Storms—whether they’re mild thunderstorms or full-force hurricanes—can wreak havoc on your swimming pool. From debris contamination to chemical imbalances and structural damage, your pool is vulnerable to various issues that require immediate and thorough attention. Knowing how to treat your pool after a storm is essential for restoring it to a clean, safe, and functional state.
In this comprehensive guide, we’ll walk you through the key steps, tools, and best practices for recovering your pool after storm damage. Whether you’re a seasoned pool owner or new to pool maintenance, this guide equips you with the knowledge needed to bring your pool back to life quickly and safely.
Step 1: Assess the Extent of Damage Safely
Before diving into the cleaning process, it’s crucial to evaluate your pool and the surrounding area for signs of damage. Safety comes first—especially if the storm was severe.
Do Not Enter the Pool Until It’s Declared Safe
Electrical hazards, structural damage, or residual contaminants could make entering the pool dangerous. Begin by visually inspecting for:
- Cracks in the pool deck or walls
- Displaced tiles or coping
- Malfunctioning equipment (pump, filter, chlorinator)
- Standing water around the pool that may contain electrical cables
- Loose or broken ladders, light fixtures, or diving boards
Check for Fallen Trees or Large Debris
If any large debris like branches or tree limbs have fallen into the pool, do not attempt to remove them manually without proper lifting equipment or assistance. Heavy objects can sink and scratch the pool’s surface, and some may float unpredictably.
Ensure Electricity is Off
If the pool’s power system was submerged or compromised in the storm, switch off the breaker or fuse at the main electrical panel. This helps prevent electrocution and protects equipment from damage when power is restored.
Step 2: Remove Surface and Submerged Debris
Debris like leaves, sticks, dirt, and even small animals can significantly reduce water quality after a storm.
Use a Skimmer and Pool Net
Start by skimming large debris off the surface with a leaf net or skimming tool. This prevents contaminants from sinking and making the water more turbid. Follow up by walking the perimeter and removing smaller debris clinging to the pool walls early in the recovery process.
Use a Pool Vacuum for Ground-Level Debris
A manual or automatic pool vacuum can help retrieve heavy particles, mud, and silt from the bottom. Do not use a standard household vacuum cleaner, as it may get damaged or pose a safety hazard near water.
Protect the Pool Liner or Surface
For vinyl or fiberglass pools, use soft brushes or vacuums with non-abrasive heads to avoid scratches. This is especially important if the pool has already sustained debris abrasion.
Step 3: Test Water Quality and Restore Chemical Balance
Storms can significantly disrupt the pool’s chemistry due to dilution, debris contamination, or surface runoff.
Test pH and Chlorine Levels
Use a pool test kit (either liquid reagent-based or digital) to check the levels. Ideal chemical ranges are:
| Chemical | Ideal Range |
|---|---|
| pH | 7.4 – 7.6 |
| Free Chlorine | 1 – 3 ppm |
| Total Alkalinity | 80 – 120 ppm |
| Cyanuric Acid (Stabilizer) | 30 – 50 ppm |
Correct Imbalances Step-by-Step
If the pH is off, add pH increaser (sodium carbonate) or pH decreaser (sodium bisulfate), depending on results. Chlorine may be entirely neutralized by debris and will need to be boosted gradually.
Shock the Pool if Necessary
Pool shock increases the available chlorine to destroy contaminants introduced during the storm. Use a calcium hypochlorite or dichlor shock formula, and always follow manufacturer instructions based on your pool’s volume. Do not swim until chlorine levels return to the recommended range of 1 – 3 ppm.
Step 4: Run the Filter System to Circulate and Clean the Water
Clearing storm-affected pool water requires thorough filtration.
Inspect the Filter for Clogging or Damage
Heavy debris can clog sand, DE (diatomaceous earth), or cartridge filters. Clean or replace filter media if necessary before starting operation.
Set the Filter to “Waste” Mode Initially
This setting allows heavily contaminated water to bypass the filter and drain directly out. Use this for the first few hours or before reintroducing filtration chemicals.
