Fluoride in Boulder Creek, CA Drinking Water
Fluoride data for Boulder Creek, California · 8,433 residents · 1 ZIP code
ZipCheckup's reading of Fluoride in Boulder Creek, California: the highest detected level is 485 ppb; the EPA limit is 4.0 mg/L (MCL) / 2.0 mg/L (SMCL). Fluoride carries a moderate health-risk designation.
Recent water testing in Boulder Creek, California has returned Fluoride readings above detection thresholds.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13
Fluoride in Boulder Creek Tap Water
Fluoride has been detected in Boulder Creek, California drinking water at a maximum level of 485 ppm — 121.25x the EPA MCL.
This analysis covers 8,433 residents across 1 ZIP code in Boulder Creek.
Boulder Creek's overall water quality grade is C (65/100).
Is Fluoride in Boulder Creek Water Safe?
Fluoride was detected in Boulder Creek water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis or activated alumina filter can reduce fluoride levels further.
Fluoride Levels by ZIP Code
| ZIP Code | Fluoride Level | EPA Limit | Status |
|---|---|---|---|
| 95006 | 485 ppm | 4.0 mg/L (MCL) / 2.0 mg/L (SMCL) | Exceeds limit |
| 95006 | 263 ppm | 4.0 mg/L (MCL) / 2.0 mg/L (SMCL) | Exceeds limit |
| 95006 | 100 ppm | 4.0 mg/L (MCL) / 2.0 mg/L (SMCL) | Exceeds limit |
| 95006 | 71 ppm | 4.0 mg/L (MCL) / 2.0 mg/L (SMCL) | Exceeds limit |
Average fluoride level across Boulder Creek: 229.75 ppb
Health Effects of Fluoride
- Skeletal fluorosis at levels above 4 mg/L (bone pain, joint stiffness)
- Dental fluorosis in children at levels above 2 mg/L
- At 0.7 mg/L (water fluoridation level), helps prevent tooth decay
- Possible thyroid effects at high chronic exposure
Health risk severity: Moderate. Governed by the National Primary Drinking Water Regulations.
How Fluoride Gets Into Drinking Water
- Intentional water fluoridation (0.7 mg/L target, beneficial)
- Natural deposits in certain rock formations
- Industrial discharge (aluminum, fertilizer production)
- Naturally elevated in some groundwater (especially arid regions)
What to Do About Fluoride in Boulder Creek Water
- Reverse osmosis removes 90%+ of fluoride
- Activated alumina filters are effective for fluoride
- Bone char carbon can reduce fluoride
- Standard activated carbon filters do NOT remove fluoride
Look for filters certified under NSF 58 for fluoride removal.