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Tap water quality report

Unknown, AZ

EPA monitoring detected 10 contaminants across the 1 water supplier serving Unknown. 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
50
people served
10
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Unknown'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
1100 µg/L 11%
of the EPA limit 10000 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2019
1/1 SYR4
Nitrate-Nitrite
1094.5 µg/L 11%
of the EPA limit 10000 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2019
1/1 SYR4
Fluoride
559 µg/L 14%
of the EPA limit 4000 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2016
1/1 SYR4
Copper
109.91 µg/L 8.5%
of the EPA limit 1300 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2019
1/1 SYR4
Barium
15.95 µg/L 0.8%
of the EPA limit 2000 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2016
1/1 SYR4
Lead
10.078 µg/L 67%
of the EPA limit 15 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2019
1/1 SYR4
Arsenic
2.775 µg/L 28%
of the EPA limit 10 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2016
1/1 SYR4
Combined Radium (-226 And -228)
1.3 pCi/L 26%
of the EPA limit 5 pCi/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2019
1/1 SYR4
Chromium
1.1 µg/L 1.1%
of the EPA limit 100 µg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 people · 2016
1/1 SYR4
Lead
0.0120 mg/L 80%
of the EPA limit 0.0150 mg/L
Main supplier: WHETSTONE VILLAGE MHP · 50 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 Unknown

SupplierPopulation served
WHETSTONE VILLAGE MHP 50

Frequently asked questions about Unknown tap water

Is Unknown tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Unknown. 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 Unknown?

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

What contaminants are in Unknown's water?

The contaminants EPA monitoring detected in Unknown include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.