If you own a pool in McKinney, Allen, Frisco, or anywhere else in Collin County, you already know that August is not the time to let your guard down. The heat is still relentless, kids are heading back to school, and your equipment has been running hard since May. What most North Texas homeowners do not realize is that August and early September are actually the most important weeks of the pool year for maintenance, not spring and not December.
Here is the key thing to understand about North Texas pool ownership: you are not closing your pool at the end of summer. This is not Minnesota or Ohio. A pool in McKinney is typically open and usable through October and often into November. October in North Texas regularly hits the mid-70s to low 80s, which is genuinely perfect outdoor weather. Pools see plenty of use for evening swims, weekend entertaining, and family time well into autumn.
What you are doing at the end of summer is transitioning your pool from peak-demand mode into a lower-intensity fall rhythm. That transition requires some deliberate attention. This checklist covers everything you need to do in August and September to protect your investment, keep your water safe, and set your pool up for the best possible fall season.
For ongoing care, our team provides professional pool maintenance throughout the North Texas area. But whether you handle this yourself or call in a pro, here is exactly what needs to happen.
1. Why August and September Matter More Than You Think
Your pool has been under enormous stress since Memorial Day weekend. Think about what it has endured: weeks of 100-degree temperatures, heavy bather loads from family and guests, intense UV radiation beating down on the water surface hour after hour, and your pump running 10 to 12 hours a day every single day.
That sustained stress shows up in predictable ways by late summer:
- Your cyanuric acid (stabilizer) levels have been depleted by months of UV exposure and backwashing
- Your filter has accumulated a season's worth of contaminants and may be operating at reduced efficiency
- Your pump motor and bearings have logged hundreds of hours and may be showing early signs of wear
- Calcium scale and organic staining may have built up on your tile line and water features
- Your water chemistry, even if it has been maintained weekly, may have drifted in ways that compound over time
Catching these issues in August means you can address them while the weather is favorable, pool contractors are available, and you still have two to three months of pool season ahead of you. Waiting until November means discovering problems after the fact, and often paying emergency rates to fix them.
Wondering how often your pool actually needs professional attention through the summer? Our post on how often to service your pool during Texas summer breaks it down by pool size, usage level, and time of year.
2. Complete Water Chemistry Audit
A standard weekly chlorine-and-pH check is not enough for an end-of-summer audit. You need to test all five core parameters and adjust accordingly as you shift into fall conditions.
pH
Target range: 7.2 to 7.6. pH is the master control for everything else in your pool. Low pH corrodes equipment and irritates skin. High pH reduces chlorine effectiveness and encourages scale formation. After a summer of heavy use and chemical additions, pH often ends up higher than ideal. Test it and adjust with muriatic acid if needed.
Total Alkalinity (TA)
Target range: 80 to 120 ppm. Total alkalinity is the buffer that keeps your pH stable. If TA is too low, your pH will swing wildly every time you add chemicals. If TA is too high, pH becomes stubbornly resistant to correction. Late summer is a good time to bring TA back into its optimal window before fall rains and cooler temperatures change the chemistry dynamics.
Calcium Hardness
Target range: 200 to 400 ppm for plaster pools. North Texas water is naturally hard, but heavy evaporation over summer can concentrate calcium to the point where scale forms on your tile, plaster, and equipment. Test calcium hardness and drain and refill a portion of the water if levels are significantly elevated. Do not ignore this: scale buildup on heater elements is one of the leading causes of premature heater failure in North Texas pools.
Cyanuric Acid (CYA / Stabilizer)
Target range: 30 to 50 ppm. This is the one that surprises most homeowners. Cyanuric acid is the sunscreen for your chlorine. It protects chlorine from being destroyed by UV radiation. Over a North Texas summer, with months of intense sun exposure and periodic backwashing that flushes water out of the pool, CYA levels drop considerably. By August, many pools are sitting at 15 to 20 ppm, which means your chlorine is burning off much faster than it should. Replenishing your stabilizer before fall is one of the highest-value things you can do at end of summer.
