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Tap water quality report

Rio Rico, AZ

EPA monitoring detected 23 contaminants across the 1 water supplier serving Rio Rico. 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
17,960
people served
23
contaminants found
Arizona rankings Lead in Arizona PFAS in Arizona

What was found in Rio Rico'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
2900 µg/L 29%
of the EPA limit 10000 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Nitrate-Nitrite
2065 µg/L 21%
of the EPA limit 10000 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Copper
210 µg/L 16%
of the EPA limit 1300 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2018
1/1 SYR4
Barium
69.7 µg/L 3.5%
of the EPA limit 2000 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Lithium
20.2 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
Combined Uranium
14.74 µg/L 49%
of the EPA limit 30 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
TTHM
7.6095 µg/L 9.5%
of the EPA limit 80 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Lead
7.25 µg/L 48%
of the EPA limit 15 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2018
1/1 SYR4
Arsenic
5.715 µg/L 57%
of the EPA limit 10 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Xylenes, Total
4.445 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
2.3 µg/L 3.8%
of the EPA limit 60 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Chromium
2.05 µg/L 2.1%
of the EPA limit 100 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
1.975 pCi/L 13%
of the EPA limit 15 pCi/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Dichloromethane
1.4 µg/L 28%
of the EPA limit 5 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
1.24 µg/L 21%
of the EPA limit 6 µg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2019
1/1 SYR4
PFOS
0.0409 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
PFBS
0.0200 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
PFHXS
0.0109 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
PFOA
0.0100 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
Pfba
0.0070 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
Pfhxa
0.0040 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
Pfpea
0.0030 µg/L
No EPA limit set
Main supplier: LIBERTY WATER RIO RICO · 17,960 people · 2024
1/1 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: LIBERTY WATER RIO RICO · 17,960 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 Rio Rico

SupplierPopulation served
LIBERTY WATER RIO RICO 17,960

Frequently asked questions about Rio Rico tap water

Is Rio Rico tap water safe to drink?

EPA testing detected 23 contaminants in the water serving Rio Rico. 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 Rio Rico?

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

What contaminants are in Rio Rico's water?

The contaminants EPA monitoring detected in Rio Rico include Nitrate, Nitrate-Nitrite, Copper, Barium, Lithium. 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.