You've probably already thought about the AC. Maybe you've tested the grill, checked the pool chemicals, and stocked up on sunscreen. But there's one home system that almost every family overlooks before summer hits — and it quietly affects everything from how your water tastes, to how well your appliances perform, to how much you actually want to drink from the tap.

Your water system is about to work harder than it has all year. Here's what to check before the heat arrives.

Why Summer Is Harder on Your Water Than You Think

Most people assume water quality is more or less consistent year-round — the same water, treated the same way, delivered the same way. But that's not quite how it works.

Summer changes your water in ways that happen slowly enough that most families don't notice until something's clearly off. Here's what's actually happening behind the scenes:

Higher temperatures affect your source water. Warmer weather accelerates the growth of algae in reservoirs and lakes — the same bodies of water that feed many municipal systems. Algal blooms can affect the taste and odor of treated water, giving it an earthy or musty quality that no amount of filtration at the treatment plant fully eliminates. Municipalities typically respond by adjusting chemical treatment, which can mean more chlorine or disinfectant byproducts making it to your tap.

Demand spikes — and so does stress on your system. More showers, more laundry, more outdoor water use, more ice, more guests — summer routinely doubles or triples household water consumption. For homes with filtration or softening systems, that increased demand means filters work harder, deplete faster, and may not perform as well if they're already due for maintenance.

Hot pipes affect water quality at the tap. Water sitting in pipes and fixtures that heat up over the course of a hot day can develop off-flavors and, in rarely-used lines, create conditions more favorable to microbial growth. That faint musty smell from a bathroom faucet you haven't run in a few weeks? Heat is often a contributing factor.

The good news: most of these issues are entirely manageable with a little preparation. Here's what to work through before the season ramps up.

1. Check and Replace Your Drinking Water Filters

This is the single most important and most overlooked step. Most homeowners vaguely know their filters need changing but aren't sure when they last did it — and summer's increased water use will push an already-tired filter past its limits faster than you expect.

Under-sink and countertop filters typically need new cartridges every 3–6 months, though this varies by system and water quality. If you can't remember the last time you replaced yours, replace it now.

Reverse osmosis systems have multiple filter stages on different replacement schedules. Pre- and post-filters typically need replacement every 6–12 months; the RO membrane itself every 2–3 years. If you're unsure where you are in the cycle, check with your system's manufacturer or schedule a professional checkup.

Whole-home filtration systems carry a heavier load in summer due to increased flow rates and potentially more sediment from seasonal runoff. A filter that might last six months under normal conditions could be ready for replacement sooner during peak summer months. Keep an eye on water pressure and taste as early indicators that a cartridge is due.

A simple rule of thumb: If you're heading into summer and your filters are more than halfway through their recommended lifespan, replace them now rather than waiting. The cost of a filter cartridge is a fraction of the cost of degraded water quality or a damaged system.

2. Check Your Water Softener's Salt Level

If your home has a water softener, summer is a critical time to make sure it's adequately supplied. Softeners regenerate more frequently when water usage is high — and if the salt tank runs low or dry, hard water passes through untreated.

The signs are familiar but easy to attribute to other causes: dishes that look filmy after the dishwasher, soap that doesn't lather as well, skin that feels drier after showering. If any of those appear over the summer, a depleted salt tank is one of the first things to check.

As a general rule: visually inspect your brine tank at least once a month during summer. You want the tank roughly half full or higher. Also check for "salt bridging" — a hardened crust that forms across the top of the tank and prevents salt from dissolving properly, which can cause the softener to appear to have salt while actually running without it. Break up any bridges with a broom handle before they cause problems.

3. Don't Forget the Refrigerator Water Filter

This one catches a lot of families off guard. The refrigerator filter — the one supplying your ice maker and water dispenser — is often forgotten entirely until the ice starts tasting strange or the water flow slows to a trickle.

Most refrigerator filters are designed to last about 6 months or 200–300 gallons of water. During summer, when families are going through significantly more ice and cold water, that lifespan can be cut considerably shorter. If you haven't changed your refrigerator filter since last fall or winter, summer is a good time to put in a fresh one — especially before you're hosting guests or relying on it more heavily.

Check your refrigerator's manual for the specific filter your model uses, or look for the filter change indicator on the display panel if your model has one.

4. Inspect Outdoor Water Lines and Connections

Garden hoses, outdoor spigots, and irrigation connections take a lot of wear over the course of a year — and summer is when you'll be using them most. Before the season hits fully:

• Check hose connections for cracks or leaks, especially at the faucet connection point
• Inspect outdoor spigots for dripping, which can indicate a worn washer or valve
• If you have an irrigation system, run it through a full cycle and walk the zones to catch broken heads or spray pattern issues before they've been quietly miswatering (and wasting water) all season
• Make sure any outdoor water features — fountains, misters, pet water stations — are clean and free of buildup before regular use resumes

One important note on garden hoses: standard garden hoses are not designed for drinking water and can leach compounds into the water when left in the sun. If your kids (or pets) drink from the outdoor hose, consider a hose labeled as "drinking water safe," or simply discourage the habit and keep a filtered water source accessible outside.

5. Run Infrequently Used Faucets

Before summer's social season kicks in, run every faucet and showerhead in your home — especially in guest bathrooms, outdoor showers, or utility sinks that may have sat dormant since last fall or winter. Let each run for a few minutes on cold.

Stagnant water sitting in pipes can develop a flat, metallic, or musty taste. In homes with any older plumbing, it may also have elevated lead levels from prolonged contact with pipes or fixtures. Running the water before use — especially first thing in the morning or after any extended period of disuse — is a simple and effective habit that most people overlook.

6. Think About Hydration — and Whether Your Water Is Helping or Hurting It

Here's the less obvious one. Summer means your family is sweating more, spending more time outside, and needs to be drinking significantly more water than during cooler months. Whether they actually do that depends, in part, on whether the water tastes good enough to reach for by default.

Studies consistently show that taste and odor are the primary reasons people choose bottled water or flavored drinks over tap — not safety concerns, not cost. If your tap water tastes vaguely like chlorine, has a flat mineral quality, or leaves a lingering aftertaste, your family is less likely to stay properly hydrated through the summer.

A water filtration system that's well-maintained and performing at its best makes a real, practical difference in how much your family drinks from the tap. That's especially worth thinking about for kids, who tend to make hydration decisions based on preference rather than discipline.

The Pre-Summer Water Checklist

Here's a quick-reference list to work through before summer hits:

• Drinking water filters — Replace if overdue or more than halfway through lifespan
• RO system — Check pre/post filters and confirm membrane schedule
• Water softener — Check salt level, break up any bridges, ensure brine tank is at least half full
• Refrigerator filter — Replace if it's been 6+ months or water/ice quality has declined
• Outdoor spigots and hose connections — Inspect for leaks and cracks
• Irrigation system — Run a full cycle and walk the zones before the season starts
• Infrequently used faucets — Flush each one for a few minutes on cold
• Whole-home system — Schedule a professional checkup if it's been more than a year

The Bottom Line

Your home's water system works quietly in the background all year — but summer is when it gets tested. A few simple checks before the heat hits can mean the difference between water that performs all season and a midsummer breakdown or decline in quality that's harder to address after the fact.

Most of this list takes less than an hour to work through. And if you're not sure where your system stands, a professional water checkup is the fastest way to get a clear picture before you need it most.

What's In Your Water?

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