Is June Lake, CA Tap Water Safe to Drink?
Graded B, with 4 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
75/100
waterverge.com June Lake, CA — Water Quality Report
June Lake's drinking water received a grade of B (75 out of 100), indicating good water quality. The city's 2 water systems serve approximately 5,573 residents using surface water.
Lead levels were measured at 2.7 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 33 violations on record, including 14 health-based violations. 4 remain unresolved.
What to know about June Lake's water
June Lake ranks #458 out of 694 cities in California for water quality, placing it below average 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.
The system has seen 7 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is June Lake, CA water safe to drink?
June Lake's drinking water has significant quality concerns based on EPA testing data. With a grade of B (75/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 5,573 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for June Lake
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into June Lake's water quality assessment. Grade: B (75/100).
2 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
1 health-based. Contaminants: Surface Water Treatment Rule.
1 health-based. Contaminants: Surface Water Treatment Rule.
Federal disaster declaration (FEMA DR-3592). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3591). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for June Lake's water supply.
Well within EPA limits.
Violation history
June Lake's water system has 33 total violations on record, including 14 health-based violations. 4 remain unresolved. 7 violations were issued in the last 5 years.
Flood & environmental risk
Mono County has experienced 8 federally declared disasters since 1969. 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 Deadman C A Big Springs Nr Crestview, Mf San Joaquin R Nr Mammoth Lakes.
Where does June Lake's water come from?
June Lake's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 2 water systems serving approximately 5,573 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Deadman C A Big Springs Nr Crestview (river), Mf San Joaquin R Nr Mammoth Lakes (river).
What June Lake residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in June Lake'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.
June Lake'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
Mono County has experienced 8 federally declared disasters since 1969. 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. | 2.7 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how June Lake compares by contaminant
Explore where June Lake ranks among all California cities for specific contaminants.
Water source & infrastructure
Where June Lake's water comes from
June Lake'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 local government ownership and serves approximately 5,573 people through 2 water systems.
Water bodies near June Lake
June Lake is located near 2 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving June Lake
| System Name | PWSID | Population | Source |
|---|---|---|---|
| JUNE LAKE PUD - DOWN CANYON | CA2610004 | 2,810 | SW |
| JUNE LAKE PUD VILLAGE | CA2610002 | 2,763 | SW |
How June Lake compares
Full California rankings →June Lake's score of 75/100 is above the average of 57/100 among major California cities. It outscores 7 of 10 nearby cities.
Nearby cities
View California rankings →About June Lake, CA
Learn more about your water
Guides and resources related to June Lake's water quality findings.
Explore water quality across Mono
Frequently asked questions
Is June Lake, CA tap water safe to drink?
June Lake's water quality earned a grade of B (75/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #458 out of 694 cities tested in California.
What contaminants are in June Lake's water?
Lead was measured at 2.7 ppb (90th percentile). 33 violations are on record.
How is June Lake'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 June Lake?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does June Lake's water come from?
June Lake's water is sourced from Surface water. The city has 2 water systems serving approximately 5,573 residents.
What health violations has June Lake's water system had?
June Lake has 14 health-based violations on record. The most recent violation was recorded in October 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 4 violations remain unresolved.
How does June Lake's water compare to other cities?
June Lake ranks #458 out of 694 cities in California (better than 34% of state cities) and #9688 out of 15744 cities nationally (39th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.