What was found in ZIP 50112
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 4900 µg/L 49% of the EPA limit 10000 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| Fluoride | 690 µg/L 17% of the EPA limit 4000 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2015
Highest in the ZIP: 1200 µg/L — GRINNELL WATER DEPARTMENT · 9,564 people · 2013 | 3/3 | SYR4 |
| Copper | 150 µg/L 12% of the EPA limit 1300 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019
Highest in the ZIP: 356 µg/L — GRINNELL WATER DEPARTMENT · 9,564 people · 2019 | 3/3 | SYR4 |
| Lithium | 140 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2025 | 2/3 | UCMR-5 |
| Lead | 111 µg/L 740% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| TTHM | 79.06 µg/L 99% of the EPA limit 80 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| Chloroform | 52.1 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| Barium | 42.99 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2015 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 22.77 µg/L 38% of the EPA limit 60 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019
Highest in the ZIP: 34.8 µg/L — POWESHIEK WATER ASSOCIATION · 13,920 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 20.43 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 12.37 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019
Highest in the ZIP: 18.16 µg/L — POWESHIEK WATER ASSOCIATION · 13,920 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 16.28 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 12.25 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019
Highest in the ZIP: 15.63 µg/L — POWESHIEK WATER ASSOCIATION · 13,920 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 8.435 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 3.515 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019
Highest in the ZIP: 7.9165 µg/L — POWESHIEK WATER ASSOCIATION · 13,920 people · 2019 | 3/3 | SYR4 |
| Bromoform | 5.673 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 4.582 µg/L No EPA limit set Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2019 | 3/3 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2015
Highest in the ZIP: 3.2 µg/L — POWESHIEK WATER ASSOCIATION · 13,920 people · 2013 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 3 pCi/L 60% of the EPA limit 5 pCi/L Highest in the ZIP: GRINNELL WATER DEPARTMENT · 9,564 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: IA REGIONAL UTILITIES ASSOC (WAVERLY) · 37,820 people · 2025
Highest in the ZIP: 0.0031 mg/L — GRINNELL WATER DEPARTMENT · 9,564 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.
Water suppliers serving ZIP 50112
| Supplier | State | Population served |
|---|---|---|
| IA REGIONAL UTILITIES ASSOC (WAVERLY) | IA | 37,820 |
| POWESHIEK WATER ASSOCIATION | IA | 13,920 |
| GRINNELL WATER DEPARTMENT | IA | 9,564 |
Frequently asked questions about ZIP 50112 tap water
Is the tap water in ZIP 50112 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 50112. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 50112?
3 public water suppliers report EPA drinking-water monitoring for ZIP 50112. Each is listed above with its population served.
What contaminants are in ZIP 50112's water?
EPA monitoring detected Nitrate, Fluoride, Copper, Lithium, Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.