What was found in Rockford'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 | 3905 µg/L 39% of the EPA limit 10000 µg/L Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 5748.5 µg/L — BILL-MAR HEIGHTS MHP · 240 people · 2019 | 5/6 | SYR4 |
| Nitrate-Nitrite | 3720 µg/L 37% of the EPA limit 10000 µg/L Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 5650.5 µg/L — BILL-MAR HEIGHTS MHP · 240 people · 2019 | 5/6 | SYR4 |
| Copper | 1500 µg/L 115% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 5/6 | SYR4 |
| Fluoride | 1191 µg/L 30% of the EPA limit 4000 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 6/6 | SYR4 |
| Barium | 345 µg/L 17% of the EPA limit 2000 µg/L Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 619 µg/L — PRAIRIE PATH WATER COMPANY-WILDWOOD · 490 people · 2019 | 6/6 | SYR4 |
| Monobromoacetic Acid | 68.65 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| TTHM | 17.4755 µg/L 22% of the EPA limit 80 µg/L Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 31.3755 µg/L — PRAIRIE ROAD PUMP CORPORATION · 150 people · 2017 | 5/6 | SYR4 |
| Chloroform | 12.28 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 29.0604 µg/L — PRAIRIE ROAD PUMP CORPORATION · 150 people · 2017 | 4/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 24.84 µg/L 41% of the EPA limit 60 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 2/6 | SYR4 |
| cis-1,2-Dichloroethylene | 11 µg/L 16% of the EPA limit 70 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 2/6 | SYR4 |
| Dichloroacetic Acid | 10.2375 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019 | 2/6 | SYR4 |
| Trichloroacetic Acid | 5.108 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 9.85 µg/L — PRAIRIE PATH WATER COMPANY-WILDWOOD · 490 people · 2017 | 2/6 | SYR4 |
| Lead | 8.18 µg/L 55% of the EPA limit 15 µg/L Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 8.28 µg/L — BRADLEY HEIGHTS SUBDIVISION · 82 people · 2018 | 5/6 | SYR4 |
| Arsenic | 7.03 µg/L 70% of the EPA limit 10 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 5/6 | SYR4 |
| Chromium | 5.9 µg/L 5.9% of the EPA limit 100 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| Combined Radium (-226 And -228) | 5 pCi/L 100% of the EPA limit 5 pCi/L Main supplier: ROCKFORD · 147,051 people · 2019 | 6/6 | SYR4 |
| 1,1,1-Trichloroethane | 4.675 µg/L 2.3% of the EPA limit 200 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| Bromodichloromethane | 3.803 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019 | 4/6 | SYR4 |
| Trichloroethylene | 1.7 µg/L 34% of the EPA limit 5 µg/L Main supplier: ROCKFORD · 147,051 people · 2019
Highest in the city: 3.0965 µg/L — BRADLEY HEIGHTS SUBDIVISION · 82 people · 2019 | 2/6 | SYR4 |
| Selenium | 2.77 µg/L 5.5% of the EPA limit 50 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| Tetrachloroethylene | 2.195 µg/L 44% of the EPA limit 5 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| Dibromochloromethane | 2.1185 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019 | 4/6 | SYR4 |
| Bromoform | 1.965 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| Dibromoacetic Acid | 1.395 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| trans-1,2-Dichloroethylene | 1.145 µg/L 1.1% of the EPA limit 100 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| Carbon Tetrachloride | 0.8600 µg/L 17% of the EPA limit 5 µg/L Main supplier: ROCKFORD · 147,051 people · 2019 | 1/6 | SYR4 |
| Lead | 0.0073 mg/L 49% of the EPA limit 0.0150 mg/L Main supplier: ROCKFORD · 147,051 people · 2026
Highest in the city: 0.0118 mg/L — BRADLEY HEIGHTS SUBDIVISION · 82 people · 2026 | 6/6 | LCR |
| PFHXS | 0.0066 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2025 | 1/6 | UCMR-5 |
| Pfpea | 0.0044 µg/L No EPA limit set Main supplier: ROCKFORD · 147,051 people · 2025 | 1/6 | 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 Rockford
| Supplier | Population served |
|---|---|
| ROCKFORD | 147,051 |
| PRAIRIE PATH WATER COMPANY-WILDWOOD | 490 |
| BILL-MAR HEIGHTS MHP | 240 |
| PRAIRIE ROAD PUMP CORPORATION | 150 |
| CLARKS MHP | 90 |
| BRADLEY HEIGHTS SUBDIVISION | 82 |
Frequently asked questions about Rockford tap water
Is Rockford tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Rockford. 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 Rockford?
6 public water suppliers report drinking-water monitoring for Rockford, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Rockford's water?
The contaminants EPA monitoring detected in Rockford include Nitrate, Nitrate-Nitrite, Copper, Fluoride, 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.