# Radon Mitigation Norwalk, IA | 5-Year Warranty, 24/7

> Radon testing and mitigation in Norwalk and northern Warren County. Iowa HHS-credentialed techs and a 5-year warranty.

URL: https://radonmitigationdesmoines.com/service-areas/norwalk/

![Radon technician arriving at a central Iowa home with a radon monitor](/images/misc/radon-technician-walking-up-the-driveway-of-a-cent.webp)

location\_on Serving Norwalk & nearby areas

# Radon Mitigation in Norwalk, IA for Lake and In-Town Homes

Last updated: October 27, 2026

Norwalk is a growing suburb just south of Des Moines with many newer homes. Testing after move-in shows whether a passive pipe is enough.

-   verifiedIowa HHS credentialed
-   schedule24/7 booking
-   shield5-year warranty

Request a Quote

[/contact/ →](/contact/)

 

phone\_in\_talk (515) 218-7447

[tel:+15152187447 →](tel:+15152187447)

-   verified Iowa HHS Credentialed
-   workspace\_premium NRPP / NRSB Certified Techs
-   shield 5-Year Warranty
-   support\_agent 24/7 Support

Know the risk

## Radon Mitigation Problems in Norwalk Basements

The local problem

### Rain-soaked sump pits that pull radon into Norwalk basements

**What you notice:** The sump pump runs hard after storms, the pit is open, and the basement tests high.

**Why it happens here:** Norwalk has seen more than 9 inches of rain in a single day, and lake-area homes in Lakewood and Echo Valley often rely on busy sumps. An open pit gives soil gas a direct path inside.

**How we fix it:** Residential radon mitigation here seals the sump with a gasketed, serviceable lid and often uses the drain tile to spread suction, followed by a post-mitigation test.

map

### Every Iowa county is EPA Zone 1

About 71% of Iowa homes test above the EPA action level of 4.0 pCi/L. Your neighbor's number tells you little about yours, so a 48-hour test is the only way to know.

ac\_unit

### Winter makes it worse

When the furnace runs and the ground freezes, warm air rises out of the house and pulls soil gas in through the slab, sump and cracks.

real\_estate\_agent

### High results stall closings

A failed radon test during inspection can hold up a sale. We test inside your contingency window and can install and verify a system before closing.

Radon services

## Radon Services South of the Metro

Testing, mitigation, new construction, commercial and maintenance from one credentialed team. The services most requested here are listed first.

![Radon mitigation pipe and fan installed on the exterior of a two-story Des Moines home](/images/misc/white-pvc-radon-mitigation-pipe-with-inline-radon-.webp)

home

### Residential Radon Mitigation

Radon systems matched to your foundation: basement sub-slab, crawlspace, exterior, waterborne and vapor intrusion.

View Service arrow\_forward

[Residential Radon Mitigation →](/residential-radon-mitigation/)

![Technician replacing a radon fan on the exterior pipe of a Des Moines-area home](/images/misc/radon-technician-on-a-ladder-replacing-an-old-rado.webp)

build

### Radon System Maintenance

Error codes, fans, pipes and joints, and inspections for existing radon systems, including ones we didn't install.

View Service arrow\_forward

[Radon System Maintenance →](/radon-system-maintenance/)

![Continuous radon monitor placed in the lowest lived-in level of a Des Moines home](/images/misc/continuous-radon-monitor-sitting-on-a-small-table-.webp)

monitor\_heart

### Radon Testing

CRM, short-term, long-term, real estate and post-mitigation radon testing by credentialed testers.

View Service arrow\_forward

[Radon Testing →](/radon-testing/)

![Commercial radon mitigation system on the exterior of an Iowa school building](/images/misc/radon-mitigation-pipes-and-fans-mounted-on-the-ext.webp)

domain

### Commercial Radon Systems

Testing and mitigation for schools, HUD multifamily, offices, warehouses and vapor intrusion sites.

