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Tap water quality report

Tolleson, AZ

EPA monitoring detected 14 contaminants across the 1 water supplier serving Tolleson. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
9,300
people served
14
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Tolleson's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
4400 µg/L 44%
of the EPA limit 10000 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2019
1/1 SYR4
Nitrate-Nitrite
3760 µg/L 38%
of the EPA limit 10000 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2012
1/1 SYR4
Copper
131 µg/L 10%
of the EPA limit 1300 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2018
1/1 SYR4
Lithium
110 µg/L
No EPA limit set
Main supplier: TOLLESON CITY OF · 9,300 people · 2023
1/1 UCMR-5
Fluoride
99.3 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2012
1/1 SYR4
TTHM
70 µg/L 88%
of the EPA limit 80 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
28.8 µg/L 48%
of the EPA limit 60 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2019
1/1 SYR4
Barium
20.7 µg/L 1%
of the EPA limit 2000 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2012
1/1 SYR4
Chromium
4.665 µg/L 4.7%
of the EPA limit 100 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2012
1/1 SYR4
Lead
3.15 µg/L 21%
of the EPA limit 15 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2018
1/1 SYR4
Arsenic
1.285 µg/L 13%
of the EPA limit 10 µg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2012
1/1 SYR4
PFBS
0.0142 µg/L
No EPA limit set
Main supplier: TOLLESON CITY OF · 9,300 people · 2023
1/1 UCMR-5
Pfba
0.0065 µg/L
No EPA limit set
Main supplier: TOLLESON CITY OF · 9,300 people · 2023
1/1 UCMR-5
Lead
0.00066 mg/L 4.4%
of the EPA limit 0.0150 mg/L
Main supplier: TOLLESON CITY OF · 9,300 people · 2024
1/1 LCR
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 95th percentile of the system's samples — 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 Tolleson

SupplierPopulation served
TOLLESON CITY OF 9,300

Frequently asked questions about Tolleson tap water

Is Tolleson tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Tolleson. 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 Tolleson?

1 public water supplier report drinking-water monitoring for Tolleson, Arizona to the EPA. Each is listed above with its population served.

What contaminants are in Tolleson's water?

The contaminants EPA monitoring detected in Tolleson include Nitrate, Nitrate-Nitrite, Copper, Lithium, Fluoride. The full list, with the level at the main supplier 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.