The short answer
Edina’s water is very hard — 17 to 20 grains per gallon, which the USGS calls “very hard,” several times harder than typical U.S. tap water (City of Edina; USGS). That is not a health hazard, but it is what leaves scale in your pipes and water heater, spots on glassware, and stiff laundry — a fixable plumbing-and-appliance problem.
How hard is “very hard”? Edina by the numbers
Water hardness is measured in grains per gallon (gpg) — a count of the dissolved calcium and magnesium in the water. The City of Edina reports its water at 17 to 20 grains per gallon (roughly 290–340 ppm as calcium carbonate). By the USGS scale, anything above about 10.5 grains per gallon (180 mg/L) is “very hard” — so Edina sits firmly in the top band, well past the threshold.
| Measure | Figure | What it means |
|---|---|---|
| USGS “very hard” threshold | ~10.5 gpg (180 mg/L) | The point where hardness effects become pronounced. |
| Edina’s municipal water | 17–20 gpg (~290–340 ppm) | Comfortably above the very-hard line — several times harder than typical U.S. tap water. |
In plain terms: Edina is not borderline. Its water is hard enough that most homes see the effects on fixtures, appliances and laundry, which is why a water softener is the most common recommendation we make here.
Why is Edina’s water so hard?
It comes down to geology. Edina’s municipal supply is drawn entirely from groundwater — 18 wells, 381 to 1,150 feet deep, pulling from the Prairie du Chien–Jordan, Jordan and Mt. Simon aquifers (City of Edina). Groundwater sits in contact with mineral-rich rock for a long time, so it picks up the dissolved calcium and magnesium that make water hard. That is why nearly all of Edina reads very hard.
There is a local wrinkle worth knowing: only nine of the city’s eighteen wells route through a treatment plant for iron and manganese removal — the rest pump direct (City of Edina). So depending on which well feeds your block, hard water can arrive with iron staining on top of the scale. One neighborhood is different entirely: Morningside is on treated surface water from the City of Minneapolis, a separate taste-and-treatment profile from the rest of the city. Which well you are on is exactly the kind of detail a local water review pins down.
What hard water is quietly doing to your home
Hard water is legal and safe to drink — the issue is what it does to everything it touches. At 17–20 grains per gallon, the effects add up:
- Scale in your water heater and pipes. Mineral scale coats heating elements and narrows pipes, making the heater work harder and shortening its life.
- Spots and film on glassware and fixtures. The chalky residue on shower doors, faucets and “clean” glasses is hardness left behind as water dries.
- Stiff laundry and more soap. Hard water fights lather, so you use more detergent and soap, and fabrics come out stiffer and duller.
- Shorter appliance life. Dishwashers, coffee makers and ice makers all wear faster on scale-forming water.
- Dry-feeling skin and hair after showering — a common very-hard-water complaint.
None of this is dangerous. It is money and hassle: higher energy bills, appliances replaced sooner, and more cleaning. That is the honest case for softening — not fear, just wear and tear you can stop.
What to do about Edina’s hard water
The fix for hardness is a water softener, which removes the calcium and magnesium before they reach your plumbing. On very hard Edina water it is usually paired into a whole-home filtration setup so the same system also handles iron, sediment and chlorine taste at every tap. The systems we install use NSF-certified softening resin and carbon media (per our supplier, Honest Water Co.), so you get softening and better taste in one main-line train.
The honest first step is not a high-pressure in-home demo — it is a straight water-quality review with upfront pricing: premium, NSF-certified softeners starting at $3,799, a fraction of the $8,000–$12,000 the big in-home-demo dealers quote. If you are wondering whether it is worth it, our do-I-need-a-softener guide walks through the signs, and our softener cost guide breaks down the numbers.
Key takeaways
- Very hard. Edina’s water is 17–20 grains per gallon (~290–340 ppm) — “very hard” by the USGS scale (City of Edina; USGS).
- Not a health issue. Hardness is a plumbing-and-appliance problem, not a safety one; Edina records zero federal water violations (EWG, system MN1270011).
- Geology drives it. 18 groundwater wells drawing from the Prairie du Chien–Jordan, Jordan and Mt. Simon aquifers pick up dissolved minerals (City of Edina).
- It varies by block. Only nine of eighteen wells are treated for iron and manganese, and Morningside is on Minneapolis surface water (City of Edina).
- The fix is a softener — usually paired with whole-home filtration — starting at $3,799 installed, quoted upfront with no in-home demo.