Is Folsom, CA Tap Water Safe to Drink?
Folsom tap water meets federal Safe Drinking Water Act standards but 1 of 2 ZIP codes show detections above EPA health guidelines, primarily for PFOS. A certified filter is recommended for households that want an additional layer of protection.
Where Does Folsom Get Its Water?
Water in Folsom, CA is provided by 3 public water systems: FOLSOM, CITY OF - MAIN, FOLSOM STATE PRISON and ORANGE VALE WATER COMPANY.
How Is Folsom Tap Water Treated?
Treated water is disinfected using chloramines and free chlorine. Treatment includes conventional treatment (coagulation, flocculation, and filtration) and post-ozone biofiltration.
What's in Folsom Tap Water?
The following contaminants were detected most frequently in Folsom public water systems. 1 of 2 ZIP codes showed detections above EPA health guidelines.
| Contaminant | Peak detected | EPA guideline | ZIPs detected | Status |
|---|---|---|---|---|
| PFOS | 0.0068 µg/L | 0.004 µg/L | 1 ZIP | Above guideline |
| lithium | 9 µg/L | — | 0 ZIPs | Within 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 |
Health Risk Profile for Folsom
Based on EPA monitoring data, 1 of 2 ZIP codes in Folsom 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.
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 Folsom Tap Water
Is Folsom tap water safe to drink?
Folsom tap water meets Safe Drinking Water Act requirements but 1 of 2 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 Folsom tap water?
The most commonly detected contaminants in Folsom water systems include: PFOS, lithium, PFTrDA. See the ZIP-level reports for exact measurements and EPA guideline comparisons.
Where does Folsom get its drinking water?
Folsom receives water from 3 public water systems, including FOLSOM, CITY OF - MAIN.
Do I need a water filter in Folsom?
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 Folsom tap water tested?
Public water systems in Folsom 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 2025-08-05.
Tap water reports by ZIP in Folsom
- 95630 - Folsom CCD, Folsom tap water report Some concern
- 95671 - Represa, Folsom tap water report Higher concern
Water utilities serving Folsom, 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.
- FOLSOM, CITY OF - MAINSome concern
- FOLSOM, CITY OF - ASHLANDNo recent federal sampling
Also covers / overlaps with
- Folsom CCD, CA · Township
- Represa, CA · Community