There is no single nationwide permit for produced-water storage. The approvals depend on the state or tribal jurisdiction, whether the water is held in tanks or an impoundment, whether the activity is part of oil-and-gas exploration and production (E&P), and what happens to the water afterward. A surface container may be subject to state oil-and-gas, solid-waste, groundwater, or pollution-control rules even when the water is excluded from federal hazardous-waste regulation.
Before identifying permits, document the location, operator relationship, storage design, volume and duration, fluid composition, nearby waters and groundwater, and planned destination. Storage, discharge, underground injection, stormwater management, and spill prevention are separate regulatory questions.
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The regulatory answer in one view
Produced water is water brought to the surface during oil and gas production. It commonly contains salts, hydrocarbons, treatment chemicals, and naturally occurring constituents, so regulators focus on containment, releases, groundwater protection, and the water’s final disposition.
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| Regulatory pathway | When it matters | What it covers | What it does not authorize |
|---|---|---|---|
| RCRA and state solid-waste rules | The fluid is an E&P waste or is mixed with other wastes. | Waste classification and state controls for storage, handling, closure, and releases. | It is not a blanket permission to store without a state approval or containment controls. |
| Clean Water Act section 402/NPDES | Produced water or contaminated runoff is discharged from a point source to a water of the United States. | Authorized surface-water discharges and applicable stormwater discharges. | It does not authorize mere storage or underground injection. |
| Underground Injection Control (UIC) | Water is sent to a disposal or enhanced-recovery well. | Class II injection wells and related aquifer-exemption decisions. | It is not a permit for a surface tank, pit, or pond. |
| Spill Prevention, Control, and Countermeasure (SPCC) | The facility stores qualifying oil and could reasonably discharge to navigable waters or adjoining shorelines. | A facility-specific spill-prevention plan and related controls. | It does not replace a discharge, waste, or storage permit. |
| State, tribal, and local programs | Always screen these programs; requirements vary substantially. | Oil-and-gas, groundwater, waste, water-resource, construction, fire, and land-use controls. | No national table can supply the applicable state thresholds or application steps. |
Federal rules provide a framework, not a facility-specific permit determination. The responsible state or tribal agency and the applicable EPA region should confirm the final list.
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Start with six facts regulators will ask for
- Jurisdiction: Record the state, county or municipality, tribal status, and whether the site is in Indian Country. EPA and state authority can differ by location.
- Connection to E&P: Explain whether the water comes directly from oil-and-gas exploration, development, production, or an associated recycling operation. Storage for another industrial or commercial use may follow a different rule set.
- Container type: Identify aboveground or underground tanks, lined containments, closed vessels, or open impoundments. Include liners, secondary containment, leak detection, freeboard, and inspection features if already designed.
- Quantity and duration: State maximum and average volume, turnover rate, and how long water may remain onsite. National sources do not establish one universal storage threshold.
- Fluid characterization: Describe salinity, hydrocarbons, additives, naturally occurring constituents, and any co-stored material. Unrelated wastes can change the regulatory analysis.
- Destination: Specify whether the water will be reused in production, treated for another use, discharged to surface water, hauled away, or injected underground.
These facts should appear in the permit strategy, engineering package, spill plan, and operating procedures. A change in destination or a change from a closed tank to an open impoundment can create a new approval requirement.
RCRA: what the oil-and-gas exclusion does and does not do
The narrow Subtitle C exclusion
Federal regulation 40 CFR 261.4(b)(5) excludes produced waters and other wastes associated with oil-and-gas exploration, development, or production from RCRA Subtitle C hazardous-waste regulation. EPA identifies produced waters, drilling fluids, and related E&P wastes as examples covered by this provision.
The exclusion is tied to the waste’s origin and association with E&P. It is not a blanket exemption for everything found at an oilfield. Spent solvents, discarded chemicals, laboratory waste, and other unrelated materials do not become excluded merely because they are stored at the same facility.
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EPA explains that many E&P wastes are outside Subtitle C but generally remain subject to RCRA Subtitle D and applicable state requirements. A tank or pit may therefore need state approval, operating conditions, inspection, closure, groundwater protection, or financial-assurance measures even when a federal hazardous-waste permit is not required for the produced water itself.
