South Florida Watering Restrictions 2026: Rules, Rain Sensors & Leaks

Every summer we get the same call: "My water bill doubled and I haven't changed anything." Almost always, the culprit is outside the house — the irrigation system. South Florida's rainy season runs June through September and delivers more than half the year's rainfall, yet that's exactly when water bills spike. Part of it is people watering against the rules; a bigger part is sprinkler systems quietly leaking underground. Here's what the 2026 watering rules actually require, the rain-sensor law nearly everyone overlooks, and how to catch a leak before it costs you.

The year-round rules: when you can actually water

The South Florida Water Management District (SFWMD) sets mandatory, year-round landscape irrigation rules across all 16 counties it covers — including Miami-Dade, Broward, and Palm Beach. These aren't drought-only restrictions that come and go; they apply every week of every year. Most cities in the tri-county area follow the two-day-per-week schedule:

• Odd-numbered addresses: water on Wednesday and/or Saturday.
• Even-numbered addresses (and addresses with no number): water on Thursday and/or Sunday.
• No landscape irrigation between 10:00 a.m. and 4:00 p.m. on any day — that's when evaporation wastes the most water.
• Homeowner-association and other common areas are often assigned Tuesday and/or Friday so they don't compete with residential days.

Florida law requires a rain sensor on your sprinkler system

This is the one almost nobody knows about. Under Florida Statute 373.62, any automatic lawn-sprinkler system must have a working device that shuts the system off when it's already rained enough. The requirement has applied to new installations since 1991, and as of July 1, 2009 it applies to all automatic irrigation systems regardless of age. In practice that means a rain sensor, a soil-moisture sensor, or an evapotranspiration ("smart") controller that skips a cycle after a storm.

Why your water bill spikes in summer (it's usually the irrigation)

It feels backwards: it rains nearly every afternoon, but the bill goes up. The reason is that irrigation is the single biggest variable on a South Florida water bill, and summer is when a buried leak does the most damage. A cracked lateral line, a chewed-through drip fitting, or a valve that won't fully close can leak continuously — and because it's underground, you never see it. A leak losing even one gallon a minute runs about 1,400 gallons a day. That's how a bill doubles "for no reason."

Common signs of an irrigation leak we're called out for:

• A soggy, spongy, or unusually green patch of lawn that never dries out — even on a day the zone didn't run.
• A hissing or running-water sound near a valve box when everything is supposedly off.
• Water bubbling up at a sprinkler head or pooling along a flowerbed edge.
• A water bill that jumps in the irrigation-heavy months with no change in household use.
• A drop in indoor water pressure when an irrigation zone kicks on.

How to check: the five-minute meter test

1. Turn off every water-using fixture in the house and shut the irrigation controller to OFF.
2. Find your water meter (usually in a box near the street) and note the position of the sweep hand or the leak-indicator triangle.
3. Wait 10–15 minutes with everything off. If the meter still moves, you have a leak somewhere on the property.
4. Now run each irrigation zone one at a time and walk it. The zone where the meter spins faster than the heads can explain — or where water surfaces — is your leak.

If the meter moves with everything off and the irrigation valves shut, the leak may be on the main service line or a slab line inside the house, not the sprinklers — and that's worth a same-day look. Either way, we can isolate it. Call us at 754-707-1774 and we'll trace it instead of guessing.

The backflow preventer: the part homeowners forget

Here's the plumbing piece most lawn companies won't touch. If your irrigation system is fed from the same line as your drinking water — which most are — Florida code requires a backflow prevention device to keep fertilizer, pesticide, and standing sprinkler water from being siphoned back into your potable supply during a pressure drop. That device is a real plumbing fixture: it can stick, corrode, freeze on a rare cold snap, or fail its internal checks. Many utilities require periodic testing on these by a certified tester. This is licensed plumbing work, not a handyman job, and it's exactly the kind of thing we handle.

For HOAs, condos, and property managers

Large communities feel all of this at scale. A single community can run dozens of zones off a shared meter, and a buried leak there isn't hundreds of gallons a day — it's thousands, billed straight to the association. Common areas are typically assigned Tuesday and/or Friday under SFWMD rules, and the same rain-sensor and backflow requirements apply to commercial and common-area systems. We work with HOA boards and property managers across Miami-Dade, Broward, and Palm Beach to audit irrigation tie-ins, test and certify backflow assemblies, and chase down the leaks that show up as a mysterious spike on the master water account.

Bottom line: South Florida's watering rules are stricter and more permanent than most homeowners realize, and the rainy season is when an unnoticed sprinkler leak does the most financial damage. If your bill has jumped, your sprinklers run in the rain, or you're not sure your backflow device is up to code, we'll find the problem and fix it right. Call South FL Emergency Plumber at 754-707-1774 — we cover all three counties.