Fayetteville water is 74 mg/L hard, and the bigger jobs are heavy oak and hickory pollen each spring and Ozark red-clay splash on the lower panes.
Fayetteville's water sits at the gentle end of moderately hard and is almost all calcium, which lifts with a mild acid, so scale is not the problem. Heavy oak and hickory pollen each spring and Ozark red-clay splash on the lower panes are the bigger jobs, and July to September is the dependable window. Ridge homes with view glass cost more to service safely than the same house on the flat, and a single-story exterior runs $240 to $430.
At 74 mg/L Fayetteville sits at the soft end of moderately hard, and the composition matters more than the total — magnesium at 1.0 mg/L means almost all of it is calcium, which is the easier of the two to remove and responds to a mild acid. Scale is not what fails a job in this city. What does is pH: at 8.23 the supply is alkaline enough that a strong alkaline cleaner has nothing to react against, so concentration works against the finish rather than for it.
| Hardness | 74 mg/L as CaCO₃ Soft to moderately hard — 74 mg/L as CaCO3 sits just above the 60 mg/L soft threshold, and is almost entirely calcium, as published by City of Fayetteville (Beaver Water District supply). |
|---|---|
| pH | 8.23 |
| Alkalinity | 59 mg/L as CaCO₃ |
| Iron | < 0.01 mg/L |
| Sodium | 7.28 mg/L |
| Chloride | 8.02 mg/L |
| Total dissolved solids | 115 mg/L |
| Source and treatment | Purchased finished water from Beaver Water District, a surface-water wholesaler; Fayetteville publishes no competing figure · At the district: algae control, permanganate, powdered activated carbon, rapid mix, coagulation, flocculation, sedimentation, rapid sand filtration, pH adjustment, chlorine dioxide, pre- and post-chlorination and fluoridation · No softening step. |
Not in the report: corrosion index, manganese and disinfectant.
SOURCE · Beaver Water District 2025 Annual Water Quality Report and rolling Finished Water Quality Report (bwdh2o.org), with the EPA SDWIS federal treatment record, PWS AR0000038 · How we source these numbers
The spring pollen flush is the single event that resets the residential year, and washing into it wastes the work — glass recoats within days while the oaks are shedding. The productive pattern is to clear the backlog once it passes, then run a lighter cycle driven by canopy drip and red-clay splash through the summer. Winter is workable between ice events but the hillside neighbourhoods drop out of reach for days at a time, so a route that mixes ridge and valley addresses is more resilient than one that does not.
ARKANSAS SEASON BY SEASON →Fayetteville buys treated water from the regional district that draws Beaver Lake, and that district publishes rolling finished-water chemistry rather than a single annual figure: hardness 74 mg/L, calcium 28, magnesium just 1.0, alkalinity 59, pH 8.23, TDS 115. The published total reconciles exactly with the published calcium and magnesium, which is a better guarantee than a bare number. Soft, almost purely calcium water that deposits little — so the working variables here are alkaline pH, Ozark pollen, hillside access and a university calendar.
Fayetteville does not treat its own water. It buys it from a regional district formed in 1957 that draws Beaver Lake — an impoundment of the White River — and wholesales treated water to the four largest Northwest Arkansas cities, which then resell it through their own distribution systems.
That district publishes finished-water chemistry on a rolling basis rather than once a year, and the figures are unusually complete for a wholesaler: total hardness 74 mg/L, calcium 28, magnesium 1.0, alkalinity 59, pH 8.23, total dissolved solids 115, conductivity 198 microsiemens, sulfate 27.9, chloride 8.02 and iron around 0.01.
Those numbers are internally consistent, which is worth more than any single one of them. Calcium at 28 and magnesium at 1.0 arithmetically produce a total hardness of 74 as calcium carbonate — the published total agrees with the published constituents, so the figure is not a rounded estimate carried over from an older report.
At 74 mg/L this is soft to moderately soft water and it barely deposits. Magnesium at 1.0 mg/L is the striking part: this is almost purely calcium hardness, and what little residue forms lifts with a mild acid rather than needing anything aggressive.
The variable worth more attention is pH at 8.23, which is alkaline enough to matter. An alkaline cleaner on alkaline supply has nothing tempering it, so mixing strong here produces streaking rather than cleaning power — dilute below the label rate and the result improves.
Total organic carbon at 1.63 mg/L reflects a forested Ozark watershed, and organic loading is what drives disinfection by-product formation in this kind of supply. It is a taste-and-treatment issue rather than a glass one, but it explains why chlorine runs at 1.80 mg/L in the finished water.
Spring in the Ozarks is a pollen event rather than a pollen season. Oak and hickory across the hills put down a heavy yellow-green coat over a few weeks, and there is no useful residential work to be done in the middle of it — the sensible pattern is a hard reset once it clears.
