Hard Water Mineral Buildup
Cottage Grove tests at 17 grains per gallon (extremely hard). Untreated, this scales every faucet, water heater, dishwasher, and washing machine in your home.
Service Area
Plumber in Cottage Grove, MN
Cottage Grove, MN water tests at 17 grains per gallon. A.J. Alberts has been installing softeners, filtration, water heaters, and full residential plumbing for Twin Cities homes since 1989.
Photo: Wikipedia
Licensed Minnesota (MN PC150039)
★ 4.9 stars, 800+ reviews Best of Woodbury · 2025 Winner, 2026 Finalist
Free in-home water test
Quick Summary
A.J. Alberts Plumbing serves Cottage Grove, MN for water softener installation, water conditioning, plumbing repair, water heater service, drain cleaning, and boilers. Free in-home water test at every appointment. Written upfront pricing. Lifetime craftsmanship warranty. Serving Washington County, MN since 1989. Call 651-738-0580.
Water Quality in Cottage Grove
Cottage Grove sits at the south end of the East Metro PFAS contamination zone, with a mix of 1990s-2000s subdivisions and rural acreage along the Mississippi bluffs. PFAS filtration is a near-universal recommendation for Cottage Grove homes regardless of municipal treatment status.
17
grains per gallon
PFAS-affected — filtration + softener required
Among the most PFAS-impacted communities in Minnesota: 8 of 11 municipal wells tested non-compliant for PFAS per MDH documentation. Even with major treatment infrastructure underway, every Cottage Grove household should have a certified PFAS filter, especially homes on private wells.
Primary water source
Municipal water from city wells drawing from the Prairie du Chien-Jordan aquifer. Cottage Grove was among the most PFAS-impacted communities in Minnesota: 8 of 11 municipal wells tested non-compliant at peak, leading to major treatment infrastructure under the 3M settlement.
Recommended treatment for Cottage Grove homes:
Whole-home PFAS filtration plus advanced water softener — both required
See treatment options →For the full Twin Cities water quality picture, see our water quality map and city-by-city data.
Common Water Issues We Solve in Cottage Grove
Most Cottage Grove homes we visit fall into one of these four buckets. Free in-home test confirms which apply to yours.
PFAS Contamination
Cottage Grove is within the documented East Metro PFAS contamination zone tied to historical 3M discharge. Even with municipal treatment, many homes install a certified household PFAS filter as a defense-in-depth layer.
Drinking Water Contaminants
Beyond hardness, Cottage Grove tap water can carry trace dissolved metals, sediment, and chlorination byproducts. Under-sink reverse osmosis delivers cleaner drinking and cooking water than most bottled.
Aging In-Home Plumbing
Many Cottage Grove homes are 30+ years old. Original water heaters, softeners, supply lines, and shut-off valves are often due for replacement. Proactive maintenance prevents emergencies.
Free In-Home Water Test in Cottage Grove
No fee. No obligation. We confirm what is actually in your specific water.
Services Available in Cottage Grove
Water Softener Installation
Sized and programmed for the extremely hard water common in Cottage Grove. Lifetime craftsmanship warranty.
Whole-Home Filtration
Carbon, sediment, PFAS, and iron filtration matched to your specific water test.
Reverse Osmosis
Under-sink and whole-home RO systems for the cleanest possible drinking water.
Plumbing Services
Leak repair, fixture installation, sump pumps, water line repair, gas lines.
Water Heaters
Tank, tankless, and hybrid heat pump installation and repair. Same-day options.
Boiler Service
Hydronic boiler repair, replacement, and radiant floor heat. Critical Minnesota winter work.
Drain Cleaning
Cable, hydro jetting, and in-line camera. Mainline backups handled same-day.
Free Water Test
Free on-site testing for hardness, iron, chlorine, pH, and TDS. No obligation.
Maintenance Plans
Annual plumbing inspection, water heater flush, softener tune-up, priority scheduling.
A.J. Alberts Services in Cottage Grove
Why Cottage Grove Homeowners Choose A.J. Alberts
37 Years
Locally owned and operating across the Twin Cities since 1989. Best of Woodbury 2025 Winner, 2026 Finalist.
10 / 5 / 0
10 plumbers, 5 master plumbers, 0 commissioned salespeople. No upsell pressure, ever.
4.9 stars
800+ Google reviews from real Twin Cities customers. Lifetime craftsmanship warranty on every install.
Read all reviews →
What Cottage Grove-Area Customers Say
A small sample of the 800+ Google reviews we have earned across the Twin Cities.
★★★★★
"They installed a new water softener for us. The difference is amazing. Clean installation, no mess left behind, and very respectful of our home."
Jessica R.
Cottage Grove, MN
★★★★★
"AJ Alberts came out same day when our water heater broke. The technician was polite, explained the costs upfront, and had it replaced in a few hours. Highly recommend!"
Sarah M.
Woodbury, MN
★★★★★
"We've used them for over 10 years. Always reliable, always professional. It's great having a local plumber you can trust not to overcharge."
David K.
Stillwater, MN
Nearby Areas We Also Serve
Cottage Grove Service FAQs
Do you serve Cottage Grove, MN?
Yes. A.J. Alberts Plumbing is fully licensed in Minnesota (MN License PC150039) and serves Cottage Grove, MN for plumbing, water softener installation, water conditioning, water heater service, and drain cleaning. We handle most service calls within a day or two of booking.
How fast can A.J. Alberts get to my Cottage Grove home?
For non-emergency service in Cottage Grove, same-day to next-day appointments are typical. For active leaks, burst pipes, or no-heat emergencies, call 651-738-0580 immediately and we will prioritize you.
Do you offer free water testing in Cottage Grove?
Yes. Free in-home water testing is included at every Cottage Grove appointment, no obligation to buy. We test hardness, iron, chlorine, pH, and total dissolved solids on-site and walk you through what the results mean for your home.
If Cottage Grove treats PFAS at the city level, do I still need a home filter?
Many Cottage Grove homeowners install certified household PFAS filtration as a second layer because (a) the contamination history is severe, (b) PFAS exposure also happens during showering and laundry which a city-level treatment does not address point-of-use, and (c) homes on private wells in the surrounding area are not on city treatment at all.
What size water softener does a Cottage Grove home need?
Cottage Grove water tests at approximately 17 grains per gallon, which is in the extremely hard tier. For a typical 4-person household, that means a 48,000 to 64,000 grain capacity softener with a metered Fleck or Clack valve. Smaller units regenerate too often and let hard water bleed through.
Need Service in Cottage Grove?
Schedule a free in-home water test, or call us directly for immediate service.
A.J. Alberts Plumbing & Water Conditioning
7975 Afton Road · Woodbury, MN 55125 · 651-738-0580