F2/100
Oakville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 9,972 residents · Connecticut
What's In Oakville's Tap Water?
34
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: August 10, 2025 – August 27, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2024 – January 29, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – July 10, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: August 10, 2023 – July 13, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – June 30, 2023Enforcement: Resolving — corrective action underway
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
WATERTOWN WATER & SEWER AUTHORITY
Population Served
9,972
Water Source
Purchased Surface Water
System ID
CT1530021
Frequently Asked Questions About Oakville Water
Is Oakville tap water safe to drink?
Oakville, Connecticut tap water receives a grade of F (2/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 55 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Oakville's water?
Of the 34 contaminants tested in Oakville'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 Oakville have any water quality violations?
Yes, Oakville has 55 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 10 of these are health-based violations, which are the most serious category.
Do I need a water filter in Oakville?
Oakville 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 Oakville's tap water come from?
Oakville's drinking water is sourced from purchased surface water and supplied by WATERTOWN WATER & SEWER AUTHORITY. The system serves approximately 9,972 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Oakville'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. Oakville'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 Oakville's water compare to other cities in Connecticut?
Oakville's water quality score of 2/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Connecticut state page to see how all cities in the state compare.
What should I do if I'm concerned about Oakville's water quality?
If you have concerns about Oakville'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 (WATERTOWN WATER & SEWER AUTHORITY) 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.