Brown water from a Philadelphia tap is, in the Water Department's words, "unpleasant to look at and taste, but it is not harmful," and its advice for the first chore is one line: "Do not wash clothes when water appears rusty because the rust will stain the fabric." Milky water is a different thing, air in cold water that clears from the bottom of the glass upward. This guide sets the two answers side by side, adds a one-glance test, and covers a booked visit on a brown-water day. Our Terms say little about it, so tell us before the visit.
Every quotation comes from the Philadelphia Water Department's Drinking Water FAQ and contact page (neither shows a date), both read on November 2, 2026, or from our own published Terms of Service and add-on list. This guide is not the City's advice and not plumbing or health advice. If the water worries you, call the City.
The short answer
- Brown or rusty: the City says it is "iron or rust," "not harmful," and "usually short-lived."
- Milky or cloudy: the City says it is air from cold water that "will quickly dissipate."
- While it runs brown: "Do not wash clothes."
- Once it runs clear: "Flush your cold and hot water."
- A booked visit: our Terms name running water but not its color. Tell us before the visit.
The City's two answers, side by side
Each cell is the City's own wording. The steps come after the table.
| What you see | What the City says it is |
|---|---|
| Brown or rusty | "the color is a result of the presence of iron or rust." Rust "may be stirred up" when "there is an upset in the system such as a water main break, or when a valve is operated or water flow is changed." It is "usually short-lived, and should be gone in a day or less once it is flushed from our water distribution system or your home plumbing." |
| Milky or cloudy | "When cold, such as during the winter, water is rich in oxygen. When it enters our homes, the water warms up and the oxygen wants to escape." The "tiny air bubbles give the glass of water a milky appearance under natural or household lighting." "The air bubbles are not harmful and will quickly dissipate." |
The two pages we read do not say where crews are working or when a given street will clear.
A one-glance test
This test is ours, built on the City's description. Fill a clear glass and set it on the counter. If it stays colored the whole way through, it looks like the City's description of rust. If it is white and "clear from the bottom of the glass upward, as the air bubbles rise and escape into the air," it looks like the City's description of air. A glass that does neither is a reason to call the City, not to guess.
The City's contact page lists a "Water Emergency Hotline" at (215) 685-6300 and says its web form is for questions, not urgent ones: "This form is NOT for emergency use." The FAQ does not say whether brown water counts as an emergency, so ask the City, not us.
What to hold off on while it runs brown
The City's page names one chore, and it is the laundry. "Do not wash clothes when water appears rusty because the rust will stain the fabric." It names no other chore, and this guide invents none.
When the color is gone, the City's last step is to run both taps: "Flush your cold and hot water, once the discoloration is gone, to make sure the rust does not accumulate or stay in your plumbing." The page gives no duration.
If a clean is booked that day
Section 4.2 of our Terms of Service, "Our Right to Adjust or Refuse Service," lists "Lack of Essential Utilities": "Access to running water and electricity within the home is required to perform cleaning services effectively. Service may be refused or significantly impacted if these are unavailable." Brown water is still running water, so those words do not settle this case, and the Terms say nothing else about discolored water. What is left is a conversation, and it is easier before the visit than at the door. Tell the team the water is running brown or cloudy so a person can look at your booking.
The Laundry add-on, "Laundry Wash & Dry (Per Load)," runs a load of your laundry (how a load fits a visit). We have no published rule for a load on a brown-water day. The City's line is about washing clothes while the water is rusty, so if you booked the add-on, ask before the visit whether to hold the load. Moving a visit is covered by our guide to skipping, rescheduling or pausing; this guide promises no waived fee.
What this guide does not cover
It does not cover whether your water is fit to drink, plumbing repair or home filters. White crust and film from minerals is a different cause, covered in the Philadelphia hard-water guide.
Where to go next
For what to put away before a visit, see how to prepare for house cleaners. When you are ready, start a booking.
Frequently asked questions
Is brown tap water in Philadelphia harmful?
The City's FAQ says that when rust is stirred up, "the water is unpleasant to look at and taste, but it is not harmful." We add nothing to that. The page calls a rust problem "usually short-lived"; if the color does not clear, call the City (our suggestion, not the City's).
Can I do laundry when my water is brown?
The City says "Do not wash clothes when water appears rusty because the rust will stain the fabric."
Why is my tap water milky in winter?
The City says "When cold, such as during the winter, water is rich in oxygen," and the air comes out as the water warms. The bubbles "will quickly dissipate."
Will Hometress cancel my clean if the water is brown?
Our Terms say service "may be refused or significantly impacted" without running water, and brown water is running water, so they do not decide it. Tell the team before the visit.