Public utility report
City of Tempe Water Utilities
View the utility's own report (CCR) ↗This page shows information reported for the water system as a whole — not a test from any individual tap. Service lines, building plumbing and timing can affect water in a specific home.
What the reported data shows
Water source
Utility-provided
Surface water (primary source per EPA SDWIS), with groundwater
Total hardness
Utility-provided
avg 193 ppm, range 169 – 569 (avg 11.3, range 9.9 – 33) grains/gallon
Disinfectant
Utility-provided
UV + sodium hypochlorite (free chlorine, ~1 mg/L leaving plants)
What this page can't tell you
- What is in the water at any individual tap
- Whether a specific home's plumbing or service line affects its water
- Any concentration or condition not covered by the reported data
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Sources and methodology
Total hardness — City of Tempe Water Utilities · 2024 Consumer Confidence and Water Quality Report · retrieved July 17, 2026 · reviewed July 17, 2026
· source ↗
Values as printed in Table 7 of the 2024 CCR. Source PDF archived in repo: data/sources/tempe-ccr-2024.pdf
Disinfectant — City of Tempe Water Utilities · 2024 Consumer Confidence and Water Quality Report · retrieved July 17, 2026 · reviewed July 17, 2026
· source ↗
Treatment includes ultraviolet and sodium hypochlorite disinfection per the 2024 CCR.