Backwash or Clean the Filter as Needed
For sand filters, backwash at least twice a day until the water clears. Cartridge filters will need to be manually removed and rinsed. DE filters refill with fresh DE as the system demands.
Allow Continuous Running for 24–48 Hours
In extreme cases, let the filter run for up to one or two full days without interruption. Constant water circulation helps speed up the clearing process, filters out suspended particles, and distributes added chemicals evenly.
Step 5: Inspect and Repair Equipment
Storms may have disrupted power supplies, caused physical damage to equipment, or introduced water into electrical components.
Check the Pump for Air Locks or Blockages
Air locks can cause the pump to run without water flow, which can permanently damage motor seals. Clear them by following the pump manual to bleed the system.
Drain and Dry Wet Electrical Components
Pumps, timers, and light fixtures that were exposed to stormwater must be professionally inspected before reuse. Moisture can cause corrosion and electrical shorts.
Replace Burned-Out Circuit Breakers or Fuses
If the pool system does not power on after electricity is restored, consult a licensed electrician or pool service technician.
Step 6: Deep Clean and Disinfect Surfaces
The combination of dirt, storm runoff, and algae growth can leave behind stubborn stains or slippery coatings on the walls and floor.
Use a Pool Brush to Scour Surfaces
Use a stiff brush appropriate for your pool type. For tile finishes, consider using tile-specific brushes and cleaners to avoid damaging glazes.
Apply Algaecide After Brushing
Brush away existing algae mats first, then add a quality algaecide to prevent further growth. Some algaecides require non-metallic formulas to avoid discoloration in vinyl or fiberglass pools.
Combine Brushing and Vacuuming
Frequent brushes followed by vacuuming will prevent algae from reattaching. This ensures water flow doesn’t reintroduce free-flowing contaminants into the pool.
Step 7: Monitor and Continue Maintenance
After storm cleanup, the pool needs consistent follow-up to stay in top condition.
Continue Testing Water Daily
Chemical fluctuations often happen for a few days even after storm recovery treatments. Use a good test kit or bring a sample to a professional pool shop for analysis.
Refill Water if Necessary
Storm runoff may increase the pool volume, but evaporation or backwashing could drain it. Top off the water level if it drops more than a third on the skimmer opening.
Rebalance Weekly, Especially After Rain Events
Even smaller rainstorms following the initial storm can impact pool chemistry. Set up a calendar-based maintenance schedule to avoid recurring imbalance.
Common Post-Storm Pool Problems and Solutions
Despite best efforts, pool owners may encounter recurring issues even after following the proper recovery steps.
Cloudy or Murky Water
Cloudy water usually means you’re dealing with fine particulates not fully captured during filtration. To correct this:
- Use a clarifier or flocculant
- Run the filter for extended periods
- Avoid excessive backwashing during this time
Algae Blooms
If green, yellow, or black algae reappear, escalate your efforts:
- Increase brushing frequency
- Add algaecide and shock simultaneously
- Check for shaded spots or circulation dead zones
- Prevent recurrence by maintaining chlorine levels above 1 ppm
Stains and Discoloration
Stains from metals (like iron or copper) often occur when stormwater runoff carries minerals into the pool. Use a stain remover formulated for your pool type, or consult a professional if discoloration persists.
When to Call a Professional Pool Technician
Some tasks following a storm are best handled by an experienced professional. Here’s when to seek help:
- If the pool surface has visible cracks or structural movement.
- When electrical systems cannot be restored without professional wiring or repair.
- If the water cannot be cleared despite repeated filtration and shocking.
- In the case of persistent stains or algae colonies that won’t subside with home treatments.
Hiring a certified pool service ensures that any hidden system faults are caught early. It also prevents accidental chemical misuse or long-term chemical imbalance issues.
Preventive Measures to Take Before the Next Storm
Protect your pool in advance to minimize damage and reduce recovery time.
