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SWPPP Heat Map for Colorado

🗺️ SWPPP Heat Map – Colorado groundwater & washout requirements

Identify areas with designated groundwater basins, alluvial aquifers, and source water protection zones — where washout pans are critical.

🪣 HEAT ZONES — WASHOUT RISK
Designated Groundwater Basins (high priority)
Alluvial Aquifer zones (sensitive recharge)
Denver Basin bedrock aquifer area
Source water / well protection areas
General advisory (low-to-moderate risk)
⚖️ CO SWPPP mandate
Under CDPS Construction Stormwater Permit (COR400000) & Clean Water Act, sites disturbing ≥1 acre must implement BMPs for concrete washout [reference:0][reference:1]. Colorado CDPHE enforces these rules with short-notice inspections [reference:2]. Washout pans are essential in high-risk areas to prevent toxic slurry from reaching groundwater.
🌊 Why washout pans are needed near underground sources — Concrete washwater has pH >12 and contains metals / solids. In designated groundwater basins and alluvial aquifers, a spill can directly contaminate drinking water resources. Colorado's Ground Water Commission identifies 8 designated basins where groundwater is the primary supply [reference:3]. These "heat zones" on the map reflect real GIS data from the Colorado Geological Survey and Division of Water Resources.
🧾 Your site risk summary
Click on any county / region on the map to see SWPPP requirements and recommended washout pan type.
📍 Map layers compiled based on public GIS: Colorado Groundwater Atlas (CGS), Designated Basins (DWR), Alluvial Aquifer dataset, and Source Water Protection areas.
***Disclaimer:** This tool provides general guidance — always verify site-specific conditions with a certified SWPPP professional and CDPHE regulations.

Compiled by the Reborn Rental team, backed by our field engineers and dispatch staff working Denver-metro concrete washout and equipment rental jobs.

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