View Service arrow\_forward

[Commercial Radon Systems →](/commercial-radon-systems/)

![New construction home in a Des Moines suburb with a radon pipe stub set before the slab pour](/images/misc/new-construction-home-framing-in-a-waukee-subdivis.webp)

construction

### New Construction Radon Systems

Passive system installs for builders, post-construction testing and passive-to-active upgrades.

View Service arrow\_forward

[New Construction Radon Systems →](/new-construction-radon-systems/)

Most local requests start with 

residential radon mitigation

[/residential-radon-mitigation/ →](/residential-radon-mitigation/)

 or 

radon system maintenance

[/radon-system-maintenance/ →](/radon-system-maintenance/)

. Every job is handled by the same Iowa HHS-credentialed crews behind our 

radon mitigation in Des Moines

[/ →](/)

, with the same post-mitigation test and 5-year warranty.

How it works

## Getting a Radon System in Four Steps

Most single-family homes are finished in one day, and every system is verified before we call it done.

1.  01 monitor\_heart
    
    ### Test
    
    A 48-hour continuous radon monitor test in your home, or send us an existing result.
    
2.  02 architecture
    
    ### Design
    
    We review your foundation, slab sections and sump, then pick suction points and routing.
    
3.  03 construction
    
    ### Install
    
    Credentialed techs install, seal and add a manometer. Most homes take one day.
    
4.  04 fact\_check
    
    ### Verify
    
    A post-mitigation test proves the result, backed by our 5-year warranty.
    

## Seal the Sump and Lower the Level

Send your result and foundation type for a written quote. Every system is verified with a post-mitigation test and covered by our 5-year warranty on systems and installs.

phone\_in\_talk (515) 218-7447

[tel:+15152187447 →](tel:+15152187447)

 

Request a Quote

[/contact/ →](/contact/)

Why choose us

## Why Lakewood and Echo Valley Homeowners Call Us

-   check\_circlePost-construction testing for newer homes
-   check\_circlePassive-to-active activation
-   check\_circleWalkout basement routing experience
-   check\_circleCredentialed testers and installers
-   check\_circle5-year warranty on systems and installs
-   check\_circle24/7 support

![Finished radon mitigation system on the side of an Iowa suburban home](/images/features/finished-radon-mitigation-system-with-white-pvc-pi.webp)

Client Verification

## Reviews From Local Homeowners

starstarstarstarstar

> "Our walkout tested over 6. They measured suction and designed one system for both slab sections. Post-test was under 2."

Ashley R. · Lakewood

starstarstarstarstar

> "New house with a passive pipe that wasn't doing enough. Activation took an afternoon."

Paul C. · Orchard Ridge

starstarstarstarstar

> "Quick to answer the phone and clear about what the numbers meant."

Jenna L. · Norwalk

Read our reviews on Google open\_in\_new

[https://search.google.com/local/reviews?placeid=ChIJRTO3QJee7ocRgEpZOJOW_-U →](https://search.google.com/local/reviews?placeid=ChIJRTO3QJee7ocRgEpZOJOW_-U)

Local knowledge

## Experience With Sumps, Walkouts and Newer Builds

Local logistics

### South of the Metro, Still Close

Norwalk is just south of Des Moines. We get there by Fleur Dr and Highway 28 or by I-35 and Highway 5, reaching Lakewood, Orchard Ridge and downtown Norwalk without trouble.

We also serve the rest of northern Warren County. Call our 24-hour line to book a test or install.

Local homes

### Newer Homes in a Growing Suburb

**Newer construction.** Much of Norwalk's housing is newer, and many homes have passive radon pipe. A post-construction test shows whether it's enough or needs an attic fan.

**Lake-area homes.** Homes around Lakewood include walkouts with split slab sections. We check suction reach before choosing suction points.

**Older in-town homes.** Established homes near downtown often need a standard sub-slab system and sump sealing.

### Local facts that shape the job

-   fact\_check Norwalk is mainly in Warren County with small portions in Polk County, and uses ZIP code 50211. 
    
    (en.wikipedia.org)
    
    [https://en.wikipedia.org/wiki/Norwalk,_Iowa →](https://en.wikipedia.org/wiki/Norwalk,_Iowa)
    
-   fact\_check Norwalk holds an unofficial Iowa record for the most rain in 24 hours, more than 9 inches on June 9-10, 2011. 
    
