Non-Compliance
Clean Water Act
WALNUT GROVE
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
-
11925 PARKLAWN DRIVE
ROCKVILLE, MD 20852
View on map ↗ - County
- MONTGOMERY County
- Inspections
- 1 · last Jan 22, 2026
- Total Penalties
- $0
- Registry ID
- 110013740363
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.
6
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 |
|---|---|---|---|---|---|---|
| Solids, total suspended | DMR, Limited - Numeric Violation | 44.38 mg/L | 30.00 | +48% | Aug 2025 | Open |
| Solids, total dissolved | DMR, Limited - Numeric Violation | 850.25 mg/L | 500.00 | +70% | Dec 2024 | Open |
| Solids, total dissolved | DMR, Limited - Numeric Violation | 522.50 mg/L | 500.00 | +5% | Dec 2023 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 13.65 mg/L | 10.00 | +37% | Jan 2023 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 23.04 mg/L | 10.00 | +130% | Dec 2022 | Resolved |
| Solids, total suspended | DMR, Limited - Numeric Violation | 32.80 mg/L | 30.00 | +9% | Dec 2022 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 13.79 mg/L | 10.00 | +38% | Nov 2022 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 12.05 mg/L | 10.00 | +21% | Oct 2022 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 12.01 mg/L | 10.00 | +20% | Sep 2022 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 26.99 mg/L | 10.00 | +170% | Aug 2022 | Resolved |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 31.00 mg/L | 30.00 | +3% | Jul 2022 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 17.69 mg/L | 10.00 | +77% | Jul 2022 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 34.30 mg/L | 10.00 | +243% | May 2022 | Resolved |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 84.74 mg/L | 30.00 | +182% | May 2022 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 108.69 mg/L | 30.00 | +262% | May 2022 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 13.59 mg/L | 10.00 | +36% | Feb 2022 | Resolved |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 59.63 mg/L | 30.00 | +99% | Aug 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Overdue | 59.63 mg/L | 30.00 | +99% | Aug 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Overdue | 21.62 mg/L | 10.00 | +116% | Jun 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 21.62 mg/L | 10.00 | +116% | Jun 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 33.29 mg/L | 30.00 | +11% | Jun 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Overdue | 33.29 mg/L | 30.00 | +11% | Jun 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Overdue | 30.31 mg/L | 10.00 | +203% | May 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 30.31 mg/L | 10.00 | +203% | May 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 32.67 mg/L | 30.00 | +9% | May 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Overdue | 32.67 mg/L | 30.00 | +9% | May 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 15.09 mg/L | 10.00 | +51% | Apr 2021 | Resolved |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 38.00 mg/L | 30.00 | +27% | Apr 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Overdue | 38.00 mg/L | 30.00 | +27% | Apr 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Overdue | 15.09 mg/L | 10.00 | +51% | Apr 2021 | Resolved |
| Solids, total suspended | DMR, Limited - Numeric Violation | 40.22 mg/L | 30.00 | +34% | Mar 2021 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 33.23 mg/L | 30.00 | +11% | Mar 2021 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 13.10 mg/L | 10.00 | +31% | Mar 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 14.15 mg/L | 10.00 | +42% | Feb 2021 | Resolved |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 33.63 mg/L | 30.00 | +12% | Feb 2021 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 32.88 mg/L | 30.00 | +10% | Feb 2021 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 11.03 mg/L | 10.00 | +10% | May 2020 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 10.73 mg/L | 10.00 | +7% | Dec 2019 | Open |
| Nitrogen, total [as N] | DMR, Limited - Overdue | 11.64 mg/L | 10.00 | +16% | Oct 2019 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 11.64 mg/L | 10.00 | +16% | Oct 2019 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 18.49 mg/L | 10.00 | +85% | May 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 35.50 mg/L | 30.00 | +18% | May 2019 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.03 MGD | 0.03 | +6% | Apr 2019 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 11.21 mg/L | 10.00 | +12% | Jan 2019 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.06 MGD | 0.03 | +90% | Jan 2019 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.21 MGD | 0.03 | +557% | Dec 2018 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.04 MGD | 0.03 | +9% | Oct 2018 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.07 MGD | 0.03 | +118% | Sep 2018 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.03 MGD | 0.03 | +5% | Aug 2018 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.04 MGD | 0.03 | +14% | Jun 2018 | Open |
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