Savannah's Historic District riverfront glass collects brackish salt aerosol off the tidal river, and March to April pine pollen coats the rest.
Savannah blends Floridan Aquifer groundwater with river water at peak demand and publishes no hardness figure, so dry glass promptly and let the results guide you. Historic District riverfront glass collects brackish salt off the tidal river and pine pollen coats the rest in early spring; March to May and October to November are the best months. Preservation rules and tourist footfall set the top of the market, while a typical single-story exterior runs $280 to $480.
Savannah is on the coastal-plain side of Georgia's split, drawing Floridan Aquifer limestone groundwater with Savannah River surface water blended in at peak demand. That makes it genuinely hard in direction, unlike the Piedmont cities upstate, and a blend besides — so what reaches a tap depends partly on demand. The utility publishes no figure, and the one quoted online contradicts its own band label.
Figures by zone, as reported.
| Hardness | not published Savannah Water Department publishes no hardness figure in its 2026 Water Quality Report for the Savannah Main System, PWS GA0510003 (savannahwaterquality.com). |
|---|---|
| Manganese | 0.011 mg/L (range 0.008–0.011) |
| Disinfectant | chloramine |
| Source and treatment | Mostly groundwater from the Floridan Aquifer, blended with Abercorn Creek surface water, which was 22 percent of supply in 2025 and is rising as demand grows and the aquifer is protected from saltwater intrusion · Groundwater takes disinfectant and fluoride only. Surface water is coagulated with alum and polymer, settled, filtered, disinfected with chlorine and ammonia, then balanced for pH and corrosiveness with lime and phosphate · No softening step. |
Not in the report: pH, alkalinity, corrosion index, iron, sodium, chloride and total dissolved solids.
SOURCE · City of Savannah 2026 Water Quality Report for the Savannah Main System, PWS GA0510003 · How we source these numbers
The riverfront runs on brackish exposure rather than on season. Tidal river water this close to the ocean carries salt, and the Historic District's riverfront glass takes it year-round rather than in a coastal strip. Inland, the pine wave in March and April lays the same yellow film the rest of the region gets, and humidity keeps shaded elevations holding mildew almost continuously.
GEORGIA SEASON BY SEASON →Savannah draws Floridan Aquifer groundwater blended with Savannah River surface water at peak demand and publishes no hardness figure; the one figure quoted online contradicts itself. This is the coastal-plain half of Georgia's split — hard here, soft upstate, with the fall line a real boundary. Pre-1850 colonial glass under preservation control is the most fragile inventory in the region, and the tidal riverfront takes brackish salt year-round rather than seasonally.
Savannah draws Floridan Aquifer groundwater with Savannah River surface water blended in at peak demand, and the city's 2026 water quality report prints no hardness figure. The only number quoted online, 8.7 grains per gallon, comes from a site that calls the water a different band on another page.
This is the coastal-plain half of Georgia. Atlanta, Columbus and Athens sit on Piedmont crystalline rock and run soft; Savannah sits over limestone and runs hard. The fall line between them is a genuine boundary and no figure crosses it.
The riverfront is brackish rather than merely coastal. The Savannah River is tidal this close to the ocean, so Historic District glass facing the water takes salt exposure year-round rather than seasonally, and needs a salt-clearing routine rather than a wipe.
Pre-1850 colonial glass in the Historic District is the most fragile inventory in the region. It predates float manufacturing, sits unevenly in original sash, cannot be replaced like for like, and sits under preservation control that restricts method as well as materials.
The pine wave in March and April lays the same yellow film over Savannah as the rest of the Southeast, and because the Historic District's squares are heavily planted, the load lingers in the shaded areas long after the open streets have cleared.
Tourism sets the presentation standard rather than maintenance does. Hospitality and retail frontage in the Historic District is cleaned to a visitor-facing standard on a short interval, with access scheduled around footfall rather than around the working day.
Preservation control and tourism together set the top of the market. Historic District work carries method restrictions, access constraints around visitor footfall and a presentation standard driven by hospitality rather than maintenance. Salt exposure on the riverfront drives frequency on top of that, and the two combine to support rates a city of this size would not otherwise sustain.
The Historic District is the reason this is specialist work and it is not a close call. Pre-1850 colonial glass sits in original sash on buildings under preservation control — the most fragile inventory in the region. No scrapers, gentle pressure, pure-water systems, and a working knowledge of what the district will and will not permit. That is a trade, not a weekend.
