Across Temecula, California, federal monitoring data has captured Fluoride in water samples at detectable concentrations in the most recent available reporting cycle.

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-04-05

Fluoride in Temecula Tap Water

Fluoride has been detected in Temecula, California drinking water at a maximum level of 10 ppb — below the EPA MCL of 4.0 mg/L (MCL) / 2.0 mg/L (SMCL).

This analysis covers 127,714 residents across 5 ZIP codes in Temecula.

Temecula's overall water quality grade is B (79/100).

Is Fluoride in Temecula Water Safe?

If you live in an affected ZIP code, consider installing a reverse osmosis or activated alumina filter certified under NSF 58 and testing your water independently.

Fluoride Levels by ZIP Code

Average fluoride level across Temecula: 10 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 Temecula Water

1. Reverse osmosis removes 90%+ of fluoride
2. Activated alumina filters are effective for fluoride
3. Bone char carbon can reduce fluoride
4. Standard activated carbon filters do NOT remove fluoride

Look for filters certified under NSF 58 for fluoride removal.

Related

• Fluoride — National Overview
• California Water Quality
• Temecula Water Quality
• Check Your ZIP Code