What was found in ZIP 50103
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 | 2500 µg/L 25% of the EPA limit 10000 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 1/2 | SYR4 |
| Fluoride | 546 µg/L 14% of the EPA limit 4000 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2014 | 1/2 | SYR4 |
| Copper | 200 µg/L 15% of the EPA limit 1300 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2017 | 2/2 | SYR4 |
| TTHM | 64.65 µg/L 81% of the EPA limit 80 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019
Highest in the ZIP: 71.165 µg/L — GARDEN GROVE WATER SUPPLY · 179 people · 2019 | 2/2 | SYR4 |
| Chloroform | 54.65 µg/L No EPA limit set Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019
Highest in the ZIP: 61.92 µg/L — GARDEN GROVE WATER SUPPLY · 179 people · 2019 | 2/2 | SYR4 |
| Barium | 50 µg/L 2.5% of the EPA limit 2000 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2014 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 33 µg/L 55% of the EPA limit 60 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019
Highest in the ZIP: 39.85 µg/L — GARDEN GROVE WATER SUPPLY · 179 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 19.65 µg/L No EPA limit set Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019
Highest in the ZIP: 22.8 µg/L — GARDEN GROVE WATER SUPPLY · 179 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 13.65 µg/L No EPA limit set Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 11 µg/L No EPA limit set Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 2.45 µg/L No EPA limit set Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019
Highest in the ZIP: 7.294 µg/L — GARDEN GROVE WATER SUPPLY · 179 people · 2019 | 2/2 | SYR4 |
| Xylenes, Total | 5.45 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 1/2 | SYR4 |
| Ethylbenzene | 4.3 µg/L 0.6% of the EPA limit 700 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 1/2 | SYR4 |
| Lead | 3.3 µg/L 22% of the EPA limit 15 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2017 | 2/2 | SYR4 |
| Dibromochloromethane | 2.7 µg/L No EPA limit set Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.049 µg/L No EPA limit set Highest in the ZIP: GARDEN GROVE WATER SUPPLY · 179 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.5350 µg/L 18% of the EPA limit 3 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 1/2 | SYR4 |
| Simazine | 0.1000 µg/L 2.5% of the EPA limit 4 µg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0093 µg/L No EPA limit set Highest in the ZIP: GARDEN GROVE WATER SUPPLY · 179 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: RATHBUN REGIONAL WATER ASSN (RATHBUN) · 33,000 people · 2023
Highest in the ZIP: 0.0018 mg/L — GARDEN GROVE WATER SUPPLY · 179 people · 2025 | 2/2 | 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 50103
| Supplier | State | Population served |
|---|---|---|
| RATHBUN REGIONAL WATER ASSN (RATHBUN) | IA | 33,000 |
| GARDEN GROVE WATER SUPPLY | IA | 179 |
Frequently asked questions about ZIP 50103 tap water
Is the tap water in ZIP 50103 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 50103. 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 50103?
2 public water suppliers report EPA drinking-water monitoring for ZIP 50103. Each is listed above with its population served.
What contaminants are in ZIP 50103's water?
EPA monitoring detected Nitrate, Fluoride, Copper, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.