Free Chlorine
Target range: 1 to 3 ppm, or slightly higher during periods of heavy use. As bather load drops when kids go back to school, you will need less chlorine to maintain safe levels. Calibrate your chlorinator or adjust your tablet feeder accordingly so you are not over-treating a lightly-used pool, which wastes money and can drive CYA higher than ideal over time.
3. Full Equipment Inspection
End of summer is the right time for a thorough equipment check, not a spot inspection. Your pump, filter, heater, and automation system have all been working overtime since spring. Identifying a problem in August gives you time to schedule a repair before cooler weather when you actually want to use your heater.
Pump
Listen for unusual noise: grinding, squealing, or a high-pitched whine can indicate bearing wear. Check for vibration at the motor housing. Make sure your pump basket is clean and that water flow looks normal. A pump that has run 10-plus hours a day since May is a pump that may be showing the first signs of motor fatigue.
If your pump is more than seven years old or you are noticing higher electricity bills without an obvious reason, this is a good time to evaluate an upgrade. Our guide on when to repair or replace pool equipment covers exactly how to make that call. And if you are considering a variable speed pump, our post on variable speed pump savings explains the real-world impact on your electricity bill, which can be substantial in a state where pools run nearly year-round.
Filter
Check your filter pressure gauge. If it is running 8 to 10 psi above its clean starting pressure, it is time to backwash (for sand or DE filters) or clean the cartridges. A dirty filter at the start of fall leaf season is a real problem, because October in North Texas means trees dropping leaves directly into your pool, which creates a heavy debris load.
Heater
This one is particularly important for North Texas homeowners. Our real cold weather arrives in November and December, not September. But October evenings can drop into the 50s, and many families want to extend their swim season by heating the pool. If your heater has a problem, you want to find out in August when pool technicians have reasonable availability. Finding out in late October means waiting weeks for a repair and losing your whole extended swim season.
Run your heater in August and confirm it fires, reaches temperature, and shuts off cleanly. Check for any error codes on digital units. Inspect the heat exchanger venting for obstructions, especially if you have had any tree work done near the equipment pad this summer.
Automation and Controls
Review your automation settings for the transition to fall. Adjust your pump run schedule to reflect shorter daylight hours and lower water temperatures. Check that your freeze guard is enabled and set to the correct temperature threshold (typically 35 to 38 degrees Fahrenheit) so that your pump activates automatically if temperatures drop overnight. While hard freezes are uncommon in McKinney before December, they do happen, and an improperly configured freeze guard can result in cracked pipes and damaged equipment.
4. Tile and Surface Inspection
The end of summer is actually the best time of year to address cosmetic pool issues. Here is why: the days are still long and warm enough for chemical treatments to work effectively, but the brutal peak-of-summer heat has passed. Pool service technicians are more available in September than in June. And if you need any work done on the pool surface, getting it done before fall gives the plaster or finish time to cure before cooler temperatures arrive.
Calcium Scale on Tile
If you have a white, chalky buildup on your waterline tile, that is calcium carbonate scale, and it is extremely common in North Texas because of our naturally hard water. It is much easier to address this in September than in the middle of summer when your pool is in constant use. A professional tile cleaning or targeted acid wash at the waterline can remove scale effectively. Left untreated, calcium scale becomes significantly harder to remove as it mineralizes further over time.
Surface Cracks and Rough Spots
Walk the perimeter of your pool and check the plaster or pebble surface underwater at the steps, benches, and floor. Rough spots, pitting, or hairline cracks that started small in spring may have widened over summer due to chemical fluctuations. Small surface repairs are straightforward and inexpensive. Letting them develop through another season can lead to much larger replastering costs. If you spot significant issues, this is also a good time to explore equipment upgrades or surface renovation options before the next swim season.
5. Clean and Inspect Your Pool Cover
If you have a safety cover, automatic cover, or solar cover, August is the time to pull it out, clean it, and inspect it for damage. A cover that has been stored since spring may have mold or mildew from being stored slightly damp. Safety cover straps and anchors should be checked for wear before fall, when you may start using the cover more regularly to keep debris out and retain heat.
If you do not have a pool cover, our post on pool covers in Texas examines whether a cover makes sense for your specific situation. The calculus in North Texas is a bit different than in colder climates, because a cover that helps you retain heat in October and keep leaves out in November can pay for itself quickly. But it is not a one-size-fits-all answer.
