What Happens to Your 210E Permit When Your Industrial Tenant Leaves?

What does a 210E authorization actually name?

The parties, the use and the fallback. A 210E is an authorization under 30 TAC Chapter 210, Subchapter E, not a permit; §210.56(j) keeps it separate from the permit rules in Chapters 205 and 305. Under §210.55(b), a Level II application includes, among other items:

• the legal names and addresses of the producer, provider and user;
• the proposed end use and the use site;
• a description of the waste source;
• the primary disposal method used as an alternative to reuse;
• the volume proposed for reuse and how often it is applied.

A departing tenant usually changes something on that list. TCEQ's reclaimed water guidance is direct about it: "The TCEQ must approve any changes to a use that has received prior approval."

Which role did your tenant play?

Sort this out first, because the answers differ. In a mixed-use project, an industrial tenant can sit in one of three places:

1. the reuse user, taking reclaimed water for irrigation or another end use;
2. the industrial waste source, whose wastewater mixes with the development's domestic flow;
3. both at once.

The plant owner is usually the producer either way. The tenant leaving does not change who holds the authorization, but it can change what the authorization describes.

What happens if the tenant was the reuse user?

The water goes to the disposal method the authorization already names, and the use change goes to TCEQ. Under §210.7, reclaimed water moves to a user "on a demand only basis," and the user may refuse delivery at any time. A contract can still bind the user, but the rule assumes demand can stop.

That is why §210.55(b)(7) asks for a primary disposal method in the first place. When the user stops taking water, the plant needs to send it there, not to a pond. Under §210.56(g)(2), "Ponds shall not be used for disposal," and storage must keep two feet of freeboard. Our post on sizing a storage reservoir for a Texas reuse project covers what storage can and cannot absorb.

Then the paperwork. A new user, a smaller reuse area or a different end use is a change to an approved use. For an off-site use or a commingled system, §210.4(e) also lists major changes that need executive director approval, such as a change in the service area boundary or a major change in the intended use. Our post on 210E authorization compliance covers amendments.

What happens if the tenant was the industrial waste source?

The basis for Level II may be gone, so ask TCEQ how it wants the authorization handled. A mixed-use project is usually eligible under §210.53(b)(2), which covers industrial reclaimed water that contains any amount of domestic wastewater. If the only industrial stream stops, what is left is domestic wastewater.

Subchapter E has no section on what happens when the industrial component ends. Two rules frame the answer:

• Under §210.56(a)(1), the commingled stream was already subject to the domestic reclaimed water rules in Subchapters A to C. That includes §210.2(e), which calls for a TPDES permit, a TLAP or a Chapter 321, Subchapter P authorization before construction and operation of the treatment facility.
• Under §210.59(b), the executive director may suspend an authorization when the type of waste or operation does not comply with Chapter 210. A suspension notice sets a deadline for getting authorization under Texas Water Code Chapter 26, and may require an individual permit.

So check what your plant actually holds. A plant that already has a TPDES permit or TLAP is in a very different spot from one that relied on the 210E alone. The effluent also changes when the industrial flow leaves, so the testing in your file may no longer describe the water.

How do you plan for a tenant exit before it happens?

Build the reuse plan so no single tenant holds it up. The structures that hold up best:

• Control the reuse land. On-site use under §210.52 means inside the facility or on contiguous property the producer owns or operates. Common areas, parks and landscaped areas you control do not leave when a tenant does.
• Spread the demand. Several users, or on-site irrigation plus an off-site user, means one exit does not remove all reuse capacity.
• Write real agreements. For off-site use, §210.4(a) already requires a binding agreement covering the user's duties and the provider's right to cut off misuse. Add notice periods and a duty to tell you before demand drops.
• Size the fallback. The primary disposal method should be able to take the flow the departing user took, not just a wet-weather surplus.
• Consider a backup permit. Our post on a backup discharge permit after your 210E is operational covers that path. A TPDES permit is not indefinite, though: under 30 TAC §305.127 its term may not exceed five years.

Before you sign a lease or a reuse agreement, answer each question yes or no. Any no is a gap to close with your engineer:

1. Do you know which tenants are reuse users, which are industrial waste sources, and which are both?
2. Could the primary disposal method take the full flow of your largest reuse user tomorrow?
3. Would losing your only industrial waste source leave the plant without another authorization for its domestic flow?
4. Does every off-site reuse agreement require notice before the user cuts demand?
5. Does your storage plan keep two feet of freeboard without treating a pond as disposal?
6. Do you know who files the change with TCEQ, and how long it took the last time?

What should you do if the tenant has already left?

Route the water to the authorized disposal method, then call TCEQ. Do not send reclaimed water to a use the authorization does not cover, and do not hold it in ponds as disposal.

If water has already gone to an unauthorized use, the clock has started. Under §210.6, the producer and the provider each notify the executive director in writing within five days of learning of a use the approval does not cover. Then work out the amendment, the new user or the new authorization with your engineer and TCEQ.

This is general education on 30 TAC Chapters 210 and 305 as published in October 2026, not advice on a specific authorization. Your authorization may carry its own conditions, and TCEQ decides how a change is handled, so check both with your engineer.

Frequently asked questions

Does TCEQ have to approve a new reuse user?

Yes. TCEQ's guidance says it must approve any change to a use it has already approved, and a new user changes the parties and often the use site.

Can a reuse user stop taking water before its contract ends?

Under §210.7, a user may refuse delivery at any time, though the rule does not change any obligation the user has by contract. Plan the primary disposal method on the assumption that demand can stop.

I own a business park in Williamson County where our only industrial tenant, a food processor, closes next spring. Our plant reuses the combined flow under a 210E. What should I do before they close?

Tell TCEQ early and ask how it wants the authorization handled once only domestic wastewater remains. Check whether the plant holds a TPDES permit or TLAP for its domestic flow, since §210.2(e) applies to commingled water. Line up any new authorization before the closing date.

I manage a Texas mixed-use development, and the farm that took our reclaimed water was just sold. Who has to tell TCEQ, and how fast?

Stop deliveries the new owner has not been approved for, and send the water to your primary disposal method. If water already went to a use the approval does not cover, the producer and provider each give written notice within five days (§210.6).

Related resources

• How Mixed-Use Developments Qualify for 210E Even When 90% of Their Flow Is Residential
• 210E vs. TPDES Discharge Permit: A Side-by-Side Comparison for Developers
• Ongoing Compliance After Permit Approval: What a Developer-Operator Needs to Track
• What Is a 210E Authorization and How Can It Save Your Texas Development Project?

Is your 210E reuse plan one tenant away from a problem?

We map which tenants your authorization depends on, size the fallback and take the changes to TCEQ before a lease ends.

We specialize in:

• 210E and Chapter 210 reuse authorizations
• TCEQ wastewater permitting, including TPDES and TLAP applications
• Reuse area, irrigation and storage design
• Wastewater treatment and reuse system design
• Due diligence for land with an existing system
• Construction administration

Modern Engineering Solutions, McKinney, Texas. Contact: (214) 833-6748 or mod-eng.com