Install a Solid Pool Cover
A sturdy, reinforced pool cover protects your pool from airborne debris, heavy rain runoff, and sunlight exposure during absence after a storm. Mesh covers help drainage, but solid covers offer better protection against debris.
Prepare an Emergency Kit
Your pool emergency kit should include:
| Item | Purpose |
|---|---|
| Extra chlorine tablets or shock | Quick disinfection |
| Test kit | Water balance monitoring |
| Pole, net, and brush | Debris removal and brushing |
| Chemical gloves and safety goggles | Safe handling of cleaning agents |
Clear Surrounding Landscaping
Thin out nearby trees, prune branches, and remove loose outdoor furniture or play equipment that could become airborne during high wind.
Disconnect Equipment Beforehand
Before a predicted storm, manually remove breakers or power off pumps, LED lighting, chlorinators, and cleaners to avoid surge-related damage.
Conclusion: Storm Recovery Is Key to Year-round Pool Health
Knowing how to treat a pool after a storm is not just a reactive action—it’s a critical maintenance skill that protects your investment and prolongs the pool’s lifespan. By combining prompt response with thorough cleaning, smart chemical management, and preventive strategies, you can mitigate storm damage and restore your pool quickly.
Whether the storm was a passing squall or a major coastal event, always prioritize safety before recovery. And when necessary, don’t hesitate to contact a professional for help. A little preparation, awareness, and effort go a long way to ensuring your pool is ready when the next swim season begins.
Now that you’ve learned how to treat a pool after a storm step-by-step, you’re better prepared to handle nature’s surprises. Keep this guide handy and share it with fellow pool owners to help reinforce best recovery practices for every season!
What should I do immediately after a storm has passed to assess my pool?
After a storm has passed, your first priority should be safety. Before approaching your swimming pool, ensure the surrounding area is free of hazards such as broken glass, sharp debris, or downed power lines. Once safe, visually inspect the pool for signs of overflow, structural damage, or excessive debris. Look for cracks in the pool shell, damaged fencing, and any displaced equipment. If there is visible damage, avoid using the pool until it’s properly evaluated and repaired.
If no major structural damage is evident, begin by checking the water level. Storms can cause the pool to overflow, so lower the water level to about halfway down the skimmer if necessary. Avoid draining the pool completely, especially in areas with high water tables, as this can lead to the pool “popping out” of the ground. At this stage, remove large debris like branches or leaves to prevent damage to the filter or surfaces when cleaning begins. This preliminary assessment helps you move forward with informed cleaning and restoration steps.
How do I clean debris and contaminants out of my pool after a storm?
Start the cleaning process by manually removing large debris from the pool using a skimmer net or by hand if it’s safe to do so. Avoid vacuuming the pool at this stage if the water is still very cloudy or full of floating debris, as that can clog and damage your filtration system. Once large items have been removed, brush the pool walls and floor to loosen any debris or algae that may have settled on these surfaces. This will help the filtration system work more efficiently during the cleaning process.
After brushing, it’s time to clarify the water. If your pool is still mostly filled and the water is cloudy but not overflowing, run the filter system continuously and backwash as needed. For heavily contaminated pools, you may need a pump or wet vacuum to remove silt and smaller particles from the bottom. If the water is green or has a lot of organic matter, consider adding a clarifier to help the filter trap finer particles. Maintaining good circulation and physical cleaning will ensure the pool is on the right track for full recovery.
What steps should I take if the pool water is green or cloudy after a storm?
Green or cloudy water typically indicates an algae bloom or excessive contaminants entering the pool during the storm. Begin by testing the water chemistry, especially pH, total alkalinity, and chlorine levels. Algae thrive in unbalanced water, so correcting chemical levels is essential. You’ll most likely need to shock the pool with a high dose of chlorine to kill off the algae and help clear the water. Be sure to follow the product instructions and allow proper circulation before proceeding with additional treatments.