6. Adjust Pump Run Time for Fall
During July and August, you likely need your pump running 10 to 12 hours per day to maintain adequate circulation in the intense Texas heat. As temperatures cool into September and October, you can scale back significantly.
A good starting point for fall in North Texas:
- September: 8 to 10 hours per day
- October: 6 to 8 hours per day
- November and December: 4 to 6 hours per day, with freeze guard override as needed
If you have a variable speed pump, this is where those energy savings really compound. Your pump can run at lower RPMs for longer periods during fall, consuming dramatically less power than a single-speed pump running at full blast. This is one of the reasons a variable speed upgrade pays back so quickly in Texas, where pools run 10 to 11 months out of the year.
7. Prepare for Fall Leaves
This catches North Texas homeowners off guard every year. October arrives, the weather becomes absolutely gorgeous, everyone is spending time outside and enjoying the pool, and then the trees start dropping leaves directly into the water.
Organic debris in a pool is not just a cosmetic issue. Leaves decompose and release tannins and phosphates that feed algae, consume chlorine, and stain your plaster. A heavy leaf load can push an otherwise balanced pool into a green or cloudy water situation within days.
Steps to prepare:
- Increase skimmer basket checks to every two or three days during peak leaf drop (typically mid-October through mid-November in Collin County)
- Consider investing in a leaf net or leaf trap that attaches to your skimmer line and catches leaves before they reach the pump basket
- If you have trees directly over your pool, a leaf cover net deployed on evenings and weekends can dramatically reduce cleanup time
- Keep a long-handled leaf rake on the pool deck for quick surface skimming
8. Schedule Any Equipment Repairs or Upgrades Now
This is genuinely good advice that most pool owners learn the hard way. Fall is the best time to schedule non-urgent pool work. Spring is when every homeowner in North Texas simultaneously realizes their pool needs attention before summer, and wait times for pool service can stretch to several weeks. Fall, by contrast, tends to have better contractor availability and sometimes better pricing on labor and equipment.
If your equipment inspection from item three above turned up anything questionable, call now rather than waiting. Schedule that heater tune-up, order that replacement filter cartridge, and get that leak looked at. The homeowners who enjoy trouble-free pools every spring and summer are the ones who handled their maintenance in the fall.
9. Adjusting for Lower Bather Load as Kids Go Back to School
Bather load is one of the biggest drivers of chemical consumption in a residential pool. Sunscreen, body oils, sweat, and the physical agitation of swimming all consume chlorine and affect water chemistry. A pool that saw six kids in it every afternoon from June through August may see that same pool used three or four times a week by adults in September and October.
That reduced bather load has direct implications for your chemical routine:
- Reduce your chlorine dose and check levels weekly rather than multiple times per week
- Extend the interval between shock treatments if your water is staying clear
- Continue testing all five parameters monthly through fall, even if the pool looks perfect
- Do not turn off your automatic feeder entirely just because it is less hot. The pool still needs steady sanitation.
10. What North Texas Pool Winterization Actually Looks Like
Here is where North Texas pool care is fundamentally different from what you might read on national pool care websites written for audiences in Pennsylvania or Illinois. You are almost certainly not doing a full winterization in the traditional sense.
True pool winterization, where you blow out the lines, plug the returns, lower the water level, and close the pool entirely, is rarely necessary in the DFW area. Our winters are too mild and too short for that approach to make sense. Most McKinney and Collin County pools keep circulating water all winter long.
What North Texas pool "winterization" actually involves:
- Verify freeze guard is active and properly set. This is the single most important step. Your freeze guard should be set to activate your pump when temperatures drop to around 35 to 38 degrees Fahrenheit. This keeps water moving through the lines so it cannot freeze.
- Reduce chemical additions. Cooler water holds chlorine longer, so you do not need to dose as heavily. Monthly testing and minimal adjustments are usually sufficient from December through February.
- Protect exposed equipment. If you have exposed copper or plastic pipes near the equipment pad, cover them with foam pipe insulation before the first freeze. This is inexpensive and fast.
