Seasonal Discharge Timing in Texas: How Drought Restrictions and Local Water Rules Change the Plan

Why isn't a discharge plan a one-time decision?

Because the plan rests on conditions that change between phases. A water source, a discharge point and a release method picked during a wet spring can all be wrong by a dry August, or by a week of storms in May.

A single short test rarely notices. A pipeline or subdivision tested in phases over a year will meet more than one season, and each phase should check the plan against what is true that week.

How can drought restrictions cut off your test water?

Through the water supplier's drought contingency plan. Under 30 TAC §288.20, a retail public water supplier's drought contingency plan must set specific criteria for starting and ending each drought response stage. Each stage must name its measures, including curtailment of non-essential water uses.

Construction water is often on the list. The City of Frankston's drought contingency plan (Ordinance No. 021318) is one small-city example:

• at Stage 2, hydrant water is limited to firefighting and public health, safety and welfare, with construction use from designated hydrants allowed only under a special permit from the utilities superintendent;
• at Stage 3, that construction permit is discontinued, and so is line flushing.

Other cities word it differently. Read the plan of the supplier that owns the hydrant you intend to use, and ask whether a hydrant meter permit survives a stage change.

How do you find out what stage a system is in?

Ask the supplier, then check TCEQ's list. Section 288.20 requires a supplier to notify TCEQ's executive director within five business days of starting any mandatory provisions of its plan.

TCEQ publishes the reports as its list of Texas public water systems limiting water use to avoid shortages. The list is self-reported, so treat it as a prompt to call the supplier, not as the final word.

Does rain change where you can put the water?

Yes, if your plan is land application. TCEQ General Permit TXG670000, reissued effective April 5, 2025, allows hydrostatic test water to be land applied under Part III, Section C. Land application may not occur:

• when the ground is frozen, saturated or has standing water;
• during rainfall;
• within 24 hours of a rainfall event of 0.5 inch or more in a 24-hour period.

It also may not cause runoff or ponding, and the permittee must keep vegetation in the application area. A wet week can push a land application release back by days, so the test schedule needs room for it.

What about direct discharge during storms or drought?

The numeric limits do not change with the season, but the risks around them do. TXG670000 requires a discharge to a splash pad, a paved area or another erosion-proof surface, with the rate controlled to prevent flooding and erosion. That is harder when the ditch is already running full.

In drought, a small creek may be nearly dry. The permit requires the permittee to stop discharging whenever the discharge may endanger human health, safety or the environment, and to prevent nuisance conditions. What looked minor in spring can be the whole flow of the creek in August.

Ground conditions shift too. Saturated soil erodes faster, and baked or bare soil may not hold the controls you designed for. Walk the discharge point and its erosion controls again before each release.

Does the storm drain owner need to hear from you each time?

Yes. When the discharge starts inside a municipal separate storm sewer system, TXG670000 requires written notice to the MS4 operator at least 48 hours before discharge, and the same notice to the TCEQ regional office. A city managing a full system after heavy rain may ask you to wait, so send the notice early enough to adjust.

The choice between the storm drain and the sanitary sewer can also flip with the season. A sewer utility may accept water in a dry month that it turns away when inflow is high.

What are the alternatives when the usual path closes?

Reuse the water, haul it, or send it to a treatment plant. The permit's 2025 fact sheet lists practices that need no hydrostatic test coverage, including recycling with no discharge, hauling to an authorized disposal facility and discharging to a publicly owned treatment works. Each takes lead time: storage, trucks or the plant's own approval.

That lead time is the reason to decide in the planning phase. The test water reuse option in particular needs tanks on site before the first test, not after the creek runs dry.

What should a phased test program check before each event?

Run the same short list a week or two before every test:

1. The water supplier's current drought stage and whether your hydrant or meter permit still stands.
2. The 48-hour notices to the TCEQ regional office and, where it applies, the MS4 operator.
3. The forecast and recent rainfall, if the plan is land application.
4. The discharge point and receiving channel, walked in their current condition.
5. A fallback: storage, hauling or a sewer connection, already arranged.

This post covers TXG670000 and Texas drought planning rules as general education. Every supplier's plan and every MS4 has its own terms, and permits and stages change, so confirm with the owners before each phase.

Frequently asked questions

Where can I check a Texas city's current drought stage?

Ask the water supplier directly. TCEQ also posts a self-reported list of public water systems limiting water use, which is a useful first check.

Can a drought stage stop us from using a hydrant for testing?

It can. Drought plans must curtail non-essential uses, and some, like Frankston's, limit construction hydrant use to a special permit at one stage and end it at the next.

How long after rain must we wait to land apply test water?

Under TXG670000, not during rainfall and not within 24 hours of a 0.5-inch or larger rainfall event, and never on frozen, saturated or flooded ground.

I'm a contractor testing a Texas subdivision's water lines in three phases over the next year. The first phase discharged fine in March. What do I need to recheck before the August phase?

Recheck the supplier's drought stage and your hydrant permit, send fresh 48-hour notices, and walk the discharge point and channel in their current condition. If you plan to land apply, check recent rainfall too.

I'm a developer's project manager and the city just moved to a higher drought stage two weeks before our pressure test. What are our options?

Ask the city whether construction water is still allowed and under what permit. If it is not, look at another source, reusing water between test segments, or rescheduling, and decide before the crew mobilizes.

Related resources

• Hydrostatic Test Water: What Texas Developers and Contractors Need to Know Before Discharge
• Hydrostatic Testing Records and the TCEQ Audit Trail: What Contractors Need Before an Inspector Shows Up
• Chlorine Neutralization Before Discharge: The Field Step Contractors Skip Until It Becomes a Compliance Problem
• TPDES General Permit vs. Individual Permit for Construction Discharges: When the Standard Permit Is Not Enough

Planning a test program that runs through more than one season?

We build the water source, discharge route and fallback into the utility plans and specifications, so a drought stage or a wet month does not stop the crew.

We specialize in:

• Water distribution main design
• Testing, disinfection and discharge specifications
• TPDES discharge permitting
• Erosion control and SWPPP design
• Construction administration for utility projects

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