Pittsburgh, Pennsylvania Water Outage Today

Who runs the water in Pittsburgh: system profile

Federal records name Pittsburgh Water & Sewer Authority as the public water system for Pittsburgh, with about 520,000 people on its mains. Customers know it as Pittsburgh Water; the name on your bill is the one to call.

Where Pittsburgh's tap water comes from

Pittsburgh drinks surface water. Pittsburgh Water & Sewer Authority draws it from Allegheny Riv Mp 8#2 and treats it before it goes into the distribution system. Treatment points named in EPA's facility list include Pittsburgh WTP.

What this means in an outage. Surface water needs a treatment plant running around the clock, so a plant shutdown, a raw-water pump failure or a long power cut at the plant can lower pressure across the whole service area, not just on one street. Boil water notices are more likely to be citywide after that kind of failure than after a single main break.

Why the water goes out in Pittsburgh

Water outages are local, so the likely cause depends on weather, pipe age and the grid. For Pittsburgh, these stand out.

• Freezing weather. Pittsburgh sees about 122 days a year with a low at or below 32°F, and 32 days at or below 20°F. The coldest morning in the 2015 through 2025 record came on January 31, 2019. The longest stretch with highs that never rose above freezing ran 14 days, ending January 7, 2018. Frost pushes into shallow service lines first. Mains follow when the ground heaves and thaws, which is why break counts climb a day or two after the temperature swings.
• Flooding and heavy rain. NOAA logged 401 flood, flash flood and heavy rain reports in Allegheny County from 2015 through 2026, and 4 days a year bring an inch of rain or more. High water can wash out the ground under buried pipe, flood pump stations and push treatment plants past their limits, which is why boil notices so often follow a flood.
• Storm-driven power loss. Thunderstorm wind, hail and tornado reports in Allegheny County number 821 since 2015. Pump stations and treatment plants that depend on Duquesne Light run on the electric grid, so a storm that downs power lines can lower water pressure even when no pipe is damaged.
• Older neighborhoods and pipe. 76.3% of occupied homes in Pittsburgh were built before 1970, against 35.5% nationally. Streets of that age tend to sit on cast iron and early steel mains that are near or past their design life, which is where most breaks start.
• Digging and utility work. Street projects, fiber installation and excavation near buried pipe regularly cut mains in Pittsburgh with no warning, usually on a day with perfectly ordinary weather.
• Planned shutoffs and a problem at one address. Valve replacements and new connections are announced ahead, often with door hangers. If neighbors have water, check your own shutoff valve, meter and pressure regulator before calling.

How weather strains the Pittsburgh water system

Main break season in Pittsburgh runs from late fall into early spring, with the coldest stretch around December through February.

Because this is gridded reanalysis data, individual hot and cold days can read a few degrees off what the airport recorded. The day counts and yearly patterns are the useful part.

Pittsburgh boil water notices and EPA compliance record

EPA lists 2 health-based violations for Pittsburgh Water & Sewer Authority since 2015. It also lists 46 monitoring or reporting entries that are about paperwork rather than water quality, such as a missed sample or a late report.

Most recent health-based entries:

• July 2018: A missed lead service line replacement requirement It is marked resolved.
• July 2017: A missed lead service line replacement requirement It is marked resolved.

When Pittsburgh loses pressure after a break or a failed test, Pittsburgh Water asks affected customers to boil water for drinking and cooking. The notice ends only after samples come back clean, which usually takes one to two days after service returns, and the Pennsylvania Department of Environmental Protection (DEP) supervises the process.

Lead service lines and old plumbing in Pittsburgh

The most recent 90th-percentile lead result filed for Pittsburgh Water & Sewer Authority is 2 ppb (2025). The federal action level is 15 ppb, so that result is comfortably below it.

The age of the housing matters more than the utility's test average: 76.3% of occupied homes in Pittsburgh predate 1970 and 1986 was the year lead pipe and solder were banned. Flush the cold tap after an outage and ask Pittsburgh Water whether your service line is on its lead inventory.

Restoration times for water outages in Pittsburgh

A crew that arrives at an ordinary main break in Pittsburgh usually needs 4 to 8 hours to isolate the pipe, dig, repair, flush and restore pressure. Large transmission mains, deep pipes and breaks under busy streets can take a day or more. With 520,000 people on the system, a break on a main that feeds a whole district can leave thousands of homes dry at once, and crews may close valves several blocks away to isolate it.

Pittsburgh Water will post an estimated restoration time for a break that affects many customers; ask for the repair crew's estimate when you call.

Preparing for a long water outage in Pittsburgh

The average household in Pittsburgh has about 2.2 people, so FEMA's minimum of one gallon per person per day comes to roughly 7 gallons for three days and 31 gallons for two weeks.

• 52.3% of households rent. Tell your landlord or property manager about a leak or outage right away, since the shutoff valve may be theirs.
• A standard water heater is a ready-made 40-gallon reserve. Shut off its power or gas, open a hot tap somewhere in the house, and draw from the drain valve.
• If a planned shutoff or storm is coming, fill the tub and some buckets for flushing toilets and washing; keep drinking water in clean sealed containers.

Water systems near Pittsburgh, side by side

Water outage pages for nearby cities

Wheeling, WV · Morgantown, WV · Youngstown, OH · Canton, OH