Do not describe produced water as “exempt from RCRA” without identifying the precise Subtitle C exclusion and its E&P limitation. Confirm whether any mixed or unrelated waste causes the exclusion to fail, and keep separate streams segregated when required by state rules.
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Surface-water discharge and stormwater are separate screens
When an NPDES permit may be required
Discharging produced water to a water of the United States is different from storing it. A point-source discharge generally requires authorization under Clean Water Act section 402, commonly through the National Pollutant Discharge Elimination System (NPDES). The permitting authority may be EPA or a state with delegated authority, depending on the location and the scope of that delegation.
Texas illustrates why location matters. EPA states that the Texas Commission on Environmental Quality received partial authority on January 15, 2021, for specified produced-water and related oil-and-gas discharges. EPA retains permitting authority and primary enforcement responsibility for facilities discharging in Indian Country, while maintaining oversight elsewhere. This is a bounded example, not a national rule.
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Stormwater exemption limits
EPA describes a limited oil-and-gas stormwater exception for runoff composed entirely of precipitation conveyances and not contaminated by contact with materials or wastes at the site. Runoff that contacts produced water, tanks, loading areas, waste, or contaminated soil may fall outside that exception. Construction or industrial stormwater coverage can then be required.
Design drainage so clean rainwater is separated from process areas where feasible. Document inspections, diversion structures, sampling points, and corrective actions required by the applicable permit or state program.
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Underground injection: a different permit pathway
If the operating plan sends produced water to a disposal or enhanced-recovery well, use the UIC pathway rather than treating an injection approval as a storage permit. EPA identifies Class II wells as wells used for fluids associated with oil and natural-gas production; produced brines are a principal fluid.
A Class II permit addresses the well, injection zone, mechanical integrity, monitoring, and related safeguards. It does not authorize a surface pond or tank while water waits for transport. Surface storage may require separate state or local approvals and spill controls.
If injection would require an aquifer exemption, that is a separate UIC decision. EPA states that injection begins only after the exemption is approved and a UIC permit is granted. Keep the exemption, well permit, transportation arrangements, and interim-storage approvals on separate schedules.
SPCC and release prevention
Screen the facility for the federal SPCC rule whenever it stores qualifying oil and there is a reasonable expectation of discharge to navigable waters or adjoining shorelines. Applicability is facility-specific and turns on the substances stored, total capacity, and site conditions.
Do not assume that every produced-water tank is covered, and do not assume that labeling a tank “produced water” creates an automatic exemption. Have the actual inventory and discharge pathways reviewed under the SPCC rule. Where the rule applies, the plan should address inspections, containment, drainage controls, response procedures, and professional certification or other requirements specified by the rule.
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State, tribal, and local requirements can decide the outcome
New Mexico as an illustration, not a national template
EPA’s November 9, 2018 draft white paper illustrates how one state can divide requirements by use. It describes New Mexico Oil Conservation Division requirements for qualifying oil-and-gas recycling containments. The same paper says an impoundment storing produced water outside oil-and-gas production may require a New Mexico Environment Department groundwater-discharge permit, along with possible water-resource approvals.
That document is a dated draft. Verify current New Mexico statutes, rules, forms, and agency interpretations before relying on its particulars. The example demonstrates the key point: the same-looking pond can follow a different permit path when the operator, purpose, or water source changes.
Other state and local screens
Depending on location, review oil-and-gas conservation rules, solid-waste permits, groundwater-discharge permits, water-rights or water-resource approvals, construction permits, dam or impoundment requirements, fire codes, floodplain rules, and local land-use conditions. Tribal environmental programs may impose requirements in addition to, or instead of, a state program.
Ask the agency whether a permit is required before construction, before receiving the first barrel, or only when the facility changes capacity or use. Obtain written confirmation when an agency determines that no permit is needed.
