Thornton vs Westminster
How do stormwater management rules compare between Thornton, CO and Westminster, CO?
Thornton and Westminster have similar restriction levels.
Thornton, CO
Adams County
Thornton requires stormwater management for new development and significant property modifications. Runoff must be controlled on-site through retention, detention, or infiltration systems.
View full Thornton rules →Westminster, CO
Adams County
Westminster requires stormwater management for new development and significant property modifications. Runoff must be controlled on-site through retention, detention, or infiltration systems.
View full Westminster rules →Key Facts Comparison
| Fact | Thornton | Westminster |
|---|---|---|
| New Development | Stormwater plan required | Stormwater plan required |
| Runoff Control | On-site retention | On-site retention |
| Maintenance | Owner responsibility | Owner responsibility |
| Topic | Stormwater | Stormwater |
Highlighted rows indicate differences between cities.
Thornton FAQ
Do I need a stormwater plan for my project?
Generally required for new construction and major renovations that increase impervious surface area. Small residential projects may be exempt.
What is an illicit discharge?
Any non-stormwater substance entering the storm drain system, including paint, oil, chemicals, or sediment. Report violations to Thornton public works.
Westminster FAQ
Do I need a stormwater plan for my project?
Generally required for new construction and major renovations that increase impervious surface area. Small residential projects may be exempt.
What is an illicit discharge?
Any non-stormwater substance entering the storm drain system, including paint, oil, chemicals, or sediment. Report violations to Westminster public works.
Compare other topics
See how Thornton and Westminster compare on other ordinance categories.
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