An owner's backyard pool has turned green. What should our HOA board do about it?

By OurHOA · General information · Revised November 11, 2026

What an HOA board does about a green or abandoned pool at an owner's home: health notice rules in TX, FL and CO, mosquito control, a letter and a timeline.

Part of the HOA board handbook: running the board.

The short answer

Handle a green pool as a public health problem first and a covenant problem second. Work in this order: confirm it without setting foot on the lot, report it to the county or city mosquito control or health office the same day, send the owner the health and safety notice your state allows, and only then ask whether the association's entry right reaches a fenced backyard. It usually doesn't. The public agency usually gets the water treated faster than the association can. The board keeps the record and bills only what the declaration allows. Rules vary by state and by your governing documents. This guide is general education, not legal advice, and a short call with the association's attorney before anyone goes through a locked gate is cheap insurance.

Why this one can't wait for the next meeting

The best field study comes from Bakersfield, California, after the 2007 mortgage crisis. Researchers working with the Kern Mosquito and Vector Control District sampled 31 neglected pools from February to August 2008 and raised 8,978 adult mosquitoes from them, mostly Culex species, the mosquitoes that carry West Nile virus. In one aerial photo of a typical neighborhood, about 17 percent of the 42 visible pools and hot tubs looked green. Locked fences slowed even the district's crews. The second risk is drowning. CDC reports that more children ages 1 to 4 die from drowning than from any other cause, and murky water hides a child at the bottom. A green pool behind a vacant house with a gate hanging open goes to the top of the list that day.

Confirm it without trespassing

Look from the street, a common area, or a neighbor's yard with that neighbor's permission. Nobody from the board opens a gate, climbs a fence or leans over a wall to get a better photo. - Take dated photos from the same spot each time, so the before and after pictures match. - Ask the neighbor who complained for a short written note. - Find out whether anyone lives there. The county appraisal district or property appraiser lists the owner's mailing address, and a recorded notice of default or lis pendens in the county records points to a foreclosure. - Look up the lender in the recorded deed of trust or mortgage. Many declarations let the association copy mortgagees on violation notices, and a lender about to own the house wants it fixed. An owner with a broken pump often fixes it within a week of a polite letter. An owner who walked away never reads it.

Report it to the public agency the same day

Texas. Health and Safety Code section 341.011(7) lists as a public health nuisance a collection of water where mosquitoes are breeding inside a city's limits, and water that is a breeding area for disease-carrying mosquitoes wherever it is. Under section 341.012, the local health authority orders abatement in writing within a reasonable time and refers an ignored order to the prosecutor. Call the city's code compliance line or the county health department and use the words 'mosquito breeding' in the report. Florida. Statutes section 386.041(1)(e) makes any condition capable of breeding mosquitoes that can transmit disease a sanitary nuisance injurious to health. The county mosquito control program and the county health department both take these reports. Colorado. Call the county public health agency or the city's code enforcement office and ask how it handles stagnant pools. Give the agency the address, your photos, whether the home looks vacant, whether the gate is secure, and whether children live next door. Write the case number in the violation file. An inspector can often get onto a lot when the HOA can't.

Send the owner the notice your state allows

Texas. Property Code section 209.006(a) requires written notice by certified mail before the association fines an owner or charges for property damage. The notice describes the violation, states any amount due, says the owner may request a hearing on or before the 30th day after mailing, and tells the owner they may have special rights under federal law, such as those for servicemembers on active duty. Under 209.006(b)(2)(A), the owner is owed a reasonable period to cure only when the violation is curable and does not pose a threat to public health or safety. A breeding pool may fit that exception, but don't lean on it alone. Skipping the cure period also affects the hearing right, because 209.007(a) gives a hearing only to an owner entitled to cure. A short cure period, such as 10 days, is easier to defend than none. Florida. Under section 720.305(2)(b), a fine needs at least 14 days' written notice of the owner's right to a hearing before a committee of at least three members who are not officers, directors or employees, or their relatives, and the hearing must happen within 90 days of the notice. Under (2)(e), a violation cured before the hearing or in the way the notice specified can't be fined. Fines top out at $100 per violation and $1,000 in total unless the governing documents say otherwise, and a fine under $1,000 can't become a lien. Colorado. Section 38-33.3-209.5(1.7)(b)(II) has a separate track for a violation the association reasonably determines threatens public safety or health. The written notice, in English and in any language the owner has asked for, gives 72 hours to cure. If an inspection after that shows no cure, the association may fine every other day and take legal action, but it may not foreclose over fines. An ordinary violation instead gets certified mail, a 30-day cure, a second 30-day cure before suit and a $500 cap on total fines, so write down why the board found a health threat before using the 72-hour track.

