Is Tubac, AZ Tap Water Safe? Quality & Contaminants

What was found in Tubac'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate-Nitrite	900 µg/L 9% of the EPA limit 10000 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2017 Highest in the city: 7100 µg/L — DESERT PARADISE MHP LLC · 90 people · 2013	5/5	SYR4
Nitrate	1039.5 µg/L 10% of the EPA limit 10000 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2019 Highest in the city: 3800 µg/L — DESERT PARADISE MHP LLC · 90 people · 2019	5/5	SYR4
Fluoride	1780 µg/L 45% of the EPA limit 4000 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2017	5/5	SYR4
Copper	237 µg/L 18% of the EPA limit 1300 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2018	5/5	SYR4
Barium	7.955 µg/L 0.4% of the EPA limit 2000 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2017 Highest in the city: 59 µg/L — DESERT PARADISE MHP LLC · 90 people · 2013	5/5	SYR4
Lead	50.585 µg/L 337% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2018	5/5	SYR4
TTHM	18.74 µg/L 23% of the EPA limit 80 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2019 Highest in the city: 25.25 µg/L — BACA FLOAT WATER COMPANY · 1,090 people · 2019	2/5	SYR4
Combined Uranium	18.1 µg/L 60% of the EPA limit 30 µg/L Highest in the city: TRUJILLO TRAIL DWID · 75 people · 2012	1/5	SYR4
Chromium	1.955 µg/L 2% of the EPA limit 100 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2017 Highest in the city: 16.36 µg/L — TRUJILLO TRAIL DWID · 75 people · 2018	3/5	SYR4
Arsenic	7.6 µg/L 76% of the EPA limit 10 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2019 Highest in the city: 15.75 µg/L — TRUJILLO TRAIL DWID · 75 people · 2019	5/5	SYR4
Total Haloacetic Acids (HAA5)	4.085 µg/L 6.8% of the EPA limit 60 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2019 Highest in the city: 4.475 µg/L — BACA FLOAT WATER COMPANY · 1,090 people · 2019	2/5	SYR4
Gross Alpha, Excl. Radon And U	1.9 pCi/L 13% of the EPA limit 15 pCi/L Highest in the city: TRUJILLO TRAIL DWID · 75 people · 2012	1/5	SYR4
Di(2-ethylhexyl) Phthalate	1.7 µg/L 28% of the EPA limit 6 µg/L Highest in the city: BACA FLOAT WATER COMPANY · 1,090 people · 2019	1/5	SYR4
Pentachlorophenol	1 µg/L 100% of the EPA limit 1 µg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2019	2/5	SYR4
Combined Radium (-226 And -228)	0.4000 pCi/L 8% of the EPA limit 5 pCi/L Highest in the city: TRUJILLO TRAIL DWID · 75 people · 2019	1/5	SYR4
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: EPCOR - TUBAC · 2,076 people · 2024 Highest in the city: 0.0021 mg/L — DESERT PARADISE MHP LLC · 90 people · 2025	5/5	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 Tubac

Supplier	Population served
EPCOR - TUBAC	2,076
BACA FLOAT WATER COMPANY	1,090
AVALON GARDENS WATER SYSTEM	100
DESERT PARADISE MHP LLC	90
TRUJILLO TRAIL DWID	75

Frequently asked questions about Tubac tap water

Is Tubac tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Tubac. 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 Tubac?

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

What contaminants are in Tubac's water?

The contaminants EPA monitoring detected in Tubac include Nitrate-Nitrite, Nitrate, 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.