Ice storms are the regional hazard that shapes the winter calendar. The hills around the city ice more readily than the valley floor, and the hillside neighbourhoods can be unreachable for days at a time in a way the flat southwest side is not.
Slope is a genuine operational fact here in a way it is not in most of the state. Mount Sequoyah and the eastern ridges mean ladder footing on uneven ground, and the view-facing glass that makes those houses desirable is also the largest and most awkward to reach.
The university sets the commercial rhythm. Move-in, game weekends and semester breaks decide when institutional and student-housing work can actually happen, which makes this a market with a calendar quite unlike the rest of Arkansas.
Slope is the honest first input — a ridge property with view glass costs more to service safely than an identical house on the flat, and pricing that ignores it loses money. After that: heritage sash in the historic district prices on pane count and care; Dickson Street prices on out-of-hours access; the university and student-housing book prices on schedule windows rather than difficulty; and the southwest subdivisions price on route density, which is the best in the city. Water treatment is not a cost factor at all.
Soft water and a mild climate put a good homeowner result within reach on the flat parts of town, and the one chemical caution is counterintuitive: this water is alkaline, so a stronger mix streaks rather than cleans. Two things genuinely do not transfer to a ladder. Hillside properties on Mount Sequoyah and the eastern ridges have footing problems that no amount of care fixes, and historic divided-light sash in Washington-Willow takes four or five times the expected time per window and punishes impatience on the glazing bars.
OPEN COST ESTIMATOR →2025 annual mean at the Springdale monitor, 600 South OLD Missouri Road, 12.8 km north of the city (EPA site 05-143-0005).
Largest air release: Conagra Foods Packaged Foods LLC, 1100 W 15TH ST (food), inside the city limits, 7,267 lb in 2024.
Fayetteville's water chapter reserves its fire hydrants for city water staff and the Fire Department: anyone else who opens, closes or tampers with one breaks the code, and even authorized users may turn them only with the proper hydrant wrench. A crew topping up a water-fed-pole tank needs another supply.
Fayetteville Code 51.003: unauthorized opening or closing of fire hydrants · checked September 2026
Only storm water may go into Fayetteville's storm sewer system; throwing, draining or discharging anything polluted into it, or allowing someone under your control to, is prohibited.
Fayetteville Code §170.09: illicit discharge detection and elimination · checked September 2026
Fayetteville requires a certificate of appropriateness before a qualifying building or structure in one of its local ordinance historic districts is put up, altered, restored, moved or demolished, and its design guidelines can extend that to walls, fences, lighting, steps and paving.
Fayetteville Code §33.232: certificate of appropriateness · checked September 2026
Recurring ice-storm events produce extended residential-and-commercial workload. The 2009 Arkansas-Tennessee-Kentucky ice storm produced statewide extended workload. Wet-rinse-first protocol on post-ice-storm residential.
At 74 mg/L Fayetteville sits at the soft end of moderately hard, and the composition matters more than the total — magnesium at 1.0 mg/L means almost all of it is calcium, which is the easier of the two to remove and responds to a mild acid. Scale is not what fails a job in this city.
Residential window cleaning in Fayetteville typically runs $8–13 per pane or $240–430 for a standard single-story exterior. Slope is the honest first input — a ridge property with view glass costs more to service safely than an identical house on the flat, and pricing that ignores it loses money.
Fayetteville's drier, frost-free months are July to September, by NOAA's 1991–2020 normals for the Fayetteville Drake Field station, where May brings the most rain. The calendar on this page marks July (after the April 4 bloom and after smoke season). Frost nights usually run from October 21 to April 15.
Yes, if the rinse is squeegeed off before it dries: City of Fayetteville (Beaver Water District supply) publishes dissolved solids of 115 mg/L, between this site's two dissolved-solids flags. It draws on purchased finished water from Beaver Water District, a surface-water wholesaler.
In Fayetteville the dominant residue patterns include heavy oak and hickory pollen through the spring flush and ozark red-clay splash on lower panes. The spring pollen flush is the single event that resets the residential year, and washing into it wastes the work — glass recoats within days while the oaks are shedding.
Soft water and a mild climate put a good homeowner result within reach on the flat parts of town, and the one chemical caution is counterintuitive: this water is alkaline, so a stronger mix streaks rather than cleans. Two things genuinely do not transfer to a ladder.
The entertainment and restaurant spine between campus and downtown. Large bar and restaurant frontages, late trading hours that force early-morning service, and glass judged by people standing three feet from it. Washington-Willow and Mount Sequoyah have their own housing stock and glazing as well.
Just over the Arkansas line