Lake Arrowhead
CA · CDP

Is Lake Arrowhead, CA Tap Water Safe to Drink?

Lake Arrowhead tap water meets federal Safe Drinking Water Act standards but 4 of 4 ZIP codes show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

2Water systems
4ZIP codes
100%ZIPs above EPA guideline
Metro areaRiverside-San Bernardino-Ontario, CA
Latest data2024-12-03

Where Does Lake Arrowhead Get Its Water?

Water in Lake Arrowhead, CA is provided by 2 public water systems: LAKE ARROWHEAD CSD and ARROWHEAD VILLAS MUTUAL SERVICE COMPANY.

How Is Lake Arrowhead Tap Water Treated?

Treated water is disinfected using free chlorine. Treatment includes conventional treatment (coagulation, flocculation, and filtration) and ion exchange.

What's in Lake Arrowhead Tap Water?

The following contaminants were detected most frequently in Lake Arrowhead public water systems. 4 of 4 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 13 µg/L 10 µg/L 2 ZIPs Above guideline
PFOA 0.011 µg/L 0.004 µg/L 2 ZIPs Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
8:2 FTS 0.005 µg/L — 0 ZIPs Within guideline
6:2 FTS 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Lake Arrowhead

Based on EPA monitoring data, 4 of 4 ZIP codes in Lake Arrowhead have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Broad-Spectrum Filters for This Water Profile

This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about Lake Arrowhead Tap Water

Is Lake Arrowhead tap water safe to drink?

Lake Arrowhead tap water meets Safe Drinking Water Act requirements but 4 of 4 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in Lake Arrowhead tap water?

The most commonly detected contaminants in Lake Arrowhead water systems include: lithium, PFOA, PFTrDA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Lake Arrowhead get its drinking water?

Lake Arrowhead receives water from 2 public water systems, including LAKE ARROWHEAD CSD.

Do I need a water filter in Lake Arrowhead?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is Lake Arrowhead tap water tested?

Public water systems in Lake Arrowhead are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2024-12-03.

Tap water reports by ZIP in Lake Arrowhead

Water utilities serving Lake Arrowhead, CA

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

Also covers / overlaps with