What was found in Florence'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 | 9970 µg/L 100% of the EPA limit 10000 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 6/7 | SYR4 |
| Nitrate-Nitrite | 9968.5 µg/L 100% of the EPA limit 10000 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 6/7 | SYR4 |
| Fluoride | 967 µg/L 24% of the EPA limit 4000 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2012
Highest in the city: 1395 µg/L — TONTO BASIN WATER - CACTUS FOREST · 613 people · 2018 | 4/7 | SYR4 |
| Copper | 331.5 µg/L 26% of the EPA limit 1300 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2018
Highest in the city: 402 µg/L — ADOC EYMAN UNIT · 3,969 people · 2019 | 6/7 | SYR4 |
| Lithium | 320 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2024 | 3/7 | UCMR-5 |
| Lead | 70.015 µg/L 467% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2018
Highest in the city: 234.49 µg/L — PARK WATER COMPANY INC · 416 people · 2019 | 5/7 | SYR4 |
| Barium | 4.62 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2012
Highest in the city: 95 µg/L — PARK WATER COMPANY INC · 416 people · 2019 | 5/7 | SYR4 |
| TTHM | 20.025 µg/L 25% of the EPA limit 80 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 5/7 | SYR4 |
| Arsenic | 3.56 µg/L 36% of the EPA limit 10 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2012
Highest in the city: 12.16 µg/L — TONTO BASIN WATER - CACTUS FOREST · 613 people · 2019 | 5/7 | SYR4 |
| Dibromochloromethane | 4.865 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 1/7 | SYR4 |
| Bromoform | 4.68 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 2/7 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.175 µg/L 7% of the EPA limit 60 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 2/7 | SYR4 |
| Combined Uranium | 3.874 µg/L 13% of the EPA limit 30 µg/L Highest in the city: ADOC EYMAN UNIT · 3,969 people · 2013 | 1/7 | SYR4 |
| Chromium | 3.56 µg/L 3.6% of the EPA limit 100 µg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2012 | 5/7 | SYR4 |
| Dibromoacetic Acid | 2.63 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 1/7 | SYR4 |
| Combined Radium (-226 And -228) | 1.8 pCi/L 36% of the EPA limit 5 pCi/L Highest in the city: ADOC EYMAN UNIT · 3,969 people · 2013 | 2/7 | SYR4 |
| Bromodichloromethane | 1.75 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2019 | 1/7 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.5 pCi/L 10% of the EPA limit 15 pCi/L Highest in the city: ADOC EYMAN UNIT · 3,969 people · 2013 | 1/7 | SYR4 |
| Selenium | 0.8635 µg/L 1.7% of the EPA limit 50 µg/L Highest in the city: ADOC FLORENCE ASP · 1,001 people · 2017 | 1/7 | SYR4 |
| PFBS | 0.0600 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2024 | 1/7 | UCMR-5 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0160 µg/L 8% of the EPA limit 0.2000 µg/L Highest in the city: ADOC FLORENCE ASP · 1,001 people · 2017 | 1/7 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2024
Highest in the city: 0.0150 mg/L — DESERT GARDENS RV RESORT CO-OP, INC · 532 people · 2024 | 7/7 | LCR |
| Pfba | 0.0090 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2024 | 1/7 | UCMR-5 |
| PFHXS | 0.0070 µg/L No EPA limit set Main supplier: FLORENCE WATER COMPANY · 15,900 people · 2024 | 1/7 | 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 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 Florence
| Supplier | Population served |
|---|---|
| FLORENCE WATER COMPANY | 15,900 |
| ADOC EYMAN UNIT | 3,969 |
| ADOC FLORENCE ASP | 1,001 |
| PINAL COUNTY JUSTICE COMPLEX | 820 |
| TONTO BASIN WATER - CACTUS FOREST | 613 |
| DESERT GARDENS RV RESORT CO-OP, INC | 532 |
| PARK WATER COMPANY INC | 416 |
Frequently asked questions about Florence tap water
Is Florence tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Florence. 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 Florence?
7 public water suppliers report drinking-water monitoring for Florence, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Florence's water?
The contaminants EPA monitoring detected in Florence include Nitrate, Nitrate-Nitrite, Fluoride, Copper, 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.