Spring is always a good time to walk through your home and make sure the plumbing survived winter in one piece. But spring 2026 is different for Treasure Valley homeowners. With the lowest snowpack on record for April 1, a statewide drought emergency declared by Idaho's Director of Water Resources on April 13, and the City of Boise activating Stage 2 water conservation two months earlier than usual, there is real pressure to make every gallon count this season.

On top of that, nearly 2,000 new housing units were approved in Boise in 2025. Thousands of homeowners are heading into their first spring in a new home with plumbing that has never been tested through a full Idaho freeze-thaw cycle. Whether your home is brand new or pushing 50 years old, this checklist will help you catch small problems before they turn into big ones.

Why Spring Plumbing Maintenance Matters More in Boise This Year

The Idaho Department of Water Resources drought declaration and Boise's early Stage 2 restrictions are not just administrative paperwork. They signal that the water supply coming into summer is genuinely tight. Leaks and inefficiencies that you might have tolerated last year are worth fixing now, both for your water bill and for the community.

Hard water compounds the issue. Boise's municipal supply runs between 10 and 15 grains per gallon (gpg). Meridian comes in higher, typically 12 to 17 gpg. Over a long winter with higher hot water demand, mineral scale settles inside pipes, water heaters, and fixtures. Spring is the right time to catch what accumulated. If you are new to the area and want to understand what those numbers mean for your home, our breakdown of Meridian water hardness levels is a good starting point.

Inspect All Outdoor Faucets and Hose Bibs

Idaho's freeze-thaw cycles are hard on outdoor plumbing. Even frost-free hose bibs can develop cracks in the supply line behind the wall if the hose was left connected during a cold snap. The bib itself looks fine from outside, but the pipe behind it is split.

The check is simple. Turn on each outdoor faucet and let it run for 30 seconds. Watch the pressure. If it starts strong and then drops, or if you can hear water running inside the wall after you shut it off, there is a good chance a pipe cracked during winter. Press your hand flat against the exterior wall near the bib. Moisture or soft drywall on the inside is a reliable sign of a slow leak.

Hard water leaves mineral deposits on bib aerators, too. If the flow looks weak but pressure elsewhere in the house is fine, unscrew the aerator and soak it in white vinegar for an hour. It is a five-minute fix that most homeowners overlook.

Start Up Your Irrigation System the Right Way

Before you turn on the irrigation controller, walk every zone manually. Look for heads that are tilted, clogged, or spraying onto pavement instead of turf. Catching a misaligned rotor head now saves hundreds of gallons over the season.

Boise's Stage 2 conservation rules require watering on an odd/even day schedule based on your address, and no outdoor watering between 10 AM and 6 PM. Program your controller accordingly before the first run of the season. Given the NRCS Idaho Water Supply Outlook for 2026, we recommend cutting your zone runtimes by 20 to 30 percent compared to what you ran last summer. Turf in our climate needs less water in spring anyway, and this year the aquifer needs the help.

Boise code also requires a backflow preventer inspection on irrigation systems. If yours has not been tested recently, a licensed plumber or irrigation tech can handle it quickly. It is not optional, and it protects the municipal supply from contamination.

Flush Your Water Heater and Check for Sediment

Winter puts high demand on water heaters. Longer showers, more hot water for cooking, kids home during school breaks. All of that demand stirs up sediment at the bottom of the tank, and in a hard water area like ours, that sediment is mostly calcium carbonate from mineral scale. We cover how hard water accelerates this buildup in detail in our article on hard water scale in water heaters.

To flush a tank water heater, shut off the cold supply inlet at the top of the unit. Connect a garden hose to the drain valve near the bottom and run the other end to a floor drain or outside. Open the pressure relief valve slightly to let air in, then open the drain valve. Let it run until the water coming out is clear rather than cloudy or rust-colored. The whole process takes about 20 minutes.

If you have a tankless water heater, flushing looks different. You will run a descaling solution through the heat exchanger using a small pump and two hoses. The manufacturer manual has the exact steps, but it typically takes 45 minutes and should be done once a year in a high-hardness area like Meridian.

Check Under Every Sink and Behind Every Toilet

Braided stainless supply lines under sinks and behind toilets go through stress during winter. Pipes expand and contract with temperature swings, and fittings that were just barely tight can work loose. Take five minutes in each bathroom and under the kitchen sink to look for moisture, mineral staining on the cabinet floor, or any white crust around a fitting. Catch it now and it is a simple tightening. Let it go and it becomes a cabinet replacement.

