What was found in Peoria'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 | 8732.5 µg/L 87% of the EPA limit 10000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 3/3 | SYR4 |
| Nitrate | 8483 µg/L 85% of the EPA limit 10000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 3/3 | SYR4 |
| Fluoride | 610 µg/L 15% of the EPA limit 4000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 3/3 | SYR4 |
| Copper | 408.8 µg/L 31% of the EPA limit 1300 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 3/3 | SYR4 |
| Lithium | 162 µg/L No EPA limit set Main supplier: PEORIA CITY OF · 187,676 people · 2025 | 3/3 | UCMR-5 |
| TTHM | 80.51 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 3/3 | SYR4 |
| Barium | 80 µg/L 4% of the EPA limit 2000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 3/3 | SYR4 |
| Lead | 15.29 µg/L 102% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019
Highest in the city: 40.32 µg/L — SUNRISE WATER COMPANY · 6,490 people · 2019 | 3/3 | SYR4 |
| Nitrite | 40 µg/L 4% of the EPA limit 1000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Chromium | 37 µg/L 37% of the EPA limit 100 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 27 µg/L 45% of the EPA limit 60 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 3/3 | SYR4 |
| Arsenic | 7.7 µg/L 77% of the EPA limit 10 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019
Highest in the city: 9.075 µg/L — SUNRISE WATER COMPANY · 6,490 people · 2019 | 3/3 | SYR4 |
| Xylenes, Total | 9.075 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 7.98 µg/L No EPA limit set Highest in the city: SUNRISE WATER COMPANY · 6,490 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 7.87 µg/L No EPA limit set Highest in the city: SUNRISE WATER COMPANY · 6,490 people · 2019 | 1/3 | SYR4 |
| Bromate | 6.78 µg/L 68% of the EPA limit 10 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Chloroform | 6.51 µg/L No EPA limit set Highest in the city: SUNRISE WATER COMPANY · 6,490 people · 2019 | 1/3 | SYR4 |
| Selenium | 5.43 µg/L 11% of the EPA limit 50 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 3.4 µg/L No EPA limit set Highest in the city: SUNRISE WATER COMPANY · 6,490 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 3.22 µg/L 11% of the EPA limit 30 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2015 | 1/3 | SYR4 |
| Trichloroacetic Acid | 3.1 µg/L No EPA limit set Highest in the city: SUNRISE WATER COMPANY · 6,490 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 2.96 µg/L 0.4% of the EPA limit 700 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.51 pCi/L 17% of the EPA limit 15 pCi/L Main supplier: PEORIA CITY OF · 187,676 people · 2016 | 1/3 | SYR4 |
| Bromoform | 2.33 µg/L No EPA limit set Highest in the city: SUNRISE WATER COMPANY · 6,490 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.3 µg/L No EPA limit set Highest in the city: SUNRISE WATER COMPANY · 6,490 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Adipate | 1.3 µg/L 0.3% of the EPA limit 400 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.28 pCi/L 26% of the EPA limit 5 pCi/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 2/3 | SYR4 |
| Carbon Tetrachloride | 1.2 µg/L 24% of the EPA limit 5 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Toluene | 0.9900 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.7000 µg/L 12% of the EPA limit 6 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| Dinoseb | 0.2950 µg/L 4.2% of the EPA limit 7 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.2000 µg/L 0.3% of the EPA limit 70 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0400 µg/L 20% of the EPA limit 0.2000 µg/L Main supplier: PEORIA CITY OF · 187,676 people · 2019 | 1/3 | SYR4 |
| PFBS | 0.0148 µg/L No EPA limit set Main supplier: PEORIA CITY OF · 187,676 people · 2025 | 1/3 | UCMR-5 |
| PFOA | 0.0056 µg/L No EPA limit set Main supplier: PEORIA CITY OF · 187,676 people · 2025 | 1/3 | UCMR-5 |
| PFHXS | 0.0037 µg/L No EPA limit set Main supplier: PEORIA CITY OF · 187,676 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: PEORIA CITY OF · 187,676 people · 2025 | 3/3 | 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 Peoria
| Supplier | Population served |
|---|---|
| PEORIA CITY OF | 187,676 |
| SUNRISE WATER COMPANY | 6,490 |
| EPCOR - TIERRA DEL RIO | 4,868 |
Frequently asked questions about Peoria tap water
Is Peoria tap water safe to drink?
EPA testing detected 37 contaminants in the water serving Peoria. 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 Peoria?
3 public water suppliers report drinking-water monitoring for Peoria, Arizona to the EPA. Each is listed above with its population served.
What contaminants are in Peoria's water?
The contaminants EPA monitoring detected in Peoria include Nitrate-Nitrite, Nitrate, 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.