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Did you receive a Notice of Violation (NOV)? Contact AQUALIS today to learn how to resolve the issue.

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Wyoming Local Compliance

State of Wyoming

At AQUALIS, we know Wyoming sustainable water compliance standards and manage regulator relations for our clients.

It is our mission to help you become compliant with these stormwater, wastewater and drinking water regulations through inspections, maintenance, repairs and rehabilitation services. As your water compliance provider, we handle the regulatory guidelines specific to Wyoming and ensure that our services meet the highest compliant procedures to keep you in compliance with local regulators.
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Last Updated 03/24/2024

Understanding Wyoming Stormwater Regulations

There is a phase II MS4 general permit to address stormwater runoff from new development and redevelopment projects that “disturb greater than or equal to one acre, including projects less than one acre that are part of a larger common plan of development or sale, and discharge into the small MS4.” The standards apply statewide to regulated MS4s with exception of Wind River Indian Reservation.

“Permit specifies only that permittees must develop, implement, and enforce a program that ensures that controls are in place that would prevent or minimize water quality impacts from development and redevelopment. The MS4 operator is expected to develop procedures, ordinances or other regulatory mechanisms that will require, to the extent allowed by state or local law, that BMPs be appropriately designed and planned, and provide for enforceable operation and maintenance by the owner/operator.”

Need Help Interpreting Requirements?

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Resources

Wyoming DEQ Stormwater Page

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Wyoming Pollutant Discharge Elimination System (WYPDES)

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WYPDES Issued Permits

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Frequently Asked Questions

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.
Stormwater infrastructure affects property value in several ways that are easy to overlook until a transaction is underway.
 
During due diligence: Buyers and lenders increasingly request stormwater inspection reports as part of commercial property transactions. A system with deferred maintenance, unresolved NOVs or missing inspection records can become a negotiating issue or a deal risk.
 
Flooding history: Properties with recurring stormwater problems (parking lot flooding, pond overflows, erosion) carry a documented liability that affects both insurability and perceived value.
 
Remediation costs: Deferred stormwater maintenance compounds over time. A pond that costs a few thousand dollars to maintain annually can require $50,000–$200,000 in dredging or reconstruction if neglected for several years. These costs are often surfaced during appraisals or environmental assessments.
 
Curb appeal and aesthetics: For retail and multifamily properties, a well-maintained stormwater pond or green infrastructure feature is an amenity. An overgrown, silted-up pond signals neglect to tenants and customers alike.

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.

Stormwater systems are designed to manage a specific volume and velocity of water. When they’re not maintained, performance degrades and the consequences can be significant:
 
Regulatory risk: A failed inspection or malfunctioning system can result in a Notice of Violation (NOV), fines and mandated repairs under a regulatory timeline, often more costly than routine maintenance would have been.
 
Property damage: Clogged inlets, deteriorated pipes and overwhelmed ponds lead to flooding, erosion and structural damage to pavement and buildings. Sinkholes caused by failed underground infrastructure are a common and expensive result of deferred maintenance.
 
Environmental liability: Untreated runoff carrying pollutants into waterways can expose property owners to broader environmental enforcement, including from state environmental agencies and the EPA.
 
Permit renewal risk: Many stormwater permits require demonstrated compliance history at renewal. Gaps in maintenance records can complicate or delay renewal.
In most cases, the property owner is legally responsible for maintaining stormwater control facilities on their land and ensuring those systems remain in compliance with applicable permits. For commercial properties with active construction or industrial operations, responsibility may also extend to the site operator or contractor, who must comply with any NPDES permit tied to their activity. If you own or manage property with stormwater infrastructure (detention ponds, bioretention areas, underground systems or drainage structures) compliance is your obligation regardless of whether your tenants are the ones generating runoff.
 
AQUALIS can serve as your compliance partner, handling inspections, maintenance, and regulator communication on your behalf.
Yes—many municipalities offer stormwater fee credits or reductions for property owners who actively manage runoff on-site and reduce the burden on public stormwater infrastructure. Credit programs vary by jurisdiction but commonly recognize:
 
On-site detention or retention: Ponds, underground vaults, and other systems that hold and slowly release stormwater can qualify for volume-based fee reductions.
 
Green infrastructure: Bioretention areas, permeable pavement, green roofs and native landscaping may qualify for additional credits in municipalities that incentivize water quality improvements.
 
Documented maintenance: Some programs require proof of regular inspections and maintenance to retain credits — meaning a lapsed maintenance program can result in losing a credit you’ve held for years.
 
AQUALIS can review your property’s eligibility for local stormwater credit programs and help prepare the documentation required to apply or maintain credits. Savings vary widely by municipality but can offset a meaningful portion of annual fee assessments.

The information on this page is provided for general informational purposes only and is not legal advice. Regulations change frequently — AQUALIS makes no warranty as to the accuracy or completeness of this content, and any reliance on it is at your own risk. Consult a qualified professional or your local regulatory authority to confirm requirements applicable to your specific property.

