Is Big Pine, CA Tap Water Safe to Drink?
Graded B, with 11 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
76.3/100
waterverge.com Big Pine, CA — Water Quality Report
Big Pine's drinking water received a grade of B (76.3 out of 100), indicating good water quality. The city's 2 water systems serve approximately 2,017 residents using groundwater.
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 18 violations on record, including 2 health-based violations. 11 remain unresolved.
What to know about Big Pine's water
Big Pine ranks #441 out of 694 cities in California for water quality, placing it below average in the state.
Big Pine relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Big Pine may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Big Pine, CA water safe to drink?
Big Pine's drinking water has significant quality concerns based on EPA testing data. With a grade of B (76.3/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 2,017 residents using groundwater (wells).
Recent water quality updates for Big Pine
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Big Pine's water quality assessment. Grade: B (76.3/100).
Contaminants: LEAD AND COPPER RULE REVISIONS.
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Federal disaster declaration (FEMA DR-4750). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3592). Flood event — may have impacted local water infrastructure.
Contaminants: Consumer Confidence Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Big Pine's water supply.
Well within EPA limits.
Violation history
Big Pine's water system has 18 total violations on record, including 2 health-based violations. 11 remain unresolved. 5 violations were issued in the last 5 years.
Flood & environmental risk
Inyo County has experienced 9 federally declared disasters since 1967. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Big Pine's water come from?
Big Pine's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 2,017 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Big Pine residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Big Pine'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.
Big Pine'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
Inyo County has experienced 9 federally declared disasters since 1967. 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 Big Pine compares by contaminant
Explore where Big Pine ranks among all California cities for specific contaminants.
Water source & infrastructure
Where Big Pine's water comes from
Big Pine's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by private ownership and serves approximately 2,017 people through 2 water systems.
Water systems serving Big Pine
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ROLLING GREEN UTILITIES, INC. | CA1400010 | 1,225 | GW |
| BIG PINE CSD | CA1410006 | 792 | GWP |
How Big Pine compares
Full California rankings →Big Pine's score of 76.3/100 is above the average of 57/100 among major California cities. It outscores 7 of 10 nearby cities.
Nearby cities
View California rankings →About Big Pine, CA
Wikipedia →Big Pine is a census-designated place (CDP) in Inyo County, California, United States. Big Pine is located approximately 15 miles (24 km) south-southeast of Bishop. Its population was 1,875 at the 2020 census, up from 1,756 at the 2010 census. The Big Pine Band of Owens Valley Paiute Shoshone Indians of the Big Pine Reservation bases their tribal headquarters there.
Learn more about your water
Guides and resources related to Big Pine's water quality findings.
Explore water quality across Inyo
Frequently asked questions
Is Big Pine, CA tap water safe to drink?
Big Pine's water quality earned a grade of B (76.3/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #441 out of 694 cities tested in California.
What contaminants are in Big Pine's water?
Lead was measured at 0.0 ppb (90th percentile). 18 violations are on record.
How is Big Pine'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 Big Pine?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Big Pine's water come from?
Big Pine's water is sourced from Groundwater. The city has 2 water systems serving approximately 2,017 residents.
What health violations has Big Pine's water system had?
Big Pine has 2 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 11 violations remain unresolved.
Is Big Pine's groundwater at risk of contamination?
Big Pine uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 18 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Big Pine's water compare to other cities?
Big Pine ranks #441 out of 694 cities in California (better than 36% of state cities) and #9337 out of 15744 cities nationally (41th percentile). The grade of B reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.