Bonny Doon
CA · CDP

Is Bonny Doon, CA Tap Water Safe to Drink?

Bonny Doon tap water meets federal Safe Drinking Water Act standards but 1 of 1 ZIP code show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

3Water systems
1ZIP codes
100%ZIPs above EPA guideline
Metro areaSanta Cruz-Watsonville, CA
Latest data2025-10-06

Where Does Bonny Doon Get Its Water?

Water in Bonny Doon, CA is provided by 3 public water systems: KOHALA RANCH WATER CO., SANTA CRUZ WATER DEPARTMENT and BRYAN CO. RWS & SWMD #2.

How Is Bonny Doon Tap Water Treated?

Treated water is disinfected using free chlorine and chloramines and on-site generated disinfectant. Treatment includes air stripping, conventional treatment (coagulation, flocculation, and filtration), direct filtration, groundwater disinfection, in-line filtration and post-ozone biofiltration.

What's in Bonny Doon Tap Water?

The following contaminants were detected most frequently in Bonny Doon public water systems. 1 of 1 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 54 µg/L 10 µg/L 1 ZIP Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline
PFBA 0.005 µg/L — 0 ZIPs Within guideline
11Cl-PF3OUdS 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Bonny Doon

Based on EPA monitoring data, 1 of 1 ZIP codes in Bonny Doon 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 Bonny Doon Tap Water

Is Bonny Doon tap water safe to drink?

Bonny Doon tap water meets Safe Drinking Water Act requirements but 1 of 1 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 Bonny Doon tap water?

The most commonly detected contaminants in Bonny Doon water systems include: lithium, PFTrDA, HFPO-DA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Bonny Doon get its drinking water?

Bonny Doon receives water from 3 public water systems, including KOHALA RANCH WATER CO..

Do I need a water filter in Bonny Doon?

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 Bonny Doon tap water tested?

Public water systems in Bonny Doon 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 2025-10-06.

Tap water reports by ZIP in Bonny Doon

Water utilities serving Bonny Doon, 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. Outlines appear when service-area boundary data is available for this ZIP.

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