
If you have concerns about Dayton's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (DAYTON WATER DEPT) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.