Florida is divided into five water management districts, and the boundaries between them are not drawn by the districts. They are written into section 373.069(2) of the Florida Statutes, leg by leg, in townships, ranges and section lines. At Four Corners, three of those statutory descriptions converge on the same corner, and the effect is simple enough to state in one sentence: the district line here runs along the county line.
One caution before the table, and it is the thing that trips up every online answer to this question. Every one of these four counties is split between districts, so the rows below describe the four corners at the junction and nowhere else. Most of Orange County, including Winter Garden and Apopka, is St. Johns River territory under Chapter 40C, which is why our pages for those cities cite a different rulebook from the one below. Part of Lake County, well west of here, is Southwest Florida. Part of Polk is South Florida, and part of Osceola is St. Johns River. If your property is not at the junction, the table does not describe it.
Here is how it falls at the corner itself, and what each district had in force as this page was written in September 2026. Treat that third column as a snapshot and check the district's own page before you set a controller.
Shortage orders lift. What sits underneath them does not, and that is the part worth programming a controller around. Take the two corners we actually work in, Lake and Orange, and set the drought aside. South Florida's year-round rule, Chapter 40E-24, gives the Orange corner two irrigation days a week every week of the year, with nothing between 10:00 a.m. and 4:00 p.m. St. Johns River's Rule 40C-2.042 gives the Lake corner two days on daylight saving time and drops it to one day a week every winter, as a matter of ordinary rule and with no drought required. Two properties a mile apart, both on our list, and one of them loses half its irrigation days every November while the other does not.
That is the difference a controller gets wrong, year after year, on a property whose owner assumed Central Florida has one watering calendar. It does not. At this junction, it has three, and all three are within sight of each other.
One more permanent difference is worth knowing if a pond or retention basin is your source, and it runs the other way across the junction. Southwest Florida's Rule 40D-2.041(4)(d) requires an individual water use permit where the outside diameter of the withdrawal pipe, or the sum of the diameters, is four inches or greater. St. Johns River's Rule 40C-2.041(1)(e) sets the same trigger at six inches. So a five-inch intake on a pond needs an individual permit at the Polk corner but not at the Lake corner, where it falls under the district's general permit by rule. Same pipe, same pond, different county.
Each district publishes thresholds and schedules running to several pages, and this page does not try to reproduce them. Our Eustis page sets out the St. Johns River consumptive use permit thresholds in full, all five, with the domestic use definition and the rule on aggregating proximate properties. For a parcel at the Orange, Osceola or Polk corner, the governing district is not the one that page describes, and the district's own site is the place to check.