    (en.wikipedia.org)
    
    [https://en.wikipedia.org/wiki/Norwalk,_Iowa →](https://en.wikipedia.org/wiki/Norwalk,_Iowa)
    
-   fact\_check Norwalk annexed Lakewood and Echo Valley in 1989, and its population rose from 2,676 in 1980 to 12,799 in 2020. 
    
    (en.wikipedia.org)
    
    [https://en.wikipedia.org/wiki/Norwalk,_Iowa →](https://en.wikipedia.org/wiki/Norwalk,_Iowa)
    
-   fact\_check Lake Colchester is a man-made lake within the Lakewood development. 
    
    (en.wikipedia.org)
    
    [https://en.wikipedia.org/wiki/Norwalk,_Iowa →](https://en.wikipedia.org/wiki/Norwalk,_Iowa)
    

Where we work

## Neighborhoods and Routes We Cover in Norwalk

### Areas served

-   Lakewood
-   Echo Valley
-   The Legacy
-   Warrior Run Estates
-   Rolling Green
-   Downtown Norwalk
-   Highway 28 corridor

ZIP codes we cover: 50211

### Local landmarks

-   location\_onLake Colchester
-   location\_onEcho Valley Country Club
-   location\_onThe Legacy golf course
-   location\_onWarrior Run golf course
-   location\_onMcAninch Sports Complex
-   location\_onNorwalk Easter Public Library

### How we get there

We take Fleur Dr and Iowa Highway 28 south into Norwalk, or I-35 and Iowa Highway 5, to reach Lakewood, Echo Valley and downtown.

Straight Answers

## Norwalk Radon Mitigation FAQs

### Will sealing my sump pit stop the pump from working?

expand\_more

No. We fit a clear or gasketed airtight lid with sealed pass-throughs for the discharge pipe and cord. The pump runs as before, and you can still see and service it after heavy rain.

### Can you handle walkouts around Lake Colchester?

expand\_more

Yes. Lakewood walkouts often have more than one slab section. We measure suction reach and design one system to cover them when possible, routing outside or through the garage.

### Do you serve the rest of Warren County?

expand\_more

Yes. Along with Lakewood, Echo Valley, The Legacy and downtown Norwalk, we serve Indianola, Carlisle and other Warren County towns.

### My newer home has a passive pipe. Should I test?

expand\_more

Yes. A passive pipe can lower radon but often not below 4.0 pCi/L. Test after move-in, and we can add a fan to the existing pipe if needed.

### What warranty comes with a Norwalk install?

expand\_more

Every system and install we put in carries a 5-year warranty, and every job ends with a post-mitigation test so you have before-and-after numbers.

Still have a question?

Our support line answers 24 hours a day, 7 days a week.

phone\_in\_talk (515) 218-7447

[tel:+15152187447 →](tel:+15152187447)

 

Send a Question

[/contact/ →](/contact/)

Nearby service areas

## Also Serving Near Norwalk

-   location\_on West Des Moines
    
    [/service-areas/west-des-moines/ →](/service-areas/west-des-moines/)
    
-   location\_on Indianola
    
    [/service-areas/indianola/ →](/service-areas/indianola/)
    
-   location\_on Carlisle
    
    [/service-areas/carlisle/ →](/service-areas/carlisle/)
    
-   All service areas
    
    [/service-areas/ →](/service-areas/)
    

![](/images/hero/radon-technician-loading-white-pvc-pipe-and-radon-.webp)

24/7 booking & support

## Book Radon Mitigation in Norwalk

Credentialed testing and mitigation with 24/7 booking, a post-mitigation test and a 5-year warranty on systems and installs.

Request a Quote

[/contact/ →](/contact/)

 

phone\_in\_talk Call (515) 218-7447

[tel:+15152187447 →](tel:+15152187447)

-   verifiedIowa HHS credentialed
-   shield5-year warranty
-   fact\_checkPost-mitigation test