- Do not drain the pool. An empty pool in Texas can pop out of the ground due to hydrostatic pressure from the surrounding soil, particularly after rain. Unless a professional has specifically told you to drain for repairs, keep water in the pool year-round.
- Keep the pump running during freezes. On nights when temperatures are forecast to drop below 35 degrees, your freeze guard should handle this automatically. But if you do not have an automation system, manually set your pump to run continuously until the temperature rises.
The goal for a North Texas pool through winter is steady, low-effort maintenance: keep the water moving, keep the chemistry from getting completely out of balance, and protect the equipment from the rare hard freeze. That is it.
11. Schedule a Professional End-of-Summer Inspection
Even the most diligent DIY pool owner benefits from having a professional set of eyes on the pool and equipment once or twice a year. An end-of-summer inspection is one of those times. A trained technician will catch things that are easy to overlook: early-stage equipment wear, minor leaks in the plumbing, developing calcium scale in the filter or heater, and water chemistry issues that standard test strips do not capture accurately.
Our team at El Dorado Pools performs comprehensive end-of-season inspections that cover water chemistry, equipment function, plumbing integrity, and surface condition. We serve McKinney, Allen, Frisco, Prosper, Celina, and communities throughout Collin County. An inspection in August or September gives you a clear picture of where your pool stands and exactly what, if anything, needs attention before fall.
Frequently Asked Questions
Do I need to close my pool for winter in North Texas?
No. Full pool closure is not necessary or recommended for most McKinney and DFW-area pools. North Texas winters are generally mild enough that you can and should keep the pool circulating all year. The key step is making sure your freeze guard is properly configured so the pump automatically runs during cold snaps.
How long is the pool season in North Texas?
A North Texas pool is typically usable from April through October and sometimes into November. October is genuinely excellent outdoor weather in Collin County, with highs in the 70s and 80s. Many families with heated pools extend their season into November and even December on warm days.
Why does my stabilizer keep getting low?
Cyanuric acid (stabilizer or CYA) is depleted by UV radiation over time, and it also exits the pool whenever you backwash or splash water out. After a full North Texas summer, most pools need stabilizer replenished. The end-of-summer chemistry audit is the right time to bring it back to the 30 to 50 ppm range.
Can leaves in the pool really cause algae?
Yes. Decomposing organic matter releases phosphates, which are a primary food source for algae. A pool that accumulates leaves without prompt removal will typically see chlorine consumption spike and algae begin to develop within days to a week. This is why increased skimmer checks during October leaf-drop season are important for North Texas pools.
How many hours should my pump run in September and October?
As temperatures cool, you can reduce pump run time from the summer peak of 10 to 12 hours. A reasonable fall schedule for North Texas is 8 to 10 hours in September and 6 to 8 hours in October. If you have a variable speed pump, you can run it at lower RPMs for longer periods and achieve good circulation at lower cost.
When should I test my pool heater before fall?
The ideal time is August, while pool technicians are still readily available. You want to confirm your heater fires correctly and reaches temperature well before October evenings get cool enough that you actually need it. A heater problem discovered in late October can mean a two to three week wait for a repair appointment during a busy season for pool service companies.
What is the white buildup on my pool tile?
That is almost certainly calcium carbonate scale, which is extremely common in North Texas because our tap water is naturally hard. It forms at the waterline where water evaporates and leaves minerals behind. It is much easier to remove when it is fresh than after it has hardened over months. A professional tile cleaning in August or September is far less involved than addressing a full season of accumulated scale in spring.
Ready for a Professional End-of-Summer Pool Checkup?
El Dorado Pools has been serving homeowners in McKinney, Allen, Frisco, Prosper, Celina, and throughout Collin County for over 18 years. We know North Texas pools and North Texas weather, and we know exactly what your pool needs as summer winds down and fall begins.
Whether you need a comprehensive end-of-summer inspection, help getting your water chemistry dialed in, a heater check before cooler weather arrives, or ongoing professional pool maintenance through the fall season, our team is here to help.
Call us at (214) 945-6000 or contact us online to schedule your end-of-summer pool service. Your pool has two to three good months of swim season left. Let's make sure it is ready for all of them.