Drawing irrigation water out of Lake Eustis or Lake Dora is a regulated withdrawal in the same way a well is, and the St. Johns River Water Management District applies one set of five thresholds to both. Three of them are about volume and equipment capacity and apply identically whichever way the water comes up. The other two are about size, and that is where the two arrangements part company.
Six inches is the figure in both, and it is measured in two different places. On a well, the rule looks at the outside diameter of the largest permanent water-bearing casing at the point where it leaves the ground. On a lake intake, it looks at the diameter at the end of the pump intake. Same number, different tape measure, and a system somebody sized decades ago may sit on either side of it. Crossing any one of the five is enough on its own, and where a particular withdrawal lands is the District's determination.
One further point catches people out. A withdrawal that stays under every threshold is still not unregulated. It is authorized by a general permit granted by the rule itself, with conditions attached, and which authorization applies to a given withdrawal is again the District's call.
The watering restrictions apply to lake water as well: the District's wording covers ground or surface water, private wells or pumps, and public or private utilities alike. As of early September 2026, the portion of Lake County inside the District is under a Phase III Extreme Water Shortage order allowing one irrigation day a week, Saturday for odd-numbered addresses, Sunday for even, and Tuesday for non-residential properties, with irrigation prohibited from 8:00 a.m. to 6:00 p.m. Orders change, so confirm the current position on the District's watering restrictions page.