Looking for a SWPPP consultant in Onalaska, WI? Describe your project once and up to three stormwater consultants who work in Onalaska and La Crosse County get back to you with a quote. It's free and there is no obligation.
Onalaska is home to about 19,898 people (2024 Census Bureau estimate), a growing community (+5.6% since 2020). With 1,875 people per sq mi, it is a suburban area. Subdivisions and commercial sites here need stormwater permit coverage before grading.
Onalaska at a glance
- Population (Census Bureau estimate, 2024)
- 19,898 (+5.6% since 2020)
- Rank in Wisconsin
- 43rd of 607 cities and towns
- Land area
- 11 sq mi
- Population density
- 1,875 people per sq mi (suburban)
- Type
- City (Onalaska city)
- Main county
- La Crosse County
What to check before hiring in Onalaska
- Permit: in Wisconsin, check the state construction general permit.
- Local rules: Onalaska may add its own erosion control permit.
- Records: keep inspection reports on site.
- Price drivers: site size, phases, inspection frequency and duration.
Useful official resources
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EPA: construction stormwater
Official information and guidance.
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EnviroCert: CPESC
Official information and guidance.
Services available in Onalaska
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SWPPP and permit coverage
Preparation of the SWPPP and notice of intent under the construction general permit.
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Stormwater inspections
Routine and post-storm inspections with reports for the permit.
Frequently asked questions in Onalaska
How much does a SWPPP cost in Onalaska, WI?
It depends on site size, phases and inspections. Describe your project: consultants who serve Onalaska reply with a quote.
How long does it take?
Plans often take days to a couple of weeks, plus the permit review.
What happens at the end?
A notice of termination is filed once the site is stabilized.
Which stormwater consultants will contact me?
Up to three independent stormwater consultants who serve Onalaska and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.