Montgomery publishes hardness from 4 to 115 mg/L, but long humid summers bring the real work: mildew film, and honeydew and tannin under heavy canopy.
Montgomery's water averages soft across its treatment plants, though some run moderately hard, so the tap is rarely the problem; long humid summers are, with mildew film and honeydew and tannin under heavy canopy. The spring months of April and May and the autumn months of September and October are the best times to wash. Humidity means a building loses its clean faster than a quote assumes, so plan return visits; a single-story exterior runs $240 to $430.
The board's 2026 report gives hardness averaging 41 mg/L, with a range of 4 to 115 across its treatment plants: soft on average, but not uniformly. So the average is a fair guide for most addresses, and the range shows why some glass still spots. In practice mineral residue is not what fails a job here. Organic film is, and it returns at a rate set by humidity rather than by chemistry.
| Hardness | 4–115 mg/L as CaCO₃ System average 41 mg/L across the Tallapoosa River surface plants and the west and southwest well-field plants, range 4 to 115; soft on average on the USGS ladder, as published by Montgomery Water Works and Sanitary Sewer Board. |
|---|---|
| pH | 7.9 (range 7–8.8) |
| Alkalinity | 121 mg/L as CaCO₃ (range 39–199) |
| Iron | 0–0.132 mg/L |
| Manganese | 0.001–0.027 mg/L |
| Sodium | 50 mg/L (range 8–100) |
| Chloride | 7–23 mg/L |
| Total dissolved solids | 110–281 mg/L |
| Disinfectant | free chlorine |
| Source and treatment | Surface water, per the EPA SDWIS federal record · Permanganate, powdered activated carbon, coagulation, pre pH adjustment, flocculation, sedimentation, rapid sand filtration, chlorine dioxide, chlorination and fluoridation, with an orthophosphate inhibitor, post pH adjustment and sequestration for corrosion control · No softening step. |
Not in the report: corrosion index.
SOURCE · Montgomery Water Works and Sanitary Sewer Board 2026 Water Quality Report (2025 data), as reprinted by Maxwell AFB, with the EPA SDWIS federal treatment record · How we source these numbers
Humidity governs almost the whole year. From March into November shaded elevations rarely dry properly, so mildew and organic film are continuous rather than seasonal and north-facing glass needs roughly double the frequency of the sunny side. The spring pollen fortnight is dead time and the service after it clears is the heaviest of the year. The mild winter makes this close to a year-round working market, which is the compensation.
ALABAMA SEASON BY SEASON →Montgomery blends river water with groundwater, so the chemistry depends on the mix. The board reports hardness averaging 41 mg/L (4 to 115) across its plants, soft on average. Figures quoted online for Alabama cities are often unreliable. The work here is organic: long humid summers, very heavy canopy, and an air base laying oily particulate over a wide area.
Montgomery's supply combines river water with groundwater, so the delivered chemistry depends on the mix rather than on a single source.
The water board's 2026 report puts system hardness at an average of 41 milligrams per litre, ranging from 4 to 115 across its river and well-field plants.
Four Alabama cities have already failed to yield an operator figure despite direct attempts, which is a strong enough pattern to suggest the format rather than the cities is the obstacle.
The sensible first move for any Alabama city is therefore to read the state's reporting format once, and this record is left open rather than filled with a guess.
Across Alabama, figures quoted online are unreliable: one site gives six different figures for Birmingham, from 4.2 to 15.2 grains per gallon.
None of those figures is used here.
What is certain is the climate, and it is among the most demanding on this site for organic soiling. Long humid summers keep shaded elevations damp for months at a time.
Mildew and organic film establish in frames and glazing channels as a matter of routine rather than as an occasional complaint, and north-facing glass needs roughly twice the frequency of the sunny side.
The canopy compounds it. Old Cloverdale and the Garden District sit under mature planting dense enough to produce honeydew, leaf tannin and continuous drip on the glass beneath.
Pine and oak pollen through spring is heavy enough that there is no point servicing residential glass in the middle of it, and the reset afterwards is the heaviest visit of the year.
Aircraft operations from the air base put an oily exhaust particulate over a wide area, and that film resists a plain-water method in a way ordinary dust does not.
