Non-Compliance
Clean Water Act
WALNUT CITY OF STP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
CITY CLERK, CITY HALL
WALNUT, IA 51577
View on map ↗ - County
- POTTAWATTAMIE County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221320
- Inspections
- 1 · last Nov 30, 2021
- Total Penalties
- $0
- Registry ID
- 110010033766
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
11
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.99 MGD | 0.39 | +152% | Jan 2026 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 61.00 mg/L | 40.00 | +53% | Nov 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.99 MGD | 0.39 | +152% | Nov 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.89 MGD | 0.23 | +278% | Sep 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.99 MGD | 0.39 | +152% | Sep 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.92 MGD | 0.23 | +294% | Aug 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.99 MGD | 0.39 | +152% | Aug 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.53 MGD | 0.23 | +128% | Jun 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.99 MGD | 0.39 | +152% | Jun 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.64 MGD | 0.23 | +175% | Apr 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.98 MGD | 0.39 | +149% | Apr 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 21.67 kg/d | 19.07 | +14% | Feb 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 14.97 kg/d | 11.35 | +32% | Feb 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.72 MGD | 0.39 | +83% | Feb 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.62 MGD | 0.23 | +167% | Feb 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.62 MGD | 0.23 | +164% | Jan 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 60.43 kg/d | 35.41 | +71% | Jan 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 37.75 kg/d | 22.25 | +70% | Jan 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.68 MGD | 0.39 | +73% | Jan 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 61.00 MGD | 0.39 | +15,422% | Dec 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 2.03 MGD | 0.23 | +767% | Dec 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.55 MGD | 0.23 | +135% | Nov 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.99 MGD | 0.39 | +152% | Nov 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.52 MGD | 0.39 | +32% | Oct 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.60 MGD | 0.39 | +53% | Sep 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.71 MGD | 0.23 | +203% | Aug 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.98 MGD | 0.39 | +149% | Aug 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.98 MGD | 0.39 | +149% | Jul 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.99 MGD | 0.39 | +152% | May 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.43 MGD | 0.23 | +83% | May 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.60 MGD | 0.23 | +158% | Apr 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.68 MGD | 0.39 | +73% | Apr 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.55 MGD | 0.23 | +135% | Mar 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.69 MGD | 0.39 | +76% | Mar 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 11.69 kg/d | 9.53 | +23% | Mar 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.52 MGD | 0.23 | +121% | Feb 2024 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.58 MGD | 0.39 | +48% | Feb 2024 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 96.00 mg/L | 80.00 | +20% | Aug 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 65.00 mg/L | 40.00 | +63% | Jul 2023 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 114.00 mg/L | 80.00 | +43% | Jul 2023 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 49.28 mg/L | 25.00 | +97% | Jul 2023 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 35.00 mg/L | 25.00 | +40% | Jun 2023 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 51.30 mg/L | 40.00 | +28% | Jun 2023 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.70 MGD | 0.39 | +78% | Dec 2022 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 18.29 kg/d | 9.53 | +92% | Dec 2022 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6.22 kg/d | 5.90 | +5% | Dec 2021 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.24 MGD | 0.23 | +3% | Oct 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 10.96 kg/d | 9.53 | +15% | Oct 2018 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 106.00 MGD | 0.39 | +26,872% | Nov 2017 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 3.64 MGD | 0.23 | +1,455% | Nov 2017 | Open |
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