WQMP threshold check (free)
- Project location and watershed
- New and replaced impervious area
- Priority project categories
- Soils and infiltration
- Likely BMP types
- Who prepares and signs the WQMP
Southern California developers and builders
Where is the project?
Free check of whether your Southern California project needs a WQMP, with San Bernardino County's thresholds as the worked example. Your city decides.
- Free to read
- No sign-up until the draft
- Hands off to the right door
ePlan fills in
- Soils
- Land cover
- Roof area
- Impaired waters
How it works
WQMP threshold check, from one answer
- Pin the site and enter the impervious area.
- ePlan checks the county thresholds and pulls soils and land cover. Your city's reviewer has the final say.
- Read the free check. Disturbing an acre or more? Start a SWPPP draft.
What you get
WQMP threshold check and 1 more document
The check is free. The paperwork after it is drafted at the SWPPP door.
Construction SWPPP
- Site and receiving water
- Erosion and sediment controls
- Inspections
From public data
What ePlan fills in, and from where
- Soils and infiltrationUSDA NRCS Web Soil Survey (SSURGO)
- Land coverUSGS/MRLC National Land Cover Database
- Existing roof areaMicrosoft US Building Footprints
- Impaired receiving watersEPA ATTAINS
10,000 sq ft
of new impervious surface is where new development in San Bernardino County's Santa Ana watershed area needs a WQMP
Source: San Bernardino County Land Use Services FAQ (updated Dec. 4, 2024)
Ready for the paperwork?
Disturbing an acre or more? Answer four questions and get a site-specific SWPPP draft with BMPs, an inspection form and NOI notes. Free to read.
Questions
WQMP: what people ask
Does my project need a WQMP?
In San Bernardino County's Santa Ana watershed area: new development creating 10,000 sq ft or more of impervious surface, or redevelopment adding or replacing 5,000 sq ft or more. In the Mojave area the threshold is 5,000 sq ft.
Which project types have lower thresholds?
In the Santa Ana area: auto repair shops and restaurants at 5,000 sq ft, hillside development of 5,000 sq ft or more on erosive soils, and gas stations of 5,000 sq ft or more or with 100 or more average daily trips.
Why do cities require a WQMP?
Large and medium municipal storm sewer permits must include a program to reduce pollutants in runoff from areas of new development and significant redevelopment after construction. The WQMP is how these cities apply it to each project.
The rules this door follows
Related doors
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Where is the construction site?
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What's the property address?
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Which county and parcels are you enrolling?
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What is the project, and where?
Western farmers, ranchers and landowners with a water right
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Which water right do you want to change?
Homeowners · ADU
ADU permit
Can you build an ADU here?
WQMP: check it free
Answer it and ePlan opens the SWPPP door with your answer filled in.