Maricopa County · Arizona · EPA SDWIS 2026Q2
Total Trihalomethanes (TTHM) in Tempe water
Total Trihalomethanes (TTHM) detected below the federal limit in Tempe's public supply.
Total Trihalomethanes (TTHM)
Detected
Detected below the federal limit. 2 EPA records on file (most recent 2017).
EPA records reflect the public water system, not your home's plumbing. Health-based goals (EPA MCLG / WHO) are health targets and are often stricter than the federal legal limit (the MCL). A utility appearing on this list does not by itself mean the water is unsafe to drink. The only way to know what is in your specific home is to test your own water.
The health-based goal vs. the legal limit
The federal legal limit (MCL) is the maximum allowed by law. The health-based goal (EPA MCLG / WHO) is a stricter health target — not itself a legal limit.
Health-based goal (EPA MCLG / WHO)
0.15 ppb
Federal legal limit (MCL)
80 ppb
Source: EPA MCL / MCLG; WHO guidelines · 2026
What removes Total Trihalomethanes (TTHM)
Advertising disclosure
The Very Good Water Company is an authorized WaterTech dealer and earns revenue from installations and lead referrals.
Pentair / Pelican · Whole-House Filtration
Pentair Pelican PC600 Whole House Filter
- stages
- 2
- flow gpm
- 8
- media life
- 5yr / 600k gal
Pentair / Pelican · Whole-House Filtration
Pentair Pelican PC1000 Whole House Filter
- stages
- 2
- flow gpm
- 10
- media life
- 5yr / 1M gal
Waterdrop · Reverse Osmosis Systems
Waterdrop G3P800 Tankless RO (800 GPD)
- gpd
- 800
- stages
- 7
- tankless
- true
Aquasana · Whole-House Filtration
Aquasana Rhino Whole House Filter (1,000,000 gal)
- stages
- 4
- flow gpm
- 7
- filter life
- 10yr / 1M gal
GE Appliances (Haier) · Reverse Osmosis Systems
GE GXRV40TBN 5-Stage Reverse Osmosis
- gpd
- 14.76
- stages
- 5
- antimicrobial
- true
A.O. Smith · Reverse Osmosis Systems
A.O. Smith AO-US-RO-4000 4-Stage RO
- gpd
- 50
- stages
- 4
- fluoride pct
- 99
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