Dripping Springs' Sewer Plant Is Nearly Full, and It's Deciding Where New Homes Go

If you're comparing new-construction homes in Dripping Springs this fall, start by asking where each home's wastewater goes. According to Community Impact, the city's main treatment plant has been close to capacity for months, and it isn't accepting most new large residential connections. That one limit explains a lot about the local market. It shapes which subdivisions are moving and which are waiting, why some neighborhoods run their own small treatment plants, and why city wastewater customers saw much larger bills starting in September.

The answer to that question varies from street to street. It also affects your monthly costs and the questions you'll want answered before you sign.

The Plant Behind Most of It

The South Regional Wastewater Reclamation Facility is the city's main treatment plant. Since 2015, the number of wastewater customers the city serves has grown by about 600%. The plant hasn't grown with them yet. It treats about 162,500 gallons per day, and a planned expansion would raise that to 822,500.

City staff told Community Impact in August that the plant can still take some new connections. Large subdivisions are where it stops. Deputy City Administrator Shawn Cox described the line this way:

"It hasn't stopped developments from being able to tie in. It's just we're not going to tie in a large subdivision to it because it can't handle that."

Utilities Director Gray Lahrman added that the city won't connect most new large residential projects unless something special applies, such as an existing agreement. For buyers, that means a subdivision's sewer arrangement often dates back to deals made years ago, long before anyone toured a model home.

How a 2015 Permit Became a 2029 Finish Line

The city saw this coming more than ten years ago. Litigation took up most of the time since.

Lahrman has said the city doesn't plan to discharge into Onion Creek. He described the permit as emergency authority only. What the permit does give the city is the ability to expand the plant without buying more land, storing any treated water it can't use for irrigation. The phase 2 design work will happen while phase 1 is under construction.

That's the full schedule. For anyone buying in the next two to three years, the more useful question is what builders are doing until then.

Four Ways a New Dripping Springs Home Gets Its Wastewater Today

When the city moratorium ran from November 2021 to September 2022, new development had to bring its own wastewater solution. Lifting the moratorium didn't end that. Developers have kept building temporary treatment plants or using pump-and-haul, which means a storage tank that gets emptied regularly and trucked somewhere else for treatment. The city has approved only three pump-and-haul plans in recent years. Projects using these alternatives could add more than 3,800 lots or units to the area.

Public records show what several named communities are doing. The status column comes from the city's most recent posted development status report, which carries no date, so confirm current status with the city before relying on it.

Big Sky Ranch has the most detailed public file. According to the renewal application, the plant can handle a daily average of up to 78,800 gallons. It disperses treated water through drip lines across at least 18.09 acres and isn't authorized to discharge into state waters. The full application can be viewed at the Dripping Springs Community Library, 501 Sportsplex Drive, and on TCEQ's pending land application permits page. Anyone can read a file like that before making an offer, and very few buyers do.

The plats show how much housing depends on these plants. Wild Ridge Phase 1 covers 136 lots, and its Phase 2 final plat has 152 lots and was approved with conditions. Village Grove's Phase 2A final plat has 165 lots, also approved with conditions. When a neighborhood's own plant is still waiting on resubmittal, the homes there are waiting too.

The City Bill Already Moved

Homes connected to city sewer have their own wrinkle. The delay that slowed the plant also raised costs. In May, City Council voted 6-0 to raise wastewater rates for the first time since 2022, and the new rates took effect on September bills.

For the average household, that's an increase of more than 45%. Commercial customers could see increases of $80 to $400 a month depending on usage. The city is also raising its general fund contribution to wastewater from $980,000 to $2.5 million through 2030 to keep customer fees down.

The Hays Free Press reporting explains why the bill went up and why it may not stay put. The legal delay slowed the impact fees that would normally help pay for new infrastructure, so the city used about $2 million from its utility fund in FY 2026 to cover debt service. Council member Geoffrey Tahuahua said the new rates mainly cover operating costs and carry the system through a "hump." A major debt payment begins in 2029, the same year Phase 1 is expected to finish. Cox expects another rate study in two or three years.

So two homes at the same price, a few miles apart, can come with different sewer providers, different rate schedules, and different chances of future increases. This works much like the MUD and PID tax math we covered for Dripping Springs: the cost belongs to the system serving the house more than to the house.

What the County Numbers Say About Your Leverage

Buyers have some room to negotiate right now. Market data for the Dripping Springs ZIP alone wasn't available, so Hays County is the closest current measure. In August 2026, the county's median sale price was $355,000, down 1.4% from a year earlier. There were 1,860 active listings and 5.5 months of inventory, up a full month year over year. Pending sales fell 13.5%.

With that much inventory, buyers can afford to ask detailed questions and wait for written answers. In Dripping Springs, wastewater questions should be on that list, because in a growing share of new subdivisions the builder or a district handles sewer service instead of the city.

Questions to Get Answered in Writing Before an Offer

1. Who provides wastewater to this address? It could be the city, a builder-operated plant, a MUD, a private utility, or an on-site septic system.
2. If the neighborhood has its own plant, is it meant to be temporary? If so, ask what happens when city capacity opens up and who would pay for the switch.
3. What's the provider's current residential rate, and when was it last changed? Compare it with the city's $43.32 base and $5.67 per 1,000 gallons.
4. Is the plant's permit current? You can search TCEQ for renewal filings, like the one Big Sky Ranch submitted in May 2026.
5. For pump-and-haul or on-site systems, who handles maintenance and hauling, and what does it cost?

These are diligence questions, not legal or financial advice. A real estate attorney or the provider itself can confirm the details for a specific property.

FAQ

Can a home be built in Dripping Springs right now if the city plant is near capacity? Yes. The city still accepts some new connections, especially smaller ones and projects with existing agreements. Large subdivisions generally need their own treatment or must wait.

When will the expanded plant open? The city plans to issue the Phase 1 notice to proceed in December 2026 and begin construction in 2027. Lahrman estimates construction will take two and a half to three years, which points to about 2029.

Will Dripping Springs discharge treated wastewater into Onion Creek? The permit allows it, but the city's utilities director has said it would only happen in an emergency.

If you're weighing a new build in Dripping Springs and want to know whose plant serves a particular lot before you fall for the floor plan, Johnny Ronca can help you work through the permits, plats and utility bills that come with it. Let's Connect.