Wichita water carries 140 mg/L sodium and 200 mg/L chloride, close to the 250 limit, so it dries as a salty film that pulls moisture back out of the air.
Wichita's water is hard, but the bigger issue is salt: high sodium and chloride dry into a salty film that pulls moisture back out of the air. April and August to October are the best months to wash. Looser routes and lower-rise housing keep prices below the Johnson County market for the same glass, with a single-story exterior at $240 to $400.
Published and checkable: 150 mg/L as calcium carbonate, sampled 22 May 2023, in the city's standard secondary-contaminants table against a 400 mg/L secondary limit. That is the middle of the hard band, not the extreme the old 310 implied. The 2026 report puts pH at 8.5 and the Langelier index at +0.3, mildly scale-forming; the 2023 table gave calcium at 31 mg/L and magnesium at 17. Because the city blends a reservoir and a wellfield in a near 55/45 split, and because a new treatment facility came online in 2025, treat this as a current reading rather than a fixed property of the city.
| Hardness | 150 mg/L as CaCO₃ Hard, as published by City of Wichita. |
|---|---|
| pH | 8.5 |
| Alkalinity | 2.68–79 mg/L as CaCO₃ |
| Corrosion index | Langelier index +0.3 |
| Manganese | 0.0016 mg/L |
| Sodium | 140 mg/L |
| Chloride | 200 mg/L |
| Disinfectant | ozone + chloramine |
| Source and treatment | Surface water, per the EPA SDWIS federal record · Pre-ozonation, rapid mix, coagulation, flocculation, sedimentation and rapid sand filtration, with pre-chlorination and chloramines carried as the distribution residual · No softening step. |
Not in the report: iron and total dissolved solids.
SOURCE · City of Wichita 2026 KDHE Consumer Confidence Report (PWS KS2017308), with the EPA SDWIS federal treatment record for the train and residual · How we source these numbers
Two overlapping problems on different clocks. Salt and mineral film are constant and worst when water flashes off in heat, so avoid full sun from June through August. Wind-driven grit peaks April to June with the sustained southerlies and will undo a wash within hours on exposed elevations, which makes late spring the worst value in the year despite the mild weather. Best windows are September and early October once the wind drops, and again after the first hard frosts.
KANSAS SEASON BY SEASON →Wichita measures 150 mg/L total hardness, which puts it in the middle of the hard band. The supply is genuinely mixed and close to evenly split: Cheney Reservoir surface water at roughly 55% of 2023 usage against 83 Equus Beds wells at 45%, so the finished chemistry moves with the blend. What separates Wichita from the lime-softened Kansas plants is pH: at 8.5 with a Langelier index of just +0.3, it spots rather than films, and a normal squeegee-to-dry-edge routine handles it. The real complication is salt — sodium at 140 mg/L is over the aesthetic standard and chloride is 200, so the residue is mixed salts and it needs a proper final rinse. Operationally, the constraint is wind: sustained southerlies from April to June put grit back on glass within hours.
The city publishes total hardness at 150 mg/L as calcium carbonate, sampled 22 May 2023 against a 400 mg/L secondary standard. That places Wichita in the middle of the hard band rather than at the extreme end of the scale, and the band is what decides whether a quote opens by warning about etching or about spotting. Kansas utilities report a standard secondary-contaminant table, which is the only reason that number is checkable.
Wichita genuinely runs two supplies and the split is close to even, which is unusual enough to matter. In 2023 the Cheney Reservoir surface intake delivered 10.22 billion gallons, about 55% of usage, and the Equus Beds wellfield — 83 groundwater wells — delivered 8.25 billion, about 45%. Finished water out the door was 18.47 billion gallons. There is also an aquifer storage and recovery intake on the Little Arkansas River. A mixed supply means finished-water chemistry shifts with the blend, so a reading taken one year is a guide rather than a constant.
Unlike the lime-softened Kansas plants to the northeast, Wichita's finished water sits at pH 8.5, the top of the secondary range but well below the softened plants, with a Langelier index of +0.3. Mildly scale-forming rather than aggressively so. In practice that means Wichita leaves ordinary mineral spotting rather than the stubborn alkaline film found on Topeka and Johnson County glass, and it responds to a normal squeegee-to-dry-edge routine instead of needing an acid detail.
Sodium is the outlier: 140 mg/L against a 100 mg/L secondary standard, so the city exceeds the aesthetic guideline for sodium. Paired with chloride at 200 mg/L against a 250 limit, this is a salty water by Kansas standards. That salt load is why Wichita rinse water dries to a visible film rather than clean spots — the residue is mixed salts, not just carbonate, and it needs a genuine final rinse.
Bromate ran to 9.8 ppb in October 2023 against a 10 ppb maximum contaminant level, with a range from 2.5. That is a disinfection by-product sitting essentially at its limit, and it is the kind of number that moves a plant's operating decisions from one year to the next.
Wichita does not fluoridate. The CCR reports fluoride at 0.3 ppm with natural deposits as the typical source, against the 0.7 ppm level most systems dose to. Nothing about that changes the glass, but it is a genuine point of difference from every other large Kansas city on this site.
