B78/100
RIB MOUNTAIN WATER UTILITY — Water Quality Report 2026
Serving 6,398 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI7370660
Violations
3
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.009 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.004 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
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
Frequently Asked Questions About RIB MOUNTAIN WATER UTILITY
Is RIB MOUNTAIN WATER UTILITY water safe to drink?
RIB MOUNTAIN WATER UTILITY water receives a grade of B (78/100), which is considered good. Out of 31 contaminants tested, 2 exceed EPA legal limits. 3 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has RIB MOUNTAIN WATER UTILITY detected?
31 contaminants were tested in RIB MOUNTAIN WATER UTILITY's water. Notable contaminants include PFOS, PFOA, Lead (90th percentile). 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does RIB MOUNTAIN WATER UTILITY have any EPA violations?
Yes, RIB MOUNTAIN WATER UTILITY has 3 EPA violation(s) on record, with the most recent in 2018. Violation types include MR, Other.
How many people does RIB MOUNTAIN WATER UTILITY serve?
RIB MOUNTAIN WATER UTILITY serves approximately 6,398 people, Wisconsin. The system provides water to 1 community: Wausau.
What type of water does RIB MOUNTAIN WATER UTILITY provide?
RIB MOUNTAIN WATER UTILITY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI7370660.
How does RIB MOUNTAIN WATER UTILITY compare to other utilities in Wisconsin?
RIB MOUNTAIN WATER UTILITY scores 78/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Wisconsin state page for a full comparison of water systems.