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Water & Wastewater Services

Water Division

 The Mission of the City's water division is to provide an ample supply of quality water with exceptional service that exceeds the expectations of our citizens, businesses and visitors of Cibolo. 

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Who makes up your water division?


The City of Cibolo’s Water Division is currently made up of 7 employees, which consists of a Foreman, Crew Leaders, Water Technician’s and a Utility Meter Reader.
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How do we maintain water quality?

Daily testing of chlorine residuals as well as collection of numerous bacteriological samples help ensure the integrity and safety of our distribution system.  We flush dead end mains monthly and regularly monitor water pressure in the distribution system in an effort to further protect our water quality.
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Where does our water come from?

Canyon Regional Water Authorities Water Treatment Plant (WTP) is responsible for providing a safe and consistent supply of drinking water to the citizens of several cities and water supply companies, including City of Cibolo and Green Valley SUD.

The water is supplied from Lake Dunlap and a series of wells located in Wilson County. The city currently has a contract with the CRWA for Approximately 5000 acre feet per year, with the plant rated at 14.4 million gallons per day.

The water is pulled from the lake through an intake structure and pump station, sent to an ultra-filtration process treatment plant, disinfected and pumped to storage tanks. It is then delivered to Cibolo through a series of pipelines into our tanks, a 14+ mile journey. We have a total of 3.75 million gallons in elevated storage and 2 million gallons in ground storage.

The City of Cibolo has an excellent long-range water supply and distribution capacity. As a supplier of drinking water, the city must provide water that meets federal and state standards. As a consumer, you have the right to know if your water meets those standards.
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How do we get the water to your home?

Our water distribution system is made up of pump stations, ground storage tanks, elevated storage tanks, and over 70 miles of water mains. Our smallest diameter water main is two inches, and our largest is 24 inches. In addition, we repair water leaks and respond to calls from customers regarding potential leaks. Aggressively responding to leaks, or potential leaks helps reduce water loss through the system which saves money and resources thereby reducing cost to our customers.

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We are here to serve.

We take pride in providing a safe and reliable supply of water for the citizens of Cibolo. There is a division crew member on call 24 hours a day, seven days a week as well as on all holidays. If you need to report water related issues please call our office at 210-658-9900*1 or after hours or holidays call 210-619-1200 for assistance.
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Wastewater Division

The Mission of the City’s Wastewater Division is to maintain the wastewater collection system in a manner that protects our customers and the environment.

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Who makes up your wastewater division?

The City of Cibolo’s Wastewater Division is currently made up of five employees, which consists of a Foreman, a Crew Leader and three Wastewater Technicians.  A Superintendent oversees the daily operations of both the water and wastewater divisions.

What does the wastewater division do?

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The employees of this division are responsible for operating and maintaining the wastewater collection system.  This system includes, lift stations, force mains, various pumps, manholes, and gravity lines. The wastewater crews clean, maintain, and monitor all of these components of the system. In addition, the crews inspect lines and manholes, with video equipment to search for infiltration/inflow. Reducing infiltration/inflow achieves cost savings in treatment and facilitates a more reliable collection system.
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What is a lift station?

A lift station pumps wastewater uphill and commonly to a point where it can gravity flow downhill again. A lift station is equipped with pumps, wet wells, and control systems the pumps force the wastewater through a pipe, referred to as a force main.  Not all wastewater lines lead to lift stations; some go directly to the wastewater treatment plant because the plant is lower in elevation than the homes it services. This is referred to as gravity flow.  We currently have five lift stations in our collection system and all are monitored on a daily basis.
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Where does the wastewater go?

Wastewater leaves the home/business and enters the “Collection System”. In the collection system it will travel by gravity to a sewer main pipe and will pass through manholes and more piping before connecting to “Interceptor Mains,” which are larger pipes that collect several basin areas to transport towards the Waste Water Treatment Plant (WWTP).  The interceptor mains will transport the wastewater to a “Trunk Line “or a “Main Lift Station”.  In Cibolo’s case, it flows to a lift station where it is “Lifted” and pumped through a force main to the WWTP for treatment.

How is the wastewater treated?

In our area the WWTP is a regional WWTP, as such it treats waste water from Cibolo, Schertz, Randolph AFB, Universal City and others. It is operated by Cibolo Creek Municipal Authority or CCMA.


Wastewater Treatment

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Inlet Lift Station

The Wastewater Treatment Plant (WWTP) is responsible for the treatment of wastewater received from the wastewater collection system for discharge into Cibolo creek. The wastewater must be treated to meet strict federal and state limits before being discharged.

Wastewater is pumped to the plant from several offsite lift stations.  The wastewater enters the plant at the headworks, which is equipped with two bar screens, one manual and one mechanical. The bar screens remove large objects from the wastewater stream.  The wastewater then flows to preliminary treatment which consists of three primary clarifiers, trickling filters, intermediate clarifiers and then it is split equally into three aeration basins.

The air that is pumped in to the aeration basin helps create an environment for bacteria and other organisms (Bugs) to live and thrive which help breakdown the solids.
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Wastewater Clarifier

After preliminary treatment the wastewater enters three clarifiers where the flow stream is allowed to slow down. This allows the solids (Sludge) to settle out and the clear water (Supernatant) to rise to the top. The clear supernatant then flows to the chlorine contact chamber where it is treated with Chlorine, followed by de-chlorination with Sulphur Dioxide in order to discharge into Cibolo Creek.

Some of the effluent is processed at the Reclaimed Water Station that further filters the water through a series of sand media filters which allows bulk water sales of effluent to be used for irrigation purposes.

The “Sludge” that settle out in the clarifiers is pumped to one of two places, returned to the aeration basin to “Re-seed” the process, this is called Returned Activated Sludge or RAS.  The remaining “Sludge” from the bottom of the clarifiers called Waste Activated Sludge or WAS is pumped into the anaerobic digesters which also help break down the solids.  The remaining solids are then pumped to the belt press or one of three solids holding tanks and then land applied as soil enhancers in a hay field.  A belt press is used in the event there is no storage space and/or the fields are unable to be worked and then hauled to an approved landfill.

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The WWTP has the capacity to treat up to 6.2 million gallons per day (MGD) and has started an expansion project to raise that to 10 MG