The historic fabric downtown carries genuine national significance, which raises the care threshold on work that would be routine elsewhere and makes era identification a working skill.
Return frequency driven by humidity is the input most often underestimated here, because a building does not hold its condition through an Alabama summer the way a quote assumes. Canopy and pane count price Old Cloverdale and the Garden District well above their glass area. Institutional and base-adjacent work prices on access and clearance. The eastern commercial corridors price on route density and are the efficient end of the book.
Ordinary residential glass is manageable through most of the year and the supply is unlikely to be the obstacle. Two problems here are worth handing over. Honeydew under the canopy districts is sticky, re-wets and needs detergent and dwell time rather than pressure. And aircraft film near the base is oily — a standard cleaner moves it around and a dry cloth sets it. The historic downtown fabric is nationally significant and should be handled by someone who can identify the era.
OPEN COST ESTIMATOR →2025 annual mean at the Moms, Adem monitor, 1350 Coliseum Blvd, Montgomery, Alabama, 7.2 km north of the city (EPA site 01-101-1002).
Largest air release: Hyundai Motor Manufacturing Alabama LLC, 700 Hyundai Blvd (transportation equipment), inside the city limits, 71,336 lb in 2024.
Montgomery's fire code keeps the city's hydrants for the fire department alone: nobody else may open one or draw from it unless the superintendent of waterworks has given written permission first. A crew that wants to top up a water-fed pole tank from a street hydrant needs that letter in hand; otherwise fill from the customer's own spigot.
Montgomery Code §13-7: who may use the city's fire hydrants · checked September 2026
Montgomery's code makes it an offense to spill, dump, drain or otherwise dispose of pollutants, or water containing them, into its storm drains or watercourses, with only listed exceptions. Window crews should contain soapy runoff instead of letting it reach a street inlet.
Montgomery City Code §12-205: prohibitions of illicit discharges and connections · checked September 2026
In Montgomery, no change may be made to the exterior appearance of a historic property, or of any building, structure or site in a historic district, unless a certificate of appropriateness has been approved first. The code also provides an expedited procedure for some applications.
Montgomery City Code §15-126: certificate of appropriateness prerequisite to changes · checked September 2026
Heaviest pollen-deposition state alongside Georgia and South Carolina. Three to four week yellow film deposition. Wet-only handling. Do not scrape. Do not dry-brush. Pollen lifts cleanly with water plus light alkaline soap.
The board's 2026 report gives hardness averaging 41 mg/L, with a range of 4 to 115 across its treatment plants: soft on average, but not uniformly. So the average is a fair guide for most addresses, and the range shows why some glass still spots.
Residential window cleaning in Montgomery typically runs $8–13 per pane or $240–430 for a standard single-story exterior. Return frequency driven by humidity is the input most often underestimated here, because a building does not hold its condition through an Alabama summer the way a quote assumes.
Montgomery's drier, frost-free months are April and May and September and October, by NOAA's 1991–2020 normals for the Montgomery Airport station, where July brings the most rain. The calendar on this page marks April (after the March 4 bloom), September (after smoke season) and October (before frost). Frost nights usually run from November 13 to March 13.
Yes, if the rinse is squeegeed off before it dries: Montgomery Water Works and Sanitary Sewer Board publishes dissolved solids of 110–281 mg/L, between this site's two dissolved-solids flags. Treatment starts with permanganate, powdered activated carbon, coagulation and pre pH adjustment.
In Montgomery the dominant residue patterns include mildew and organic film through long humid summers and honeydew and tannin under very heavy mature canopy. Humidity governs almost the whole year.
Ordinary residential glass is manageable through most of the year and the supply is unlikely to be the obstacle. Two problems here are worth handing over. Honeydew under the canopy districts is sticky, re-wets and needs detergent and dwell time rather than pressure. And aircraft film near the base is oily — a standard cleaner moves it around and a dry cloth sets it.
The civic core running from the capitol to the river, with buildings of genuine national historical significance alongside commercial stock. Institutional scheduling, conservation handling and arranged access. Old Cloverdale and The Garden District have their own housing stock and glazing as well.
Just over the Alabama line