Southwest Reg Water District (RED OAK)
Published drinking-water records and contacts for Southwest Reg Water District (RED OAK). System IA6950701. Review sources and dates; not a real-time water assessment.
- System ID
- IA6950701
- State or territory
- IA
- Published population served
- 3500
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 10 — 2003-01-01 – 2024-12-31
- Iowa DNR published PFAS sampling: 12 — 2025-12-03 – 2025-12-03
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.0022 mg/L | 2024-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0017 mg/L | 2023-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.0034 mg/L | 2022-01-01 – 2022-06-30 | 2026Q3 |
| Lead (PB90) | 0.0039 mg/L | 2021-07-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.0048 mg/L | 2018-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0.0038 mg/L | 2015-01-01 – 2017-12-31 | 2026Q3 |
| Lead (PB90) | 0.007 mg/L | 2012-01-01 – 2014-12-31 | 2026Q3 |
| Lead (PB90) | 0.006 mg/L | 2009-01-01 – 2011-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| HFPO-DA | < 2.0 ng/L | 2025-12-03 | WELL MC1 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFBS | < 2.0 ng/L | 2025-12-03 | WELL MC1 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFHxS | < 2.0 ng/L | 2025-12-03 | WELL MC1 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFNA | < 2.0 ng/L | 2025-12-03 | WELL MC1 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFOA | < 2.0 ng/L | 2025-12-03 | WELL MC1 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFOS | < 2.0 ng/L | 2025-12-03 | WELL MC1 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| HFPO-DA | < 2.0 ng/L | 2025-12-03 | WELL MC3 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFBS | < 2.0 ng/L | 2025-12-03 | WELL MC3 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFHxS | < 2.0 ng/L | 2025-12-03 | WELL MC3 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFNA | < 2.0 ng/L | 2025-12-03 | WELL MC3 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFOA | < 2.0 ng/L | 2025-12-03 | WELL MC3 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
| PFOS | < 2.0 ng/L | 2025-12-03 | WELL MC3 AFTER TREATMENT (FINISHED DRINKING WATER) / Iowa DNR published PFAS sampling |
State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.
Download state records with source notes (CSV)
Published compliance history
2 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2026-03-01 – 2026-03-31 | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2019-09-01 – 2019-09-30 | Resolved | No | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
- Iowa DNR published PFAS sampling — last successful check: 2026-10-14
Administrative contact (EPA filing)
Southwest Regional Water District: 712-542-3259
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.