San Bernardino, California Water Outage Today

Who runs the water in San Bernardino: system profile

The system behind most taps in San Bernardino is San Bernardino City, which EPA records list as serving roughly 214,665 people. Customers know it as San Bernardino Municipal Water Department; the name on your bill is the one to call.

Source water and treatment in San Bernardino

San Bernardino drinks groundwater. San Bernardino City pumps it from 41 active wells and treats it before it goes into the mains.

What this means in an outage. Wells mean there is no big plant to fail, but each one needs power to lift water. A grid outage can drop several at once, and recovery depends on how many have standby generators. San Bernardino Municipal Water Department can say which zones are covered.

What causes water outages and low pressure in San Bernardino

These are the causes that match the record for San Bernardino, listed roughly in order of how much they matter here.

• Flooding and heavy rain. NOAA logged 600 flood, flash flood and heavy rain reports in San Bernardino County from 2015 through 2026, and 3 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.
• Summer demand. San Bernardino has about 48 days a year at or above 95°F and 16 at or above 100°F, and the hottest day in the record came on September 6, 2020. Lawn irrigation and cooling push demand to its yearly high, so pumps run hard, tanks drain faster than they refill and pressure sags on high ground in the evening.
• Long dry spells. The longest stretch without measurable rain since 2015 lasted 83 days, ending July 29, 2016. Dry soil shrinks and shifts around buried pipe, and breaks often cluster when the rain returns and the ground swells again.
• Older neighborhoods and pipe. 45.7% of occupied homes in San Bernardino 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.
• Storm-driven power loss. Thunderstorm wind, hail and tornado reports in San Bernardino County number 87 since 2015. Pump stations and treatment plants that depend on Southern California Edison (SCE) run on the electric grid, so a storm that downs power lines can lower water pressure even when no pipe is damaged.
• Construction and third-party damage. A backhoe or boring crew that hits a main is among the most common reasons a single block goes dry without warning. Utilities handle those the same way as any break: isolate, repair, flush.

Freeze, heat and rain: the San Bernardino weather record

Heat, not frost, is the main weather stress on the water system in San Bernardino: summer demand peaks while irrigation and cooling run at full tilt.

These counts come from a gridded reanalysis, which smooths out single-day extremes and can differ by a few degrees from an airport thermometer. Use them to compare seasons and years, not as official station records.

Is San Bernardino water safe? Boil notices and EPA record

EPA lists no health-based violations for San Bernardino City since 2015.

A boil water notice in San Bernardino is a separate thing from a violation. San Bernardino Municipal Water Department issues one when pressure falls low enough for contamination to enter the pipes, after a main break is repaired, or when a routine test comes back positive. The State Water Resources Control Board, Division of Drinking Water oversees the process, and the notice stays until clean samples come back, usually a day or two after pressure returns.

Lead, older pipes and water quality in San Bernardino

The most recent 90th-percentile lead result filed for San Bernardino City is 0 ppb (2024). The federal action level is 15 ppb, so that result is far from the limit.

The age of the housing matters more than the utility's test average: 45.7% of occupied homes in San Bernardino predate 1970 and 1986 was the year lead pipe and solder were banned. Flush the cold tap after an outage and ask San Bernardino Municipal Water Department whether your service line is on its lead inventory.

How long a water outage lasts in San Bernardino

A crew that arrives at an ordinary main break in San Bernardino 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.

For a break that affects many customers, San Bernardino Municipal Water Department usually posts an estimated restoration time. When you call, ask the dispatcher what the crew has told them.

How much water to keep on hand in San Bernardino

The average household in San Bernardino has about 3.5 people, so FEMA's minimum of one gallon per person per day comes to roughly 10 gallons for three days and 49 gallons for two weeks.

• Heat: 48 days a year top 95°F here, so plan for more than the one-gallon minimum, and keep extra for pets.
• 6.6% of homes are mobile or manufactured homes, whose pipes are more exposed to freezing and have less room for a water heater tank as backup.
• 50% of households rent. Tell your landlord or property manager about a leak or outage right away, since the shutoff valve may be theirs.
• Do not forget the water heater: the tank holds roughly 30 to 50 gallons you can drink after it is switched off and allowed to cool.
• Fill the bathtub and a few large pots as soon as you hear a break is likely; that water is for flushing and washing, not drinking.

Water systems near San Bernardino, side by side

Water outage pages for nearby cities

Fontana, CA · Moreno Valley, CA · Riverside, CA · Anaheim, CA