Stormwater Inspection Checklist

Use this Stormwater Inspection Checklist to cover BMPs, discharge points, pollutant sources, drainage infrastructure, and NPDES permit recordkeeping.

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Stormwater Inspection Checklist



Pre-Inspection Preparation

1. The current stormwater permit (NPDES or MS4) is on file and has been reviewed prior to inspection


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2. The SWPPP or stormwater management plan is available on-site and reflects current site conditions


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3. The previous inspection report has been reviewed and open corrective actions are noted


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4. Weather conditions at the time of inspection are recorded (clear, cloudy, raining, post-storm)


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5. Date and time since last significant rainfall event is recorded


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6. All areas of the site to be inspected are accessible


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Site Perimeter & Drainage Infrastructure

1. All catch basins and storm drain inlets are free of blockages, debris, and excessive sediment


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2. Catch basin sump depth has less than 60% sediment buildup and is at least 6 inches from the outlet pipe


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3. Stormwater conveyance channels and swales are clear of obstructions and flowing freely


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4. Drainage pipes and culverts show no visible signs of damage, collapse, or joint separation


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5. All storm drain inlet markers or labels are legible and accurate


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6. No unauthorized connections or pipes are discharging into the stormwater system


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7. The site perimeter shows no evidence of stormwater bypassing perimeter controls


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Stormwater BMPs — Condition & Function

1. All structural BMPs (detention basins, bioretention cells, infiltration trenches) are free of excessive sediment and functioning as designed


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2. Vegetated BMPs (filter strips, bioswales, rain gardens) have adequate plant cover with no significant bare or eroded areas


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3. Permeable pavement surfaces are free of clogging, sedimentation, and surface ponding


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4. Silt fences are properly anchored, free of tears, and have no evidence of undercutting or overtopping


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5. Check dams and sediment traps are intact and retaining sediment effectively


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6. BMP outlet structures are unobstructed and in good structural condition


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7. Any BMP requiring recent maintenance has had that maintenance completed and documented


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Discharge Points & Receiving Waters

1. All permitted outfall locations have been physically inspected during this visit


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2. No visible oil sheen, foam, discoloration, or floating debris is present at any outfall


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3. No unusual odors are detected at discharge points


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4. Outfall structures are intact with no evidence of erosion or undercutting at the outlet


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5. Receiving water (if accessible) shows no signs of turbidity, discoloration, or debris attributable to site discharges


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6. Any stormwater discharge observed during or after a storm event has been visually assessed and recorded


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Pollutant Source Areas

1. Vehicle and equipment fueling areas are clean, dry, and free of spills or staining


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2. Fuel tanks are in secondary containment and show no signs of leaks or corrosion


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3. Vehicle and equipment maintenance activities are conducted indoors or under cover


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4. Spill kits are present, fully stocked, and accessible in maintenance and fueling areas


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5. Dumpsters and waste containers are covered, leak-free, and positioned away from stormwater inlets


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6. Raw material and chemical storage areas are covered or enclosed to prevent rainfall contact


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7. All hazardous materials and liquid chemicals are in secondary containment


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8. Outdoor storage areas are free of accumulated sediment, debris, and spilled materials


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9. Paved surfaces show no significant accumulation of sediment, debris, or pollutant residue


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10. Washout areas (concrete, paint, equipment) are clearly marked, contained, and show no evidence of overflow


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Non-Stormwater Discharges

1. No non-stormwater discharge (process wastewater, wash water, cooling water) is entering the stormwater system


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2. Vehicle and equipment wash areas drain to a contained collection system, not to the storm drain


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3. Any authorized non-stormwater discharge (fire suppression, potable water flushing, condensate) is within permitted conditions


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4. No evidence of illicit discharge is observed at any drainage point or outfall (e.g., dry-weather flow with signs of contamination)


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5. Dewatering operations, if active, are discharging to an approved location or treatment system


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Record-Keeping & Corrective Actions

1. The stormwater inspection log is current and includes all required inspection fields


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2. All previously identified deficiencies have a documented corrective action with a responsible party and target date


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3. The SWPPP has been updated to reflect any site changes since the last inspection


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4. Maintenance records for all structural BMPs are complete and up to date


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5. Photos of deficiencies observed during this inspection have been captured and attached to the inspection record


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6. Any required regulatory notifications or reports triggered by observations are identified and flagged for follow-up


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Checklist by GoAudits.com – Please note that this checklist is intended as an example. We do not guarantee compliance with the laws applicable to your territory or industry. You should seek professional advice to determine how this checklist should be adapted to your workplace or jurisdiction.

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