Nebraska

Based on AQUALIS’s experience conducting thousands of inspections across the country, the most frequent compliance issues we encounter are:

Overgrown vegetation: Pond banks, swales, and bioretention areas where vegetation has overtaken the designed system, reducing capacity and blocking outflow structures.

Sediment accumulation: Detention ponds lose capacity over time as sediment builds up. Most systems require periodic dredging; many owners don’t realize a pond has lost 30%–50% of its storage until a flood event reveals the problem.

Clogged or damaged inlets and outlets: Debris-blocked catch basins and outlet structures are among the most common findings on inspections and among the easiest to prevent with routine maintenance.

Missing or incomplete records: Inspection reports not filed, maintenance logs not kept or Operation and Maintenance Agreements not recorded with the county register, all common findings that create regulatory exposure even when the physical system is functioning correctly.

Structural deterioration: Cracked or collapsed pipes, eroded embankments and damaged concrete structures that have gone unrepaired past the point of simple fixes.

Illicit discharges: Non-stormwater connections to the drainage system (from wash water, sanitary lines or industrial processes) that violate NPDES permit conditions.

Inspection frequency varies by state, permit type and the type of stormwater infrastructure on your property, but most jurisdictions require at least one inspection per year. Many municipalities require annual inspections conducted by a licensed professional engineer, with a signed report submitted to the local stormwater authority.

Some permits impose more frequent requirements: construction sites under an active NPDES permit are typically inspected before and after significant storm events. Properties in sensitive watersheds or with a history of violations may be subject to additional oversight.

Several warning signs suggest your system may be underperforming or at risk of a compliance failure:

Visible signs on your property: Standing water after rain that takes more than 72 hours to drain; erosion channels around pond banks or drainage structures; sinkholes or depressions near underground infrastructure; discolored or odorous discharge from outfall pipes.

Record gaps: If you can’t locate your last inspection report, don’t know when your pond was last dredged, or aren’t sure whether your Operation and Maintenance Agreement is recorded with the county, those are immediate red flags.

Recent changes nearby: New upstream development, changes to neighboring impervious surfaces or road construction can increase the stormwater load on your system beyond its original design capacity.

Age of infrastructure: Most stormwater infrastructure has a design life of 20–50 years depending on materials and maintenance history. Older systems warrant more frequent inspection.

Pending property transaction: If you’re planning to sell, refinance or bring in a new tenant, it’s worth getting a professional assessment before the other party’s due diligence surfaces issues you weren’t aware of.

If any of these apply to your property, AQUALIS offers assessments to evaluate your system’s condition and compliance status before issues escalate.

Stormwater compliance means meeting the federal, state and local regulations that govern how rainwater and snowmelt runoff is managed on your property. For most commercial, industrial and multifamily properties, compliance involves maintaining on-site stormwater infrastructure (ponds, catch basins, drainage pipes), meeting inspection requirements and keeping records that demonstrate your system is functioning correctly. The specific requirements depend on your state, municipality and the type of permit that applies to your property.