Water Quality in 51566 — Red Oak, IA
EPA data for RED OAK WATER SUPPLY
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 51566 in Red Oak, Iowa is served by RED OAK WATER SUPPLY (EPA ID: IA6950075). This system provides water to approximately 5,596 people from groundwater sources.
There are 2 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2024 | Lead | Monitoring | Resolved |
| July 1, 2024 | Lead | Monitoring | Unresolved |
| July 1, 2024 | Lead | Monitoring | Resolved |
| January 1, 2024 | Lead | Monitoring | Unresolved |
| January 1, 2024 | Lead | Monitoring | Resolved |
| January 1, 2024 | Lead | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead | Inorganic | 6 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| RED OAK WATER SUPPLY | IA6950075 | 5,596 | Groundwater |
| SOUTHWEST REG WATER DISTRICT (RED OAK) | IA6950701 | 3,500 | Groundwater |
What You Can Do
- Review your annual Consumer Confidence Report (CCR) — Your utility publishes this each July
- Test your home’s water — Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed — Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Iowa
- 50002 (Adair) — 40 violations
- 50003 (Adel) — 15 violations
- 50005 (Albion) — 3 violations
- 50006 (Alden)
- 50008 (Allerton) — 1 violation
- 50009 (Altoona) — 9 violations
- 50010 (Ames) — 6 violations
- 50020 (Anita) — 1 violation
- 50021 (Ankeny) — 3 violations
- 50022 (Atlantic)
- 50025 (Audubon)
- 50027 (Barnes City) — 4 violations
- 50028 (Baxter) — 13 violations
- 50029 (Bayard) — 7 violations
- 50032 (Berwick)
- 50034 (Blairsburg)
- 50035 (Bondurant)
- 50036 (Boone) — 3 violations
- 50039 (Bouton) — 8 violations
- 50042 (Brayton) — 3 violations
Nearby Water Quality Reports
- 51601 (Shenandoah) — 19 mi
- 50022 (Atlantic) — 29 mi
- 68048 (Plattsmouth, NE) — 36 mi — 1 violation
- 68005 (Bellevue, NE) — 37 mi — 3 violations
- 51501 (Council Bluffs) — 37 mi — 2 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for RED OAK WATER SUPPLY (IA6950075) on EPA.gov.
Frequently Asked Questions
Is the tap water in 51566 safe to drink?
Based on EPA records, the water system serving ZIP code 51566 has only monitoring/reporting violations, which are procedural in nature. However, individual home conditions (old pipes, well water) can affect quality.
Where does 51566’s water come from?
The primary water source for this area is groundwater. RED OAK WATER SUPPLY serves approximately 5,596 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 51566 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 51566. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 51566?
Radon zone data is not available for ZIP code 51566. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.