01The verdict: is Lake Arrowhead Ca 92352 water safe?
Lake Arrowhead Ca 92352's tap water meets most EPA standards but has areas that warrant attention. With a grade of A (90.8/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 1 water system serves approximately 845 residents using surface water (rivers, lakes, or reservoirs).
1 unresolved violation on record
EPA records show an open compliance item for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 0.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓Check back after the next refresh
EPA data updates on a rolling basis; we fold in new samples and violations every month.
Get alerts ↓Lake Arrowhead Ca 92352's drinking water received a grade of A (90.8 out of 100), indicating excellent water quality. The city's 1 water system serves approximately 845 residents using purchased 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 4 violations on record, including 0 health-based violations. 1 remains unresolved.
Lake Arrowhead Ca 92352 ranks #120 out of 690 cities in California for water quality, placing it above 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. As a small community water system, Lake Arrowhead Ca 92352 may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Lake Arrowhead Ca 92352's water
Every contaminant flagged in Lake Arrowhead Ca 92352, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
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 |
Cities ranked by 90th-percentile lead PF PFAS in California
Cities ranked by compounds detected Cu Copper in California
Cities ranked by 90th-percentile copper
03Lake Arrowhead Ca 92352's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 4 violations on record, including 0 health-based violations. 1 remains unresolved.
All ten of the last ten years were clean — no EPA violations recorded for Lake Arrowhead Ca 92352.
▼ Down 0 ppb since 2015. Latest reading: 0 ppb (2025) — 0% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Lake Arrowhead Ca 92352's water comes from
Lake Arrowhead Ca 92352's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Purchased Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Wholesale supplier
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
1 system
1 water system, operated under private ownership.
845 people
Residents served across Lake Arrowhead Ca 92352's service area.
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 845 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| DEER LODGE WATER SYSTEM | CA3600087 | 845 | Purchased Surface Water |
05Pressure on Lake Arrowhead Ca 92352's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Drought
San Bernardino County is in D1 (moderate drought) per the U.S. Drought Monitor (week of Jul 2026). Drought can raise disinfection-byproduct levels and taste/odor issues as utilities draw from lower reservoirs.
06How Lake Arrowhead Ca 92352 compares
Scores for nearby California cities on one line, with the average marked.
dashed line = California average (57/100)
Lake Arrowhead Ca 92352 scores 90.8/100 — above the California average of 57/100. It outscores 9 of 10 nearby cities. Full California rankings →
42.8 / 100FSan Jose, CA
28 / 100BOakland, CA
77.9 / 100FSan Diego, CA
39.7 / 100FSacramento, CA
31.2 / 100ABurlingame, CA
89.2 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Lake Arrowhead Ca 92352's water — not generic advice.
A basic carbon filter still helps
Lake Arrowhead Ca 92352's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Lake Arrowhead Ca 92352 alerts
We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.
All water alerts →Frequently asked questions
Is Lake Arrowhead Ca 92352, CA tap water safe to drink?
Lake Arrowhead Ca 92352's water quality earned a grade of A (90.8/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #120 out of 690 cities tested in California.
What contaminants are in Lake Arrowhead Ca 92352's water?
Lead was measured at 0.0 ppb (90th percentile). 4 violations are on record.
How is Lake Arrowhead Ca 92352'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 Lake Arrowhead Ca 92352?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lake Arrowhead Ca 92352's water come from?
Lake Arrowhead Ca 92352's water is sourced from Purchased surface water. The city has 1 water system serving approximately 845 residents.
How does Lake Arrowhead Ca 92352's water compare to other cities?
Lake Arrowhead Ca 92352 ranks #120 out of 690 cities in California (better than 83% of state cities) and #2045 out of 15382 cities nationally (87th percentile). The grade of A reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lake Arrowhead Ca 92352's small water system affect quality?
Lake Arrowhead Ca 92352's system serves approximately 845 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 4 violations on record.