Water quality records for Cranbury, New Jersey show Fluoride detections on file — a finding that places it among the contaminants worth tracking for this area.

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

Fluoride in Cranbury Tap Water

Fluoride has been detected in Cranbury, New Jersey drinking water at a maximum level of 4 ppb — below the EPA MCL of 4.0 mg/L (MCL) / 2.0 mg/L (SMCL).

This analysis covers 12,511 residents across 1 ZIP code in Cranbury.

Cranbury's overall water quality grade is C (55/100).

Is Fluoride in Cranbury Water Safe?

Fluoride was detected in Cranbury 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

Average fluoride level across Cranbury: 4 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 Cranbury 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
• New Jersey Water Quality
• Cranbury Water Quality
• Check Your ZIP Code