B76/100
Three Oaks Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,622 residents · Michigan
What's In Three Oaks's Tap Water?
27
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.008 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – November 11, 2021Enforcement: 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
THREE OAKS
Population Served
1,622
Water Source
Groundwater
System ID
MI0006600
Frequently Asked Questions About Three Oaks Water
Is Three Oaks tap water safe to drink?
Three Oaks, Michigan tap water receives a grade of B (76/100), which is considered good. Out of 27 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Three Oaks's water?
Of the 27 contaminants tested in Three Oaks'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 Three Oaks have any water quality violations?
Yes, Three Oaks has 9 EPA violation(s) on record, with the most recent in 2021. Violation types include Other, MCL, MR. 3 of these are health-based violations, which are the most serious category.
Do I need a water filter in Three Oaks?
Three Oaks 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 Three Oaks's tap water come from?
Three Oaks's drinking water is sourced from groundwater and supplied by THREE OAKS. The system serves approximately 1,622 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Three Oaks'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. Three Oaks'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 Three Oaks's water compare to other cities in Michigan?
Three Oaks's water quality score of 76/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Michigan state page to see how all cities in the state compare.
What should I do if I'm concerned about Three Oaks's water quality?
If you have concerns about Three Oaks'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 (THREE OAKS) 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.