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Comparing tanks, lined containments, and impoundments
| Storage form | Questions that affect permitting | Controls to verify | National rule? |
|---|---|---|---|
| Aboveground tank or closed vessel | Is it within E&P operations? What is the inventory, secondary containment, and connection to loading or transfer lines? | Overfill prevention, inspection, secondary containment, leak response, and stormwater segregation. | Numeric thresholds and design standards are not stated nationally; check the governing state and permit. |
| Lined containment or recycling cell | Is it an oil-and-gas recycling facility, and does the liner system protect groundwater under the state rule? | Liner specifications, leak detection, freeboard, sampling, inspection, closure, and emergency procedures. | Requirements vary by jurisdiction; no universal liner specification is established here. |
| Open impoundment or pond | Is the water stored for E&P, another industrial use, or later discharge? Could precipitation contact the water? | Groundwater protection, seepage control, freeboard, wildlife and public safety measures, runoff management, and closure. | Permit type and thresholds are state-specific and not stated nationally. |
Choose the design only after the agency confirms the applicable category. A lower-cost container can create a more complex groundwater, stormwater, or closure analysis than a closed system.
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A practical permit-determination workflow
- Draw the site map. Mark tanks, pits, transfer points, drains, wells, wetlands, streams, property boundaries, and stormwater flow.
- Prepare a water and waste inventory. List each stream, source, expected constituents, maximum volume, and whether any unrelated waste is mixed or co-stored.
- Classify the operation. State whether it is E&P, recycling, treatment, commercial storage, or another use, and identify the operator responsible for each step.
- Check the federal pathways. Evaluate the 40 CFR 261.4(b)(5) exclusion, section 402/NPDES discharge questions, UIC requirements for injection, stormwater coverage, and SPCC applicability.
- Contact the state or tribal agencies. Provide the map, design drawings, inventory, destination, and schedule. Ask for the exact program, application, trigger, and preconstruction conditions.
- Screen local approvals. Confirm zoning, building, fire, floodplain, road-access, and emergency-response requirements where applicable.
- Build operating controls. Write inspection frequencies, transfer procedures, sampling, leak response, rain-event actions, recordkeeping, and closure steps into the operating plan.
- Recheck after changes. Reevaluate permits if volume, liner, storage duration, fluid composition, operator, or final destination changes.
Documents to assemble before applying
- Site ownership, jurisdiction, tribal-status, and facility-contact information.
- Scaled site plan showing containment, drainage, nearby waters, groundwater features, and access for emergency vehicles.
- Engineering drawings for tanks, liners, berms, leak detection, overflow protection, and closure.
- Maximum and average storage volumes, turnover estimates, and expected storage duration.
- Fluid characterization and a segregation plan for unrelated wastes.
- Transfer, inspection, sampling, spill-response, stormwater, and maintenance procedures.
- Final-disposition contracts or plans for reuse, treatment, discharge, hauling, or injection.
- Agency correspondence and written determinations, including any statement that a permit is not required.
Common mistakes and how to correct them
“The RCRA exclusion means no permit is needed.”
Correction: Identify the narrow Subtitle C exclusion, then separately evaluate Subtitle D, state waste rules, groundwater protection, and containment requirements.
“A UIC permit covers the waiting tank.”
Correction: Treat the well authorization and surface-storage approval as separate actions with separate operating conditions.
“Any rainwater exemption covers the site.”
Correction: Determine whether runoff contacts produced water, waste, equipment residue, or contaminated soil. If it does, obtain the stormwater coverage or other authorization required by the regulator.
“A state example applies everywhere.”
Correction: Use New Mexico and Texas examples only to illustrate how programs differ. Confirm the current rule in the actual state or tribal jurisdiction.
“A tank label settles SPCC status.”
Correction: Evaluate the stored substances, capacity, and reasonable discharge expectation for the actual facility.
Questions to put to the regulator
- Which agency has jurisdiction over this location and activity?
- Is the storage considered E&P-related, recycling, commercial storage, or another category?
- Does the proposed tank, lined containment, or impoundment require a construction or operating permit?
- Are groundwater-discharge, water-resource, liner, leak-detection, closure, or financial-assurance requirements triggered?
- Would any planned discharge, truck transfer, bypass, or runoff require NPDES or stormwater authorization?
- Does the facility meet SPCC applicability criteria, and who must certify the plan?
- What approvals are needed before construction, first fill, expansion, or a change in final disposition?
The defensible permit list is the one tied to the actual site, design, fluid, and destination. Treat the federal exclusions and permits as separate screens, then obtain current written direction from the responsible state, tribal, or federal authority before construction or operation.
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