The city maintains roughly 130 miles of raw water pipeline and more than 2,400 miles of potable distribution main, and a new Northwest Water Facility was commissioned to come online in 2025 with capacity over 120 million gallons a day, able to treat either source independently or a blend of the two. A plant changeover is the single most likely reason for finished-water chemistry here to move, so re-read the figure rather than assuming it holds.
Aviation manufacturing anchors the commercial book — Spirit AeroSystems and Textron Aviation are both headquartered in the city — and that work is priced on contract frequency and site access rather than per pane. Sustained southerly wind through April, May and June is the real operational constraint: multi-day runs above 25 mph make work at height a judgment call and put grit back on glass within hours of a wash.
The water quality report is published in English, Spanish and Vietnamese, which is a useful signal about who the customer base actually is in a city this size.
Wichita prices below the Johnson County market on the same glass because route density is looser and the stock is lower-rise. Add for pane count in Eastborough and the east-side detached market, add for grit-return frequency on wind-exposed elevations in spring, and price the aviation manufacturing and Delano commercial frontage on contract frequency and access compliance rather than per pane.
Crown Heights and much of College Hill is genuinely DIY-friendly — the water spots rather than films, so a bucket, a decent squeegee and shade are enough. Eastborough should be hired out on pane count and height. The thing no homeowner should attempt is working at height on a 25 mph southerly day in May, which is exactly when the glass looks worst and the temptation is highest.
OPEN COST ESTIMATOR →2025 annual mean at the Peck monitor, 707 E 119TH ST South,Peck Community Bldg, 23.8 km south of the city (EPA site 20-191-0002).
Largest air release: Cargill Inc, 1425 N Mosely (food), inside the city limits, 437,400 lb in 2024.
Wichita's water supply emergency chapter runs in drought stages: at Stage 1 the city manager asks every customer for voluntary savings, and at Stage 2 the listed conservation measures become mandatory. Businesses that earn their living from outdoor water, such as car washes, nurseries and sod suppliers, are exempt at Stage 2.
Wichita Code §17.14.040: Stage 1 measures · Wichita Code §17.14.050: Stage 2 measures · checked September 2026
Wichita makes it unlawful to discharge sewage, industrial waste or waste water into any watercourse or storm sewer inside the city or its police jurisdiction unless the health department has issued a discharge permit. A crew's dirty rinse water falls under that wording, so it should be kept out of the street inlets.
Wichita Code §16.20.020: discharge permit required; materials which may be discharged · checked September 2026
No Wichita permit is issued for a project on a Wichita Register historic property, or on a building inside a Wichita Register historic district, until a Certificate of Appropriateness has been reviewed and approved. Depending on the work, preservation staff, the Historic Preservation Board or the City Council makes that call.
Wichita Code §2.12.1023: Certificate of Appropriateness review · checked September 2026
Ogallala and Dakota aquifer groundwater, with substantial calcium-carbonate and magnesium-bicarbonate fractions plus iron-and-manganese on some properties. Extended citric dwell (5-7 minutes) required. The single most useful chemistry adjustment is the extended pre-treatment.
Published and checkable: 150 mg/L as calcium carbonate, sampled 22 May 2023, in the city's standard secondary-contaminants table against a 400 mg/L secondary limit. That is the middle of the hard band, not the extreme the old 310 implied.
Residential window cleaning in Wichita typically runs $8–13 per pane or $240–400 for a standard single-story exterior. Wichita prices below the Johnson County market on the same glass because route density is looser and the stock is lower-rise.
Wichita's drier, frost-free months are April and August to October, by NOAA's 1991–2020 normals for the Wichita station, where May brings the most rain. The calendar on this page marks August (after the April 11 bloom) and October (after smoke season and before frost). Frost nights usually run from October 29 to April 11. Normal highs reach 90°F in July and August.
Not as the final rinse: City of Wichita publishes hardness of 150 mg/L, enough to spot as it dries, so finish with pure water. Its sodium, up to 140 mg/L, leaves a salt film that pulls moisture back, so rinse it off rather than let it dry. Treatment starts with pre-ozonation, rapid mix, coagulation and flocculation.
In Wichita the dominant residue patterns include mixed-salt film from 200 mg/l chloride and 140 mg/l sodium and sodium at 140 mg/l, above the 100 mg/l secondary standard. Two overlapping problems on different clocks. Salt and mineral film are constant and worst when water flashes off in heat, so avoid full sun from June through August.
Crown Heights and much of College Hill is genuinely DIY-friendly — the water spots rather than films, so a bucket, a decent squeegee and shade are enough. Eastborough should be hired out on pane count and height. The thing no homeowner should attempt is working at height on a 25 mph southerly day in May, which is exactly when the glass looks worst and the temptation is highest.
Established pre-war residential east of downtown with mature canopy. Shaded elevations hold organic film and dry slowly; the mineral spotting from a 150 mg/L supply is the lesser problem here. Riverside and Delano have their own housing stock and glazing as well.
Just over the Kansas line