Is Mi Wuk Village, CA Tap Water Safe to Drink?
Graded B+, with 6 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
82.4/100
waterverge.com Mi Wuk Village, CA — Water Quality Report
Mi Wuk Village's drinking water received a grade of B+ (82.4 out of 100), indicating good water quality. The city's 4 water systems serve approximately 3,030 residents using surface water.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 30 violations on record, including 7 health-based violations. 6 remain unresolved.
What to know about Mi Wuk Village's water
Mi Wuk Village ranks #324 out of 694 cities in California for water quality, placing it mid-range in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
As a small community water system, Mi Wuk Village may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 6 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Mi Wuk Village, CA water safe to drink?
Mi Wuk Village's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (82.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 4 water systems serve approximately 3,030 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Mi Wuk Village
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Mi Wuk Village's water quality assessment. Grade: B+ (82.4/100).
Contaminants: Revised Total Coliform Rule.
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Federal disaster declaration (FEMA DR-3592). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4683). Flood event — may have impacted local water infrastructure.
Contaminants: Nitrate.
Key contaminant findings
Based on the most recent EPA sampling data for Mi Wuk Village's water supply.
Well within EPA limits.
Violation history
Mi Wuk Village's water system has 30 total violations on record, including 7 health-based violations. 6 remain unresolved. 6 violations were issued in the last 5 years.
Flood & environmental risk
Tuolumne County has experienced 8 federally declared disasters since 1964. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Beardsley Lake.
Where does Mi Wuk Village's water come from?
Mi Wuk Village's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 4 water systems serving approximately 3,030 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Beardsley Lake (lake).
What Mi Wuk Village residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Mi Wuk Village's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Mi Wuk Village's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Flood & disaster history
Tuolumne County has experienced 8 federally declared disasters since 1964. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Mi Wuk Village compares by contaminant
Explore where Mi Wuk Village ranks among all California cities for specific contaminants.
Water source & infrastructure
Where Mi Wuk Village's water comes from
Mi Wuk Village's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by private ownership and serves approximately 3,030 people through 4 water systems.
Water bodies near Mi Wuk Village
Mi Wuk Village is located near 1 notable water body. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Mi Wuk Village
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MI WUK VILLAGE MUT WTR CO | CA5510006 | 2,163 | SW |
| MI WUK HEIGHTS MWC | CA5500060 | 445 | GW |
| SIERRA PARK WATER COMPANY INC. | CA5510016 | 400 | GW |
| SIERRA VILLAGE MOBILE HOME PARK | CA5500353 | 22 | GW |
How Mi Wuk Village compares
Full California rankings →Mi Wuk Village's score of 82.4/100 is above the average of 57/100 among major California cities. It outscores 8 of 10 nearby cities.
Nearby cities
View California rankings →About Mi Wuk Village, CA
Wikipedia →Mi-Wuk Village is a census-designated place (CDP) in Tuolumne County, California, United States. The population was 935 at the 2020 census, down from 941 at the 2010 census. It was named after the Miwok Indians by the real estate developer and promoter Harry Hoeffler in 1955.
Learn more about your water
Guides and resources related to Mi Wuk Village's water quality findings.
Explore water quality across Tuolumne
Frequently asked questions
Is Mi Wuk Village, CA tap water safe to drink?
Mi Wuk Village's water quality earned a grade of B+ (82.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #324 out of 694 cities tested in California.
What contaminants are in Mi Wuk Village's water?
Lead was measured at 0.0 ppb (90th percentile). 30 violations are on record.
How is Mi Wuk Village's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Mi Wuk Village?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Mi Wuk Village's water come from?
Mi Wuk Village's water is sourced from Surface water. The city has 4 water systems serving approximately 3,030 residents.
What health violations has Mi Wuk Village's water system had?
Mi Wuk Village has 7 health-based violations on record. The most recent violation was recorded in April 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 6 violations remain unresolved.
How does Mi Wuk Village's water compare to other cities?
Mi Wuk Village ranks #324 out of 694 cities in California (better than 53% of state cities) and #6984 out of 15744 cities nationally (56th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.