Physical & aggregate · 2025
pH in Phoenix, AZ tap water
Phoenix, AZ's 2025 Consumer Confidence Report shows pH at or above the federal limit (6.5 MCL). Measured value is 1.4× the threshold.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range Sample Results | 6.6–8.8 | 6.5 MCL |
Verbatim from Phoenix, AZ's 2025 Consumer Confidence Report — source document ↗
About pH
A measure of how acidic or basic the water is.
Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.
How Phoenix, AZ compares
5 of the 123 systems measuring pH on The Water Map have it at or above the federal limit:
Nearby systems also reporting pH:
People also ask
+Is there pH in Phoenix, AZ tap water?
Yes — Phoenix, AZ's 2025 Consumer Confidence Report lists pH at 6.6–8.8. Phoenix, AZ's 2025 Consumer Confidence Report shows pH at or above the federal limit (6.5 MCL). Measured value is 1.4× the threshold.
+What's the federal limit for pH in drinking water?
The federal MCL for pH is 6.5 . The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is pH?
A measure of how acidic or basic the water is. Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.
+Which other U.S. cities have pH over the federal limit?
5 of the 123 systems on The Water Map measuring pH report it at or above the federal limit. Examples include High Point, NC, Billings, MT, City of Hemet, CA.
+Where does this pH measurement come from?
This page reproduces the pH entry from the 2025 Consumer Confidence Report published by the Phoenix, AZ water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/az/phoenix/2025/source.