Running toilets are a bigger issue during Stage 2 conservation than most homeowners realize. A flapper that does not seat properly can waste 200 gallons or more per day. You will not hear it unless the leak is severe. The dye test is easy: drop a few food coloring drops into the tank and wait 15 minutes without flushing. If color shows up in the bowl, the flapper needs replacing. It is a $10 part and a 10-minute fix.

Check dishwasher supply lines while you are at it. Hard water leaves a chalky buildup inside the line over time. If your dishwasher has been leaving spots on glassware or running longer cycles, sediment in the supply line or the inlet screen is often the culprit.

Inspect Exposed Pipes in Crawlspaces and Garages

If your home has a crawlspace with uninsulated supply runs, go in and look. A flashlight and 20 minutes is all it takes. You are looking for a bulge in copper or PEX pipe, which signals that water froze inside and expanded the pipe wall. The pipe may have thawed without leaking yet, but the wall is compromised and it will fail eventually, usually at the worst possible time.

Discoloration around a joint or fitting is another sign. Green staining on copper means the fitting has been weeping. Blue-gray staining on PEX connections usually points to a slow drip at the crimp ring.

Older Boise homes, particularly those built before 1980, may still have galvanized steel supply lines. Galvanized corrodes from the inside out, and our hard water accelerates that process significantly. If you see rust-colored water when you first turn on a tap that has been sitting, or if you notice reduced flow in an older part of the house, galvanized corrosion is worth investigating. A plumber can scope the lines and tell you how much useful life is left.

Test Your Water Quality This Spring

Spring is when water quality can shift most noticeably in the Treasure Valley. As snowmelt recharges the aquifer and Boise's supply transitions from a higher groundwater mix in winter to more surface water in summer, hardness levels and mineral content can change. The water you tested in October may not reflect what is coming through your taps in May.

A water test this time of year gives you a current baseline. It is especially useful if you have noticed changes in taste, if scale on fixtures seems worse than usual, or if you moved into your home in the last year and have never tested at all. Understanding what is actually in your water is the starting point for making smart decisions about treatment, whether that is a softener, a filter, or simply knowing everything is fine.

We offer free water tests for Treasure Valley homeowners. Call us at (208) 968-2771 to schedule one. There is no obligation, and you will leave with real data about your water instead of guesswork. You can also learn more about what drives your monthly water costs in our guide to the Boise water bill explained.

Know What Is in Your Water Before Summer Hits

Our free water test takes less than 30 minutes and gives you real numbers on hardness, minerals, and anything else that should be on your radar heading into drought season. No pressure, no obligation.

Schedule Free Test Call (208) 968-2771

Frequently Asked Questions

Most years we recommend waiting until mid-April when overnight freeze risk drops. In 2026, with Stage 2 conservation already active, we suggest holding off until you have reviewed your controller schedule against the odd/even day and no-watering window rules. Program your system for reduced runtimes before you run the first zone. Starting later and running less is the right call this drought season.
Hard water carries dissolved calcium and magnesium. As water heats up or sits in pipes, those minerals precipitate out and stick to the pipe interior as scale. Over years, scale narrows the effective diameter of supply lines, reduces water pressure, and creates rough surfaces where bacteria can accumulate. In water heaters, scale acts as insulation between the heating element and the water, making the unit work harder and driving up energy costs. At 12 to 17 gpg in Meridian, the buildup is faster than most homeowners expect.
A pipe that froze and thawed without leaking will often show a visible bulge or deformity in the pipe wall, particularly in copper. You may also see discoloration at fittings or small mineral deposits where a slow seep dried up. Reduced water pressure in one area of the house, even when flow is fine everywhere else, can point to a partial restriction caused by ice damage. Any of these signs warrant a closer look before the pipe fails completely.
Most of the inspection steps on this list are homeowner-friendly. Checking for moisture under sinks, running the dye test on toilets, cleaning aerators, and walking irrigation zones are all DIY tasks. Where we recommend calling a licensed plumber: anything involving the main shutoff, the pressure relief valve on a water heater, backflow preventer testing, or if you find a bulging pipe or active leak. The cost of a service call is much lower than the cost of water damage cleanup.
Once a year is the standard recommendation for most areas. In Meridian, where hardness regularly hits 12 to 17 gpg, we think twice a year is worth considering, especially for tank units over five years old. Spring and fall are natural times to do it. If you hear popping or rumbling from your water heater during the heating cycle, that is sediment boiling at the bottom of the tank and a sign that a flush is overdue.