OPEN COST ESTIMATOR →2025 annual mean at the Savannah-L&A monitor, Pumping Station @ Intersection of W. Lathrop and Augusta AVE, Savannah, GA, 31415, 10.2 km north-east of the city (EPA site 13-051-1002).
Largest air release: International Paper Co - Savannah Complex, 1201 W Lathrop AVE (paper), 0.2 km outside the city limits, 847,010 lb in 2024.
Nobody may turn water on or off in Savannah's city pipes or mains without a permit or authority from the city, and supply can be withheld from premises that break the water rules. During emergencies the city manager can impose outdoor water-use limits, following state recommendations, announced through the media and the city's legal organ.
Savannah Code Sec. 5-1005: turning on or shutting off water generally · Savannah Code Sec. 5-1031: emergency restrictions of service · checked September 2026
Savannah's stormwater chapter bars anyone from discharging, spilling or dumping anything that is not stormwater, or an exempted flow, into the city's separate storm system, or onto driveways, sidewalks, parking lots and streets that drain into it; tampering with inlets or other stormwater structures is unlawful as well, so rinse water must be kept off paved areas that run to a drain.
Savannah Code Sec. 4-11005: restrictions and limitations on use of the city stormwater system · checked September 2026
In the Savannah Downtown Historic Overlay District, a certificate of appropriateness is required for any material change to a building's exterior appearance, including any alteration, and for changes to contributing resources and exterior color; the Historic District Board of Review or planning director judges the work against the Secretary of the Interior's standards and the district design standards.
Savannah Zoning Ordinance Sec. 3.19.2 and 7.8.7, as set out in City Council Ordinance File No. 23-005697-ZA · checked September 2026
Yellow film coats south- and west-facing windows across the metro. Functionally a thin organic coating, not a deposit — handle wet, never scrape dry. A single normal wash plus a strip-and-go rinse handles it on most stock. Heavy applications may need two passes.
Heavier where the canopy is older — Druid Hills, Inman Park, Athens, Decatur. Streakier than pine pollen, more likely to dry-bond if left through a hot afternoon.
Lower-sash problem on any house with exposed red clay within ten feet of the foundation. Sets within a week if not addressed. Acid-soluble — vinegar 1:1 with water handles fresh stains, citric or oxalic for set stains.
Savannah, Tybee, St. Simons, Jekyll. Sea-facing exposures build a salt film that wants a pre-rinse with fresh water before any soap touches the glass. Iron from irrigation overspray adds the orange lower-sash stain.
Savannah is on the coastal-plain side of Georgia's split, drawing Floridan Aquifer limestone groundwater with Savannah River surface water blended in at peak demand. That makes it genuinely hard in direction, unlike the Piedmont cities upstate, and a blend besides — so what reaches a tap depends partly on demand.
Residential window cleaning in Savannah typically runs $9–14 per pane or $280–480 for a standard single-story exterior. Preservation control and tourism together set the top of the market.
Savannah's drier, frost-free months are March to May and October and November, by NOAA's 1991–2020 normals for the Savannah International Airport station. The calendar on this page marks March (after the February 24 bloom), October (after smoke season) and November (before frost). Frost nights usually run from November 30 to March 2. Normal highs reach 90°F in June to August.
Savannah Water Department publishes neither hardness nor dissolved solids, so rinse one pane and let it dry in sun; a white ring means switch to pure water. Iron, manganese, sodium and chloride all sit under this site's flags (highest: manganese up to 0.011 mg/L). It draws on mostly groundwater from the Floridan Aquifer.
In Savannah the dominant residue patterns include brackish tidal-river salt aerosol on historic district riverfront glass and pine pollen yellow film, march to april. The riverfront runs on brackish exposure rather than on season.
The Historic District is the reason this is specialist work and it is not a close call. Pre-1850 colonial glass sits in original sash on buildings under preservation control — the most fragile inventory in the region. No scrapers, gentle pressure, pure-water systems, and a working knowledge of what the district will and will not permit. That is a trade, not a weekend.
Pre-1850 dense brick row residential and commercial; substantial original wavy-glass retention. Ardsley Park and Tybee Island (adjacent) have their own housing stock and glazing as well.
Just over the Georgia line