What does TCEQ need before it approves a new public water system for a Texas subdivision?

What must TCEQ decide before construction starts?

That the system is financially stable, technically sound and able to deliver adequate safe water. Construction waits on that finding.

The finding comes first. TCEQ's public water system plan review page says no person may begin construction of a public drinking water supply system until TCEQ makes that determination. The Plan Review Team does the reviews against the Rules and Regulations for Public Water Systems in 30 TAC Chapter 290, Subchapter D.

The rule itself is 30 TAC §290.39. Under §290.39(h)(1), no one may begin construction on a new public water system before receiving written approval of the plans and specifications and, if required, of the business plan.

For a developer, the point is timing. Financial and technical readiness are review criteria, not afterthoughts, so they belong in the schedule before the engineer starts sealing sheets.

Do you have to ask nearby water providers first?

Often, yes. If the new system sits in a city's extraterritorial jurisdiction, or within half a mile of a district, a political subdivision providing water, or another provider's certificated service area, you must show TCEQ you applied to that provider for service.

That is §290.39(c)(1). You show that you made a written application for service and met the provider's application requirements, including fees. A hardship exception to the fees can be requested with supporting documents.

A new system comes after the neighbors say no. Plans, specifications and a business plan go to TCEQ when the rule does not apply, when service is denied, or when the existing provider's cost to serve is not feasible. TCEQ's guidance Evaluating Regionalization for Potential New Public Water Systems (RG-551) covers this step.

Service area rights are a separate question. TCEQ's page directs utility questions to the Public Utility Commission of Texas, which handles certificates of convenience and necessity (CCNs).

What goes into the plan review submittal?

A cover letter, the submittal form, an engineering report, and sealed plans and specifications, all as applicable, prepared under a licensed professional engineer.

• A cover letter stating the intent of the submittal and which components need review.
• The Public Water System Plan Review Submittal Form (TCEQ-10233).
• An engineering report.
• Sealed engineering plans and specifications.

Under §290.39(e)(1), a new system's engineering report covers the problem, the area and population served, the water source, demand, the site, treatment, and delivery capacity and pressure. A general map of the area to be served goes with every new system proposal.

Plans go in at least 30 days before you want approval or comments, and the rule says not to infer that TCEQ will act within that time. Submit flattened PDFs by email to the Plan Review Team, one PDF per document, with no passwords and markups deleted.

What extra documents does a proposed new system add?

Paperwork on who owns it, how it is funded and who it will serve.

New systems carry a longer list. Per the plan review page, proposed new water systems also submit:

• A completed and signed Core Data Form (TCEQ-10400).
• A completed and notarized Financial Ability Form (TCEQ-20841).
• Financial documentation, listed in the New System Checklist.
• A business plan, for community systems only.
• Requests for service, listed in the New System Checklist.

The business plan shows financial, managerial and technical capability, under §290.39(f). For a community system it describes the drinking water systems within two miles, with copies of your written requests for service to each and their responses. Some owners, such as counties and certain retail public utilities, are exempt under §290.39(g).

The forms and the New Proposed Public Water System Checklist are on TCEQ's forms and checklists page. Treat the checklist as the scope of work for the submittal.

What happens during and after construction?

Three more notices. Tell TCEQ before construction starts, when it is complete, and when the system starts serving water.

• Before construction. The design engineer or owner notifies TCEQ in writing, under §290.39(h)(2).
• At completion. The engineer or owner notifies TCEQ in writing and attests that the work substantially matches the approved plans and change orders, under §290.39(h)(3).
• At startup. The owner or responsible official notifies the commission in writing as soon as the system meets the public water system definition, under §290.39(m).

TCEQ's page on establishing a new public water system ties that startup notice to serving at least 15 service connections or 25 individuals. For a well, sanitary control easements or equivalent documents are due before the well goes into service, under §290.39(e)(4).

What changed for distribution submittals in 2026?

Three forms became required on August 1, 2026, when you submit distribution changes for review.

They are the Notification of Political Subdivision (TCEQ-21036), the Non-Significant Change Notification (TCEQ-21037) and the Water System Distribution Plan Review Submittal (TCEQ-21038). Ask your engineer which apply to your phase, especially if the subdivision adds distribution lines to an existing system.

How ready is your subdivision for a TCEQ water system submittal?

Run this check with your engineer before anything is filed.

1. Is a licensed professional engineer directing the plans, specifications and engineering report?
2. Have you checked whether the site is in a city's ETJ or within half a mile of another provider?
3. Do you have written requests for service and the responses?
4. Is a Core Data Form ready for the proposed owner, and does that owner entity exist yet?
5. Is a notarized Financial Ability Form ready, with the financial documentation the checklist lists?
6. If it is a community system, is the business plan written?
7. Do you know who will send the construction, completion and startup notices?

Any no is a gap to close before you file. Our public water system design and Chapter 290 approval work starts from this list.

A note on limits: this article is general education drawn from TCEQ rules and pages as retrieved in October 2026. It does not predict a review outcome or timeline.

Frequently asked questions

Who has to prepare the plans?

A licensed professional engineer must direct their preparation. Engineering documents need seals, signatures and dates under Texas Board of Professional Engineers rules.

Can I email my submittal to TCEQ?

Yes. TCEQ asks for electronic submittal by email to the Plan Review Team. Files larger than 25 MB will not go through by email and must be sent through TCEQ Send instead.

How do I know TCEQ received my plans?

Use the PTR Plan Review Report in the Water Districts Database. It lists plans submitted and under review. When a review is complete, a letter should follow in the mail.

I'm a developer in Texas with land outside any city's service area and no water provider nearby. What should I gather before my engineer submits a new public water system to TCEQ?

Start with the New Proposed Public Water System Checklist: the Core Data Form, the notarized Financial Ability Form, financial documentation and requests for service. For a community system, the business plan still describes the systems within two miles, so send those requests even if you expect a no.

I'm a civil engineer in Texas and our water system design does not meet one TCEQ design standard. Is there a way to ask for relief before we submit?

Yes. TCEQ says a public water system that does not meet a design standard may request an exception by proposing another way to meet the intent of the rules. TCEQ reviews each request to make sure the system will still deliver safe drinking water at adequate pressures.

Related resources

• Public Water System Design and Implementation in Texas
• CCN Territory Disputes in Collin County: What to Check Before Land Crosses a Water Provider Boundary
• How to Conduct a Fire Flow Analysis for a Texas Development or Subdivision
• New Water Main Disinfection and Test Water Discharge: How to Coordinate AWWA Standards with TCEQ Rules

Planning a new public water system for a Texas subdivision?

We prepare the engineering and the submittal so the financial, technical and service pieces are ready together. Talk with an engineer before the plans are sealed.

We specialize in:

• Public water system design
• TCEQ Chapter 290 plan review submittals
• Water system modeling and fire flow analysis
• Utility feasibility studies and due diligence
• Site civil engineering for land development
• Construction administration

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