Aggregate operations play an important role in building and maintaining Texas. From the roads we travel to the commercial developments and communities where we live and work, construction materials such as crushed stone, sand, and gravel support infrastructure across the state.
The industry also operates within a range of environmental regulations. Understanding which requirements apply to a facility, maintaining the necessary registrations and permits, and keeping up with ongoing compliance obligations can help operators avoid disruptions and manage environmental responsibilities throughout the life of an operation.
According to the Texas Commission on Environmental Quality (TCEQ), 999 Aggregate Production Operations (APOs) had active registrations in Texas during fiscal year 2025. TCEQ also reported conducting 1,311 APO investigations during the fiscal year, underscoring the agency’s ongoing oversight of the industry.
For aggregate and concrete operators, understanding the regulatory requirements that apply to their specific operations is an important part of responsible facility management.
What Is an Aggregate Production Operation?
An Aggregate Production Operation, commonly referred to as an APO, is a site where aggregate materials are removed or extracted from the ground. Examples include rock quarries, sand pits, gravel pits, and other commercial extraction operations.
Under Texas regulations, qualifying APOs must register with TCEQ. Registration requirements generally apply to each location where aggregate is extracted, rather than simply to the company operating the site.
An important distinction is that facilities that only process aggregate, without extracting it from the ground, are not required to obtain an APO registration. However, processing facilities may still be subject to other environmental requirements, including applicable air quality and water quality authorizations.
Operators should evaluate the activities taking place at each facility to determine whether APO registration is required and what additional environmental requirements may apply.
Understanding TCEQ APO Registration Requirements
Commercial APOs subject to the registration rules must maintain an active registration with TCEQ. The registration process includes submitting facility information, providing maps that identify the property and disturbed areas, and paying the applicable registration fee.
New operations must register at least 10 business days before beginning aggregate extraction. Registrations must also be renewed annually before the expiration date. Operators should monitor expiration dates and allow sufficient time to complete the renewal process.
Registration information should remain accurate as operations change. For example, changes in ownership or contact information may require updates to the registration. Operators must also cancel an APO registration when regulated extraction activities at the site have ceased.
Maintaining an active APO registration is only one part of environmental compliance. TCEQ specifically notes that APOs may require additional environmental authorizations depending on the activities conducted at the facility.
Operators can review registration guidance and requirements through TCEQ’s Aggregate Production Operations: How to Register webpage.
Environmental Permits and Authorizations Beyond APO Registration
Aggregate facilities can involve multiple activities, including extraction, crushing, screening, material handling, equipment operation, fuel storage, and stormwater management. Each activity may present different environmental considerations.
The permits and authorizations required will depend on the facility’s operations, location, equipment, and potential environmental impacts. Common areas to evaluate include the following.
Air Quality Permitting
Rock and concrete crushing equipment, material handling activities, and other sources of emissions may require air quality authorization through TCEQ.
Depending on the facility and equipment, applicable authorizations may include a permit by rule, a standard permit, or another New Source Review authorization. Temporary and permanent rock and concrete crushers may have different permitting pathways.
Operators should evaluate air permitting requirements before installing new equipment, modifying existing equipment, or changing facility operations. Maintaining compliance may also involve operational limits, recordkeeping, monitoring, and other permit-specific conditions.
Stormwater and Water Quality
Stormwater management is another important consideration for aggregate operations. Industrial activities exposed to stormwater can potentially contribute sediment and other pollutants to nearby waterways if appropriate controls are not maintained.
Certain aggregate operations may be subject to TCEQ’s Multi-Sector General Permit (MSGP) for industrial stormwater or an individual industrial permit. Under the MSGP, some aggregate-related activities fall within Sector J, which covers mineral mining and processing facilities. Applicability depends on the activities conducted at the site and the relevant regulatory criteria.
Facilities subject to industrial stormwater requirements may need to develop and implement a Stormwater Pollution Prevention Plan (SWPPP), conduct inspections, maintain best management practices, and complete required monitoring and reporting.
Water quality requirements can also vary based on location and facility activities. For example, certain sand mining operations in the San Jacinto River watershed may be subject to additional requirements, while facilities in the Edwards Aquifer region may have additional water pollution prevention obligations.
Waste Management and Other Environmental Requirements
Aggregate and concrete facilities may generate used oil, batteries, tires, industrial waste, and other materials that require appropriate handling, storage, and disposal.
Operators should evaluate how waste is generated and managed at their facilities to determine whether additional requirements apply. Fuel storage tanks, wastewater discharges, and other site activities may also trigger separate registration, permitting, or operational obligations.
Because requirements can differ significantly between facilities, a site-specific review is often the most effective way to identify applicable environmental responsibilities.
Preparing for Inspections and Maintaining Compliance
TCEQ conducts routine investigations of active APOs to evaluate compliance with applicable environmental laws and regulations. The agency’s fiscal year 2025 Annual Enforcement Report documented 1,311 APO investigations, including comprehensive investigations, complaint-related activities, reviews of potentially unregistered sites, and follow-up investigations.
Operators should maintain organized environmental records and ensure that employees understand the facility’s applicable requirements. A proactive compliance program may include:
- Permit and registration management: Track APO registration expiration dates, air authorizations, stormwater permits, and other applicable approvals.
- Environmental recordkeeping: Maintain required inspection records, monitoring results, reports, training documentation, and permit-related records.
- Stormwater management: Keep SWPPPs current when required, maintain best management practices, and address deficiencies identified during inspections.
- Air quality compliance: Understand applicable permit conditions, equipment limitations, monitoring requirements, and recordkeeping obligations.
- Operational reviews: Evaluate proposed equipment changes, facility expansions, and modifications to existing processes before implementation.
- Corrective action: Address identified deficiencies and environmental concerns promptly to help prevent recurring issues.
Environmental compliance is not a one-time process. As a facility expands, changes equipment, or modifies its operations, its environmental obligations may also change.
The Value of Proactive Environmental Planning
Environmental considerations are important throughout the life of an aggregate operation, from evaluating a potential property to maintaining an established facility.
Early planning can help operators identify potential permitting requirements, understand site constraints, and account for environmental considerations before construction or operational changes begin. For existing facilities, periodic compliance reviews can help identify gaps, evaluate permit applicability, and keep environmental programs aligned with current operations.
A coordinated approach to environmental management can also help operators address multiple requirements more efficiently. Rather than evaluating air, water, waste, and other environmental responsibilities independently, operators can benefit from understanding how these requirements interact across their facilities.
Environmental Consulting Support for Texas Aggregate and Concrete Operations
ESE Partners provides environmental consulting services to support aggregate and concrete operators throughout Texas. Our team works with clients on environmental requirements associated with site acquisition, permitting, facility operations, and ongoing compliance.
Depending on a facility’s needs, services may include:
- APO registration support and environmental due diligence
- Air quality permitting and compliance assistance
- Stormwater permitting, SWPPP development, and ongoing stormwater management
- Method 9 opacity observations
- Environmental management support and compliance reviews
- TCEQ notice of violation response and regulatory coordination
- Corrective action and remediation services
- Environmental support for facility expansions and operational changes
Each operation has its own regulatory considerations. ESE works to understand the facility, its activities, and its environmental obligations to help clients make informed decisions and manage compliance responsibilities.