After shocking, run the filtration system continuously for 24–48 hours to circulate the chemicals thoroughly and filter out dead algae and debris. You may also benefit from using a flocculant or clarifier during this process, as these products help clump tiny particles together so the filter can catch them more easily. Brush the pool again after several hours of filtration to ensure no algae or sediment is stuck to the walls or floor. Once the water starts to clear, re-test the chemical levels and adjust as needed for swimmer safety.
How do I treat the pool water for potential contamination like runoff or animal waste?
Storms can introduce various contaminants into your pool, including dirt, bacteria, and organic waste like animal droppings. The first step is to test for water clarity and chemical imbalances. If you suspect agricultural runoff or animal contamination, it’s crucial to disinfect the water to kill harmful pathogens. Shocking the pool with a calcium hypochlorite or sodium hypochlorite-based product is typically effective, provided the pH is within the ideal range (7.2–7.6) for chlorine to work efficiently.
Following the shock treatment, run the filter for at least 24 hours to completely circulate and begin the cleaning process. It’s important to backwash or clean your filter media after treatment to remove trapped contaminants and prevent re-circulation. You may also want to use a phosphate remover if your area experiences heavy organic contamination, as phosphates provide nutrients that encourage algae growth. After filtration, re-test your chemistry and adjust chlorine, pH, and total alkalinity before resuming use.
What should I check on the pool equipment and pump after a storm?
Begin by inspecting all exposed pool equipment for signs of water damage, corrosion, or power-related issues. If the pump or filter system was submerged, turn off the power at the circuit breaker immediately and contact a licensed electrician or pool professional for help. Wet electrical components can be dangerous and may require drying, cleaning, or replacement. Check for grit or sand in the pump housing that might cause wear on the impeller, and clean or replace components as needed.
Once the system is safe and dry, inspect the filter (sand, cartridge, or DE type) for clogs or damage. Storm debris can severely clog filters, affecting water flow and requiring a thorough cleaning. If the filter was submerged, check for trapped moisture and allow it to dry before restarting. Test the system by slowly restarting the pump and observing pressure levels on the filter tank. Any unusual noises, pressure fluctuations, or leaks should be addressed before normal operation resumes to avoid long-term damage to your equipment.
How do I balance the pool chemistry after a storm?
Testing the water using a reliable test kit or strip is essential for rebalancing your pool chemistry after a storm. Check pH, alkalinity, calcium hardness, and chlorine levels. Adjust the pH first, ideally between 7.2 and 7.6, to ensure effective chlorine performance. Then adjust total alkalinity, which should be between 80–120 ppm for concrete pools or 125–150 ppm for vinyl or fiberglass to stabilize pH. Correcting these before chlorine will result in more effective sanitization.
Next, add the appropriate amount of chlorine to reach a free chlorine level of 1–3 ppm or higher if shocking was needed. If CYA (cyanuric acid) is too low, consider adding stabilizer to protect the chlorine from UV degradation. If the storm brought in hard water or minerals, you may also need a metal sequestrant to prevent staining. After all adjustments, run the filter for several hours while retesting to ensure everything stabilizes. Maintaining proper balance helps ensure swimmer comfort and prevents long-term damage to pool surfaces and equipment.
When is it safe to swim in the pool after a storm?
It’s safe to swim in your pool only after the water has been fully cleaned, debris removed, and your chemistry balanced within recommended parameters. This means your pH should be between 7.2 and 7.6, free chlorine at 1–3 ppm, total alkalinity adjusted, and cyanuric acid at a protective level. Additionally, the water should be clear and free of visible contaminants, such as suspended particles or oil slicks, which might indicate chemical imbalance or the need for further filtration.
As a final precaution, ensure your pool equipment is operating normally. If the pump is making unusual noises, you notice pressure fluctuations in the filter, or the skimmer or drains seem obstructed, wait until these issues are resolved before swimming. Safety also includes checking for slip hazards or damage around the pool’s edge or coping. Once all these conditions are met, allow sufficient time for the chemicals to circulate and re-test to confirm steady levels. At that point, your pool is ready for safe and enjoyable use.