Rock Island, IL 61201
2 water systems • 39,156 residents
Poor water quality - filtration recommended
Score: 38/100
Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.
Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts
39
Contaminants Detected
193
Violations on Record
21
Health-Based Violations
0
Recent Violations
Grade Breakdown
38 / 100 points
Recommended Water Filters
- ✓Point-of-Use Carbon Filter (NSF-certified for lead)
- ✓Ultraviolet (UV) Purification
- ✓Whole Home Carbon Filter System
Consult a water quality specialist for personalized recommendations.
Rock Island vs IL & National Average
Detected Contaminants
39 contaminants detected across water systems serving this ZIP code
| Contaminant | Category |
|---|---|
| Atrazine | Agricultural |
| Simazine | Agricultural |
| TTHM | Disinfection Byproduct |
| Lead and Copper Rule | Heavy Metal |
| Coliform (TCR) | Microorganism |
| 1,2-DIBROMO-3-CHLOROPROPANE | Other |
| 2,4-D | Other |
| 2,4,5-TP | Other |
| Aldicarb | Other |
| Aldicarb sulfone | Other |
| Aldicarb sulfoxide | Other |
| Benzo(a)pyrene | Other |
| BHC-GAMMA | Other |
| Carbofuran | Other |
| Chloramine | Other |
| Chlordane | Other |
| Consumer Confidence Rule | Other |
| Dalapon | Other |
| Di(2-ethylhexyl) adipate | Other |
| Di(2-ethylhexyl) phthalate | Other |
| Dinoseb | Other |
| Diquat | Other |
| Endothall | Other |
| Endrin | Other |
| ETHYLENE DIBROMIDE | Other |
| Heptachlor | Other |
| Heptachlor epoxide | Other |
| Hexachlorocyclopentadiene | Other |
| LASSO | Other |
| Methoxychlor | Other |
| OXAMYL | Other |
| Pentachlorophenol | Other |
| Picloram | Other |
| Public Notice | Other |
| Surface Water Treatment Rule | Other |
| Total Polychlorinated Biphenyls (PCB) | Other |
| Toxaphene | Other |
| Gross Alpha, Excl. Radon and U | Radiological |
| HEXACHLOROBENZENE | Volatile Organic |
Water System Information
- Systems Serving This ZIP:
- ROCK ISLAND, INDIAN BLUFFS SUBDIVISION
- Population Served:
- 39,156
- Systems With Violations:
- 2 of 2
- Major Violations:
- 107
- Enforcement Actions:
- 188
Frequently Asked Questions
What does the grade mean?
Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.
Is my tap water safe to drink?
Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.
How often is the data updated?
We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.
What filters do you recommend?
Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.