Services Offered in State of Wyoming and Surrounding Area

retention pond and grass shore

Stormwater Management

AQUALIS provides comprehensive stormwater services across the United States. From inspection and maintenance to repairs and rehabilitations, AQUALIS manages water on your property so you do not have to.
lift station

Wastewater Management

AQUALIS offers sustainable wastewater solutions including inspection, maintenance and repairs.
Three people reviewing plans

Sustainable Water Engineering

AQUALIS provides sustainable engineering services, in states in which we are licensed, from concept through construction, working closely with our clients to identify and deliver their ideal solutions.
storm drain

Monitoring & Reporting

There are multiple requirements and records that need to be kept from your SWPPP to inspections and depending on your industry, stormwater sampling and analysis.
person holding a beaker

Water Quality Testing

AQUALIS offers water quality testing for stormwater, wastewater and drinking water.

Case Studies

CIPP Lining and Structural Pipe Repair in Shelby Crossings, Fla.  

AQUALIS rehabilitated failing stormwater infrastructure at a commercial property in Shelby Crossings, Florida, using CIPP lining and structural pipe repair. Three pipe runs were lined, while two collapsed sections were excavated and replaced to restore the system.

Multiphase Stormwater Infrastructure Rehabilitation in Atl. GA

AQUALIS helped an Atlanta, Georgia property owner rehabilitate aging stormwater infrastructure through a phased approach. The project addressed critical repairs while allowing the owner to plan for future stormwater improvements.

How a Hidden Pipe Failure Created a Sinkhole and Pond Erosion at a Commercial Property in Orange City, Fla. 

A hidden stormwater pipe failure caused a sinkhole and pond erosion at a commercial property in Orange City, Florida. AQUALIS identified the damage through CCTV inspection and completed pipe and pond repairs to restore the stormwater system.

Lift Station Overhaul Restores Critical Sewage Infrastructure Tacoma, Wash.

AQUALIS completed a lift station overhaul for a critical wastewater system in Tacoma, Washington. The project replaced failing pumps, piping and electrical components, restoring reliable sanitary sewer service without disrupting terminal operations.
during construction of a new bridge in fox point, wisconsin

Green Infrastructure Protects Bridges in Fox Point, Wis.

Severe erosion threatened twin bridges spanning a ravine overlooking Lake Michigan. AQUALIS combined green and gray infrastructure to stabilize the slopes and protect critical infrastructure.

Comprehensive Lift Station Overhaul Restores Sanitary Service at Industrial Facility in Mount Vernon, Wash. 

After years of continuous service, an industrial facility's sanitary lift station had reached the end of its serviceable life. AQUALIS executed a full overhaul, replacing the pumps, plumbing, controls and in-well hardware to return the station to reliable, code-compliant operation.
Muffin Monster installation

Sanitary Lift Station Grinder Installation and System Reliability Improvement in Katy, Texas

AQUALIS addressed recurring sanitary lift station failures at a retail facility in Katy, TX, by identifying the upstream solids issue driving repeated emergency callouts. The project included installation of an inline Muffin Monster grinder, controls integration and full site restoration to improve system reliability and reduce reactive maintenance.
cut pipes laying in a parking lot

Parking Lot Sinkhole Leads to Underground Pipeline Reconstruction in Springfield, Va.

A large sinkhole at a commercial property in Springfield, Virginia led to full reconstruction of the site’s underground stormwater detention system. AQUALIS managed the phased demolition, geotechnical evaluation, utility coordination and installation to restore long-term stability and performance.
new catch basin

Manhole Root Intrusion Repair and System Assessment in Miami, Fla.

Sediment buildup, buried structures and root intrusion prompted a Miami shopping center to partner with AQUALIS to inspect, clean and restore key components of its stormwater system
uv light entering pipe

How Stormwater Pipe Inspection & UV Rehabilitation Restored Flow in New Bern, N.C.

A facility relies on an underground stormwater system to move runoff to a nearby retention basin. A 36-inch pipe plays a key role, but concerns emerged as flooding occurred during heavier rainfall.
new riprap for a pond

Facility Pond Shoreline Stabilization Addresses Erosion in Findlay, Ohio

Years of erosion driven by fluctuating pond levels and site runoff led to shoreline damage across this distribution property. AQUALIS implemented targeted repairs to stabilize the pond and restore stormwater control.
retention pond

Fixing Pond Erosion to Restore and Improve Stormwater Function in Mebane, N.C.

The customer requested maintenance of stormwater management principles located on the property. Lack of routine preventive maintenance had caused overgrowth, leading to insufficient stormwater systems.

Did you receive an NOV? Have an urgent need? We can help.

Notices of Violation (NOVs) or Corrective Notices should be taken seriously. Contact AQUALIS today to learn how to resolve the issue and comply with regulations.

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