Water Filters for Apartments and Rentals: What Works When You Can't Touch the Plumbing

If you rent, you can't cut into the main water line, so the filter goes where you drink: the kitchen tap. That is less of a loss than it sounds, because the water you drink and cook with comes out of that one faucet. What you can put there depends on two things: what your landlord will allow under the sink, and what your tap water actually has in it.

Caller "I live in an apartment, and I was wondering, can anything be done about apartment water? I've had my water tested. It is high in copper."

Aidan "The only thing that would take the copper out is a reverse osmosis system under the sink."

A renter in Georgia on city water called with that in September 2026, after blue-green stains showed up in the tub. This page is the long version of my answer, for renters whose landlord says yes to the sink cabinet and for those whose landlord says no.

Test your apartment's tap first

Your city tests the water it sends out, but the pipes inside your building can add lead and copper before it reaches your faucet. The EPA says lead pipes are more likely in homes built before 1986, and that in homes without a lead service line the usual source is brass faucets and plumbing joined with lead solder.

Start with the free part. Call your water utility (its name is on your water bill) and ask for its water quality report. They have to give it to you, and it costs nothing. It covers the water arriving at your building, including the chlorine or chloramine the city disinfects with. How to read your water quality report walks through the numbers.

Then test at your own faucet for what the building adds. A caller renting a 130-year-old house in Illinois had new PEX in the kitchen and older pipes in the bathroom. PEX isn't going to add anything to the water. If you have copper pipes with lead solder joints, or older brass fixtures, you could have lead in the water.

If lead does show up, it is a drinking water problem, not a shower problem. The EPA says showering is safe even above its lead action level of 15 parts per billion, because skin does not absorb lead in water. So the faucet you drink and cook from is the one to filter, and that is the one a renter can reach.

Copper is different: I told the Georgia renter at the top of this page that a Brita wouldn't remove it, and that an under-sink reverse osmosis system would.

Already have a lab report? Skip this. No number yet: certified lab test, $199

Test your kitchen faucet for lead

One certified lab test, mailed to you, run by an accredited lab, checks 47 contaminants in one sample from your tap, lead and copper included. It does not test chlorine or PFAS.

Get the certified city water test

Results about 5 business days after the lab receives the sample.

Have your test or city report?

Send Aidan a photo of your results

Text a photo of your lab report or your city's water report, and Aidan will tell you which filter it calls for, or that you don't need one.

Text Aidan443-277-2204 Call800-460-5810Aidan

8 AM to 5 PM Eastern, seven days a week. A real person, not a call center.

Which filters work without touching the plumbing?

A pitcher and a countertop reverse osmosis machine need no plumbing and no landlord's permission; an under-sink system needs your landlord's OK. What each one takes out is the part to check against your test.

A renter in Pennsylvania whose landlord wouldn't go in on a system asked me for a countertop filter for PFAS. Most of the countertop units are just carbon units, and they don't have much capacity; a countertop reverse osmosis machine is the exception. A carbon pitcher can help with PFAS, because carbon is what takes PFAS out, but only one certified for it gives you a number you can trust. On the label, NSF/ANSI 42 covers chlorine taste and odor, 53 covers a contaminant with a health effect such as lead, and 58 covers reverse osmosis. NSF itself says a certification does not cover every contaminant, so look for the one you tested for. The countertop and pitcher filter guide compares the no-plumbing options in more detail.

Is an AquaTru worth it for a renter?

An AquaTru is a countertop reverse osmosis machine: you plug it in, fill its tap water tank at the sink, and it filters into a 0.75 gallon clean water tank you pour from. No plumbing and no landlord. Its maker says it is independently certified by IAPMO to NSF standards to reduce 84 contaminants, lead and PFAS among them. We don't sell it; the prices and details below are from the maker's own site and owner's manual, checked October 26, 2026.

Living with one means refilling by hand. Each tank takes about 10 to 15 minutes to filter, the quarter tank left on the tap water side has to be poured out every time you refill, and the maker says to wash both tanks every week. One owner on the maker's own site wrote that they "run out of filtered water quickly because it's a small container."

It does waste less water than the Pure-75 under the sink. You pour out about a quarter of each tank, while the Pure-75's sheet rates it at 18.73% efficiency, about 1 gallon of drinking water for every 5 gallons that go through it.

One warning from its manual: use it only on city-treated water or water known to be free of bacteria. The MAW-50's sheet says the same thing about under-sink reverse osmosis, so a rented house on a well needs a test before either one.

So the AquaTru is the honest pick for a renter whose landlord says no and whose test found something reverse osmosis takes out. If you own the place, or the landlord says yes, an under-sink system costs less up front, holds more water and fills itself.

Are under-sink filters safe for rentals?

Yes, with your landlord's OK in writing: an under-sink reverse osmosis system connects to the cold water valve under the sink with an adapter, to the drain pipe with a clamp, and to its own small faucet. The filters and the 3.2 gallon tank sit in the cabinet. The drain clamp needs a small hole drilled in the drain pipe, and the faucet needs a new hole if the sink has no spare one, so tell the landlord before, not after.

I recommend having a plumber put it in, and I'm a phone call away for your plumber. It is about 30 to 45 minutes of a plumber's time. If you'd rather do it yourself, text me at 443-277-2204 with any questions. The MAW-50 wants 30 to 100 psi of water pressure and water under 15 grains of hardness; your test shows the hardness.

What to tell your landlord:

• What it connects to, from the table above, including the two holes.
• That a plumber puts it in.
• That it leaves with you, and the valve goes back the way it was.
• All of it in an email, so you both have it in writing.
• If your test found lead or copper, send the report too. It turns a tenant wanting a gadget into a question about the building's pipes.

Which one for a rental: the MAW-50 ($275) for the price, or the Pure-75 ($595) if you want filter changes to be a quarter turn: its cartridges twist out without shutting off the water. Either one comes out when you move and goes under the sink at your next place.

Can an apartment have a water softener?

Not a regular one: a whole-home softener goes where the main water line comes into the home, and in an apartment that line belongs to the building.

The closest thing is a portable softener built for RVs and boats. The On The Go Double Standard, for example, is a 16,000 grain resin tank 22 inches tall that weighs 32 pounds and connects with garden hose fittings. It lists at $260 on its maker's site ($192 on sale in October 2026). We don't sell portable softeners.

Two limits matter in an apartment. My read is that hose fittings mean it can only soften what you can hose into. And you regenerate it yourself: pour in 2 boxes of table salt, rinse it slowly for 24 to 30 minutes, then 6 to 8 more at full flow. At 15 grains of hardness its maker rates it at 1,066 gallons between salt refills. The EPA puts home use at 82 gallons a person a day, so if it softened everything for two people, that is a refill about every week.

A shower filter is not a softener. NSF certifies shower filters only for reducing free chlorine.

If you own your condo and it has its own water line, a real softener is possible. For two people on city water I usually recommend a 1.5 cubic foot carbon tank and a 48,000 grain softener: our carbon filter and softener package ($3,195). This is a job for a plumber, ideally one who has installed water treatment before: the carbon tank goes in right before the softener, the softener needs its own drain line, and it takes 3 to 4 hours or more. I'm a phone call away for your plumber. Check with your condo association before you buy.

Frequently asked questions