92352
Lake Arrowhead, CA
San Bernardino County · Riverside-San Bernardino-Ontario, CA metro area
LAKE ARROWHEAD CSD

Is tap water in Twin Peaks (92352) safe to drink?

Higher concern
Last tested: December 2024
Source: Official EPA UCMR5 federal monitoring data. Last tested December 2024.
Township:
  • Lake Arrowhead CCD, CA
Neighborhoods:
  • Blue Jay
  • North Shore
  • Agua Fria
  • Meadowbrook Woods
  • Crest Park
  • Cedar Glen

The short answer for Twin Peaks (92352)

Lake Arrowhead tap water has 9 contaminants above EPA guidelines, including PFOA at 2.8× the limit (tested July 2024). See the full compound-by-compound breakdown and filter recommendations.

The health risk for Lake Arrowhead

PFAS ('forever chemicals') have been detected above EPA limits in this water system's most recent tests. These synthetic chemicals do not break down in the body and are linked to a range of health effects. A certified filter is strongly recommended.
  • lithium, PFHpA, PFOA, PFOS, PFPeA above limit.
PFOA concentration (µg/L) July 2024
0 µg/L 0.004 µg/L 0.02 µg/L
0.011 µg/L
Detected
µg/L
0.004 µg/L
EPA limit
guideline
175% above limit
Comparison
vs. guideline
EPA limit: 0.004 µg/L | Your water: 0.011 µg/L
Certified Filters for Lake Arrowhead Tap Water

PFOA (a PFAS 'forever chemical') was detected above EPA limits. These filters are independently certified to reduce common drinking-water contaminants.

Water filter recommendation for Lake Arrowhead tap water: Epic Pure XP Water Filter Pitcher
Pitcher filter
Epic Pure XP Water Filter Pitcher
NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.
NSF/ANSI 42, 53, 401 & P473Removes 99.99% PFASMade in USABPA-free
Best for renters or quick setup. No installation needed.
Get the Epic Pure XP →
Most elevated compounds
Compound Measurement EPA Limit Comparison
PFOA
Tested: July 2024 · Cedar Glen TP		 0.011 µg/L 0.004 µg/L 175% above limit
PFOA
Tested: November 2023 · Bernina TP		 0.010 µg/L 0.004 µg/L 145% above limit
PFHpA
Tested: November 2023 · Bernina TP		 0.005 µg/L 0.003 µg/L 57% above limit
PFHpA
Tested: July 2024 · Cedar Glen TP		 0.004 µg/L 0.003 µg/L 47% above limit
lithium
Tested: September 2024 · Well Treatment		 13.000 µg/L 10 µg/L 30% above limit
View all tested compounds

Bernina TP · Tested: November 2023

Compound Measurement EPA Limit Comparison
PFOA 0.010 µg/L 0.004 µg/L 145% above limit
PFHpA 0.005 µg/L 0.003 µg/L 57% above limit
PFOS 0.005 µg/L 0.004 µg/L 20% above limit
PFPeA 0.004 µg/L 0.003 µg/L 20% above limit
PFHxA 0.005 µg/L 3 µg/L 0.2% of limit
lithium <9.000 µg/L 10 µg/L Below limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Cedar Glen TP · Tested: Multiple dates

Compound Measurement EPA Limit Comparison
PFOA 0.011 µg/L 0.004 µg/L 175% above limit
PFHpA 0.004 µg/L 0.003 µg/L 47% above limit
PFOS 0.005 µg/L 0.004 µg/L 25% above limit
PFPeA 0.004 µg/L 0.003 µg/L 23% above limit
PFHxA 0.005 µg/L 3 µg/L 0.2% of limit
lithium <9.000 µg/L 10 µg/L Below limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Well Treatment · Tested: September 2024

Compound Measurement EPA Limit Comparison
lithium 13.000 µg/L 10 µg/L 30% above limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFHxA <0.003 µg/L 3 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFOA <0.004 µg/L 0.004 µg/L Below limit
PFOS <0.004 µg/L 0.004 µg/L Below limit
PFPeA <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Connection to CLAWA · Tested: December 2024

Compound Measurement EPA Limit Comparison
lithium <9.000 µg/L 10 µg/L Below limit
PFHxS <0.003 µg/L 0.004 µg/L Below limit
HFPO-DA <0.005 µg/L 0.01 µg/L Below limit
PFNA <0.004 µg/L 0.01 µg/L Below limit
PFHxA <0.003 µg/L 3 µg/L Below limit
PFBA <0.005 µg/L 6 µg/L Below limit
11Cl-PF3OUdS <0.005 µg/L 0.005 µg/L Below limit
4:2 FTS <0.003 µg/L 0.003 µg/L Below limit
6:2 FTS <0.005 µg/L 0.005 µg/L Below limit
8:2 FTS <0.005 µg/L 0.005 µg/L Below limit
9Cl-PF3ONS <0.002 µg/L 0.002 µg/L Below limit
ADONA <0.003 µg/L 0.003 µg/L Below limit
PFBS <0.003 µg/L 0.003 µg/L Below limit
PFDA <0.003 µg/L 0.003 µg/L Below limit
PFDoA <0.003 µg/L 0.003 µg/L Below limit
PFHpA <0.003 µg/L 0.003 µg/L Below limit
PFHpS <0.003 µg/L 0.003 µg/L Below limit
PFOA <0.004 µg/L 0.004 µg/L Below limit
PFOS <0.004 µg/L 0.004 µg/L Below limit
PFPeA <0.003 µg/L 0.003 µg/L Below limit
PFTrDA <0.007 µg/L 0.007 µg/L Below limit
PFUnA <0.002 µg/L 0.002 µg/L Below limit

Water utilities serving ZIP 92352

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.

Frequently Asked Questions about ZIP 92352 Tap Water

What contaminants are above EPA limits in ZIP 92352?

ZIP 92352 has 9 contaminants above EPA health guidelines in the latest available data, including PFOA at 2.8x the EPA guideline. The full table on this page lists every tested compound and its measured level.

Will boiling ZIP 92352 tap water remove PFOA?

No. Boiling does not remove PFAS, and the compounds can actually become more concentrated as water evaporates. To reduce PFAS at home, use a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis).

Do basic pitcher filters remove PFOA?

Most basic pitcher filters are only certified to NSF/ANSI 42 or 53, which do not cover PFAS. Look for a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis) on the spec sheet.

Who provides tap water in ZIP 92352?

Public records identify LAKE ARROWHEAD CSD as a primary water system associated with ZIP 92352. Service boundaries can vary by address, so confirm exact service with the utility.

When was ZIP 92352 tap water last tested?

The most recent test date used in this report is December 2024. EnviroClarity last refreshed this page on 2026-05-04.

Where can I find the official water quality report for ZIP 92352?

Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact LAKE ARROWHEAD CSD or visit their website for the latest official report covering ZIP 92352. The EPA also maintains a national CCR locator.

Primary source EPA UCMR5 (2023-2025)
Guideline source EPA drinking water standard (lithium: 10 µg/L)
Last tested December 2024
Last page update 2026-05-04

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    Nearby ZIP reports

    Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.

    Protect your water in Lake Arrowhead → see certified filters