Minot's water carries dissolved solids as high as 1,490 mg/L at 100 to 150 mg/L hardness, and spring flood mud and plains dust add to the glass work.
Minot softens its own well water from about 500 ppm down to 100 to 150, moderately hard to hard, though dissolved solids stay high, so drying the glass fast still matters. Spring flood mud and wind-driven plains dust are the regular jobs. Most houses carry one of two generations of modern glazing, from the flood rebuild or the oil boom, which a good quote reads correctly; August and September are the dependable months, and a single-story exterior runs $200 to $340.
The city softens its well water from about 500 ppm to a finished 100 to 150, but softening does not deal with everything, meaning softened well water still carries iron and manganese that mark sills and tracks.
| Hardness | 100–150 mg/L as CaCO₃ 100 to 150 ppm finished, softened down from about 500 ppm in the raw wells, as published by City of Minot. |
|---|---|
| pH | 9.4 |
| Sodium | 218 mg/L |
| Total dissolved solids | 1490 mg/L |
| Disinfectant | chloramine |
| Source and treatment | Sixteen wells, whose raw water the plant page gives as averaging about 500 ppm hardness; the Northwest Area Water Supply project is moving the primary source to Lake Sakakawea · Softening, which the operator states reduces hardness from about 500 ppm raw to a finished range of 100 to 150 ppm. Operations staff expect the Lake Sakakawea switch to roughly halve dissolved solids and soften the water further. · The plant softens. |
Not in the report: alkalinity, corrosion index, iron, manganese and chloride.
SOURCE · City of Minot 2024 Water Quality Report (calendar year 2024), and the water treatment plant page (minotnd.gov), with the EPA SDWIS federal treatment record, PWS ND5100660 · How we source these numbers
Minot's cycle follows valley dust and a hard winter shutdown rather than a pollen season.
NORTH DAKOTA SEASON BY SEASON →Minot softens its own well water and has spent nearly forty years waiting for a pipeline to replace it. The regional groundwater is genuinely poor — high dissolved solids, iron, manganese, sodium and sulfate — which is why the Northwest Area Water Supply project exists, and why Minot has been the interim supplier for half of northern North Dakota since 2008.
The city draws from wells in the Minot and Sundre aquifers and softens the water at its own treatment plant, where the softening and chemical dosing infrastructure was replaced under a contract awarded in 2018 after the filtration capacity had already been upgraded in an earlier project.
Groundwater across this part of North Dakota does not meet secondary drinking water standards on its own — elevated total dissolved solids, iron, manganese, sodium, sulfate and hardness are the regional norm, and nearby Berthold's supply was ruled unsuitable outright.
Because Minot's treated water is the best available locally, the city has supplied Berthold, Burlington, Kenmare, Sherwood, Bottineau, Westhope and Mohall plus several rural systems as an interim supply since 2008. That makes this plant a regional utility, not a municipal one.
The Northwest Area Water Supply project, started in 1987 to bring Missouri River water up from Lake Sakakawea, lost 17 years to litigation that ended in 2019 and is now projected to finish in 2029 with a final upgrade at the Minot plant. The water chemistry a cleaner works with here will change when it does.
Iron and manganese are the local staining risk, not calcium. Where they reach the tap they oxidise into brown and black marking at the sill and in the tracks, and that deposit needs a detergent and a brush rather than a rinse.
The 2011 Souris River flood inundated thousands of homes on the valley floor, and the rebuilding that followed means a large share of the low-lying stock is post-2011: newer sealed units, coated glass and raised foundations that put first-floor glazing higher off the ground than it looks.
The Bakken oil boom added a fast band of new construction around the city's edges on a different cycle from the flood rebuild, so Minot has two distinct generations of modern glazing and very little in between.
The air base north of town is a substantial institutional customer with its own procurement rhythm, which — together with a hard winter shutdown — is what keeps the annual book from collapsing into a five-month season.
Two generations of modern glazing — flood rebuild and oil-boom — with nothing in between is what a Minot quote has to read correctly.
Post-2011 rebuilt stock sits higher off the ground than it looks, and oxidised iron marking needs detergent and a brush.
OPEN COST ESTIMATOR →Nearest EPA particle monitor: 39 km
In Minot only city employees on duty, or work supervised by the fire department, may open or tamper with a hydrant on the waterworks system; anyone else needs permission from the superintendent of water and sewers or the city engineer before connecting a hose or tank fill.
Minot Code §31-44: opening or tampering with fire hydrants · checked September 2026
Minot forbids discharging any waste water to a drain or sewer that connects, directly or indirectly, to a storm sewer or a natural outlet.
Minot Code §31-73: waste waters not to be drained into storm sewers · checked September 2026
Minot's Land Development Ordinance (adopted 2021, amended November 2025) layers five overlays on its base zones, for planned developments, airport noise, the runway buffer, wellhead protection and gateway corridors, and none of them is a historic district. Downtown's CBD zone asks new building to echo the old business district's character but sets no review of window changes on existing buildings.
Minot Land Development Ordinance, Article 2: districts and overlays (Chapters 2.15, 2.23–2.27) · checked September 2026
Late-winter and early-spring ice-melt residue carries chloride-residue, mineral residue, and organic residue composite. Percarbonate-citric ladder protocol required on the worst-affected lower-pane commercial and street-level retail. Same handling pattern Linnea Jorgensen documents for Minnesota ice-dam meltwater.
The city softens its well water from about 500 ppm to a finished 100 to 150, but softening does not deal with everything, meaning softened well water still carries iron and manganese that mark sills and tracks.
Residential window cleaning in Minot typically runs $7–11 per pane or $200–340 for a standard single-story exterior. Two generations of modern glazing — flood rebuild and oil-boom — with nothing in between is what a Minot quote has to read correctly.
Minot's drier, frost-free months are August and September, by NOAA's 1991–2020 normals for the Minot International Airport station, where June brings the most rain. The calendar on this page marks August (after the May 20 bloom and after smoke season). Frost nights usually run from October 1 to May 10.
Not as the final rinse: City of Minot publishes dissolved solids of 1490 mg/L, enough to spot as it dries, so finish with pure water. Its sodium, up to 218 mg/L, leaves a salt film that pulls moisture back, so rinse it off rather than let it dry. It draws on Sixteen wells, whose raw water the plant page gives as averaging about 500 ppm hardness.
In Minot the dominant residue patterns include spring flood mud residue and high plains wind-driven dust. Minot's cycle follows valley dust and a hard winter shutdown rather than a pollen season.
Post-2011 rebuilt stock sits higher off the ground than it looks, and oxidised iron marking needs detergent and a brush.
Rail-era commercial core with brick blocks and transom glass, on the valley floor and within the 2011 flood footprint. Mixed original and post-flood glazing on the same frontage. College Heights and North Hill have their own housing stock and glazing as well.
Just over the North Dakota line