Can the association treat the pool itself

Only if the owner says yes or the declaration clearly lets the association enter that part of the lot. Most entry clauses were written for mowing front yards, and our guide on mowing or cleaning up a neglected lot and billing the owner covers how to read one. A fenced backyard is usually outside it. Without written consent or a clear clause, the remedy is a court order. In Texas, section 209.007(d) exempts a suit for a temporary restraining order or temporary injunction from the notice and hearing steps. When the owner consents, put it in writing with the gate code and a cost cap, and send the association's regular pool vendor. Two rules for that visit: - Larvicide first. EPA says Bti, the bacterium in most mosquito dunks, targets only the larvae of mosquitoes, blackflies and fungus gnats and has no toxicity to people. The vendor follows the label. - Never drain it. An empty in-ground pool can lift or crack when groundwater is high, and an empty hole at a vacant house is a worse fall hazard than a green one. Draining is the owner's decision, made with a pool contractor. No director or volunteer does this work, even with consent.

Wording the board can copy

Notice paragraph: 'The swimming pool at [address] contains standing green water. Standing water where mosquitoes breed is a public health nuisance under [state law], and it violates Article [__], section [__] of the declaration, which requires owners to maintain their lots in a safe and sanitary condition. The association has reported the condition to [agency], case [number]. Please restore the water to clear, treated condition, or cover or secure the pool, by [date]. If you would like the association's pool vendor to treat the water at your cost, sign and return the enclosed consent with your gate code.' Motion: 'Moved that the board finds the condition of the pool at [address] threatens public health and safety, directs the secretary to send notice under [statute and article], authorizes the president to consult the association's attorney on injunctive relief at a cost not to exceed $[amount], and directs that any treatment costs incurred with the owner's written consent be charged to the owner's account under Article [__].'

A sample timeline for a July complaint in Texas

- Day 0: A neighbor emails photos. A director confirms from the neighbor's yard and calls city code compliance and county mosquito control. Case number goes in the file. - Day 1: The 209.006 notice goes by certified mail with a 10-day cure date, plus copies by email and to the lender if the declaration allows. - Day 3 to 7: The county inspector visits and treats or posts a notice. - Day 12: A director rechecks from the same spot. - Day 14: If the water is still green and the owner hasn't answered, the board votes on the motion above at a noticed meeting and the attorney sends a demand letter. - Day 30 on: If the agency hasn't fixed it, the board decides on a suit for an injunction. In Colorado the same case moves faster, with 72-hour notice on day 1, inspection on day 4 or 5, then fines every other day.

Mistakes that make it worse

- Treating it as a looks issue with a 30-day letter, then waiting for the next meeting. - Going through the gate. A director who enters to toss in a dunk hands the owner a trespass claim. - Fining a Florida owner who fixed the pool before the hearing. Section 720.305(2)(e) bars it. - Forgetting to close the file. Once the water is clear, send written confirmation, which Colorado requires under 209.5(1.7)(b)(VI), and recheck in 30 days, because a pump that failed once will fail again. - Ignoring the common areas. Our guide on setting up an HOA mosquito control program covers the ponds, drains and pool house the association itself controls.

Sources

These guides are general education for HOA boards and residents, not legal, tax, or financial advice. Rules vary by state and by your community's governing documents - check with a professional for your situation.

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