Public Works

Sewer System Smoke Testing & Inspection

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Inspection crews periodically conduct a physical survey of Wylie’s wastewater collection system, which includes the use of smoke testing and the opening of manholes in the street and backyard utility easements. Information from this study is used to repair and improve the wastewater collection system.

These tests are conducted on a per-neighborhood basis throughout the city. Residents are notified by door hangers and yard signage when testing is about to begin in their area. Testing can take up to 12 weeks, depending on weather and other factors.

Smoke testing is used to locate breaks and defects in the sanitary sewer lines. The smoke is non-toxic, leaves no residue, and creates no fire hazard. It is harmless to humans, pets, food, and material goods. It is best, however, to avoid unnecessary exposure to the smoke, because any smoke can irritate the nasal passages. Any irritation should be temporary and quickly disappear after exposure has ceased.

During this testing, white smoke will exit through roof vent pipes, outdoor sewer cleanouts, manholes, and possibly through interior drains if p-traps are dry or defective plumbing exists. To minimize the likelihood of smoke entering the home, residents may pour a gallon of water down seldom-used drains.

At no time do field crews have to enter homes or businesses. If a sanitary sewer line or manhole is located in easements within backyards, members of the inspection crews will need access to the backyard.

Smoke Testing FAQ

For more information or for special assistance, residents are asked to call the City of Wylie at 972-442-7588.

Smoke Test 1      Smoke Test 2      Smoke Test 3

contact information

Wylie Municipal Complex 
300 Country Club Rd., Building 100 Wylie, TX 75098
Main #: 972-516-6000 
Monday – Friday; 8 am – 5 pm

Building Inspection2nd floor 

City Manager, 1st floor 

City Secretary1st floor 

Code Enforcement, 2nd floor 

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Planning and Zoning, 2nd floor 

Parks Administration, 3rd floor 

Purchasing, 1st floor 

Utility Billing
, 1st floor 

Recreation Center
300 Country Club Rd., Building 200

Monday – Thursday, 5 am – 9 pm
Friday, 5 am – 5 pm
Saturday, 8 am – 8 pm
Sunday, 1 pm – 5 pm

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300 Country Club Rd., Building 300

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2000 N. Hwy. 78
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1400 S. Ballard Ave., 972-429-8071
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949 Hensley Ln., Building 300
After-hours emergency? Contact Police Dispatch, 972-442-8171
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949 Hensley Ln., Building 200
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949 Hensley Ln., Building 100
After-hours emergency? Contact Police Dispatch, 972-442-8171
Monday – Saturday, 8 am – 5 pm

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800 Thomas St.
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Thomas and Mattie Brown House
301 North Ballard Ave.
*Temporarily closed for improvements

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250 S. Hwy. 78
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