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Tap water quality report

Tempe, AZ

EPA monitoring detected 29 contaminants across the 2 water suppliers serving Tempe. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
165,175
people served
29
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Tempe's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
8800 µg/L 88%
of the EPA limit 10000 µg/L
 1/2 SYR4
Nitrate-Nitrite
8600 µg/L 86%
of the EPA limit 10000 µg/L
 1/2 SYR4
Copper
1500 µg/L 115%
of the EPA limit, in the worst sample — 1300 µg/L
 1/2 SYR4
Fluoride
810 µg/L 20%
of the EPA limit 4000 µg/L
 1/2 SYR4
Lead
760 µg/L 5067%
of the EPA limit, in the worst sample — 15 µg/L
 1/2 SYR4
Lithium
278 µg/L
No EPA limit set
 1/2 UCMR-5
Barium
140 µg/L 7%
of the EPA limit 2000 µg/L
 1/2 SYR4
TTHM
120 µg/L 150%
of the EPA limit, in the worst sample — 80 µg/L
 1/2 SYR4
Total Haloacetic Acids (HAA5)
44 µg/L 73%
of the EPA limit 60 µg/L
 1/2 SYR4
Chromium
19 µg/L 19%
of the EPA limit 100 µg/L
 1/2 SYR4
Combined Uranium
12.5 µg/L 42%
of the EPA limit 30 µg/L
 1/2 SYR4
Arsenic
11 µg/L 110%
of the EPA limit, in the worst sample — 10 µg/L
 1/2 SYR4
Gross Alpha, Excl. Radon And U
3 pCi/L 20%
of the EPA limit 15 pCi/L
 1/2 SYR4
Selenium
2.1 µg/L 4.2%
of the EPA limit 50 µg/L
 1/2 SYR4
Combined Radium (-226 And -228)
1.2 pCi/L 24%
of the EPA limit 5 pCi/L
 1/2 SYR4
Trichloroethylene
1.02 µg/L 20%
of the EPA limit 5 µg/L
 1/2 SYR4
Thallium, Total
1 µg/L 50%
of the EPA limit 2 µg/L
 1/2 SYR4
Tetrachloroethylene
0.9300 µg/L 19%
of the EPA limit 5 µg/L
 1/2 SYR4
Di(2-ethylhexyl) Phthalate
0.7100 µg/L 12%
of the EPA limit 6 µg/L
 1/2 SYR4
PFHXS
0.0705 µg/L
No EPA limit set
 1/2 UCMR-5
PFOS
0.0558 µg/L
No EPA limit set
 1/2 UCMR-5
PFOA
0.0387 µg/L
No EPA limit set
 1/2 UCMR-5
PFBS
0.0257 µg/L
No EPA limit set
 1/2 UCMR-5
Pfhxa
0.0225 µg/L
No EPA limit set
 1/2 UCMR-5
Pfpea
0.0144 µg/L
No EPA limit set
 1/2 UCMR-5
Lead
0.0110 mg/L 73%
of the EPA limit 0.0150 mg/L
 2/2 LCR
Pfba
0.0099 µg/L
No EPA limit set
 1/2 UCMR-5
Pfpes
0.0080 µg/L
No EPA limit set
 1/2 UCMR-5
Pfhpa
0.0070 µg/L
No EPA limit set
 1/2 UCMR-5
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Tempe

SupplierPopulation served
TEMPE CITY OF 165,000
ADVANCE MHP 175

Frequently asked questions about Tempe tap water

Is Tempe tap water safe to drink?

EPA testing detected 29 contaminants in the water serving Tempe. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Tempe?

2 public water suppliers report drinking-water monitoring for Tempe, Arizona to the EPA. Each is listed above with its population served.

What contaminants are in Tempe's water?

The contaminants EPA monitoring detected in Tempe include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Lead. The full list, with the highest level found and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.