Stormwater Management: Flower Mound vs Little Elm
How do stormwater management rules compare between Flower Mound, TX and Little Elm, TX?
Little Elm has fewer restrictions than Flower Mound.
Flower Mound, TX
Denton County
Flower Mound regulates stormwater management under Chapter 54 (Stormwater Management and Drainage) and the Cross Timbers Conservation Development District overlay. The town holds a Texas Pollutant Discharge Elimination System (TPDES) Municipal Separate Storm Sewer System (MS4) permit. Development projects must implement stormwater pollution prevention plans and comply with post-construction stormwater quality requirements.
View full Flower Mound rules →Little Elm, TX
Denton County
Ordinance 1087 established the stormwater program to protect Lewisville Lake. A TCEQ MS4 permit and monthly drainage fee apply townwide.
View full Little Elm rules →Key Facts Comparison
| Fact | Flower Mound | Little Elm |
|---|---|---|
| Code | Ch. 54 Stormwater Management | - |
| TPDES Permit | MS4 general permit from TCEQ | - |
| SWPPP | Required for 1+ acre disturbance | - |
| CTCDD Overlay | Enhanced stormwater requirements | - |
| Contact | Public Works (972) 874-6405 | - |
| Program | - | Ordinance 1087 adopted November 2011 |
| Permit | - | TCEQ Small MS4 general permit |
| Receiving Water | - | Lewisville Lake (public water supply) |
| Construction Threshold | - | SWP3 required for 1+ acre disturbance |
| Funding | - | Monthly drainage utility fee |
Highlighted rows indicate differences between cities.
Flower Mound FAQ
Can I drain my pool or wash my car into the street storm drain?
No. Illicit discharge to the storm sewer system is prohibited in Flower Mound. Pool water, vehicle wash water, and other pollutants cannot be discharged into storm drains. Violations carry fines up to $500 per day.
What is the Cross Timbers Conservation Development District stormwater requirement?
The CTCDD overlay imposes enhanced environmental protections including additional stormwater detention and water quality treatment requirements for development within the overlay zone, beyond the standard Chapter 54 requirements.
Little Elm FAQ
Why is there a drainage fee on my Little Elm utility bill?
Little Elm adopted a stormwater drainage utility fee in 2011 through Ordinance 1087. The fee funds storm drain maintenance, drainage infrastructure improvements, and compliance with TCEQ stormwater permit requirements to protect Lewisville Lake water quality.
Can I wash my car or drain my pool into the street in Little Elm?
Pool water discharge and car washing runoff that enters storm drains may violate illicit discharge prohibitions. Stormwater drains flow directly to Lewisville Lake. Contact the Stormwater Utilities department for guidance on proper discharge procedures.
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