Water Softener & Filtration Installation in Rockville, MD
Rockville homes get moderately hard water from City of Rockville. We soften it, remove the disinfectant and polish your drinking water for $2,499 installed.
What is in Rockville's water
Rockville is one of two Montgomery County cities with its own treatment plant, so we pull the city's current report rather than assuming WSSC numbers. Both supplies are Potomac water in the moderately hard range, and the common complaints are scale and chlorine taste.
Seasonal changes
Check the city's annual report.
Lead and older plumbing
Lead does not come from the treatment plant. It comes from older home plumbing: pre-1986 solder, older brass fixtures and, in some neighborhoods, lead service lines.
PFAS: Utilities that draw from the Potomac have reported low-level PFAS detections in routine monitoring. EPA finalized limits for PFOA and PFOS in 2024. An under-sink reverse osmosis system certified to NSF/ANSI 58 is the practical fix at the tap you drink from.
Water utility
City of Rockville Water
Most of the City of Rockville is on the city's own Potomac River plant. Some neighborhoods, and all Rockville-addressed areas outside city limits, are on WSSC Water. We confirm from your bill.
- Hardness
- about 4 to 8 grains per gallon
- Moderately hard (approximate, confirm with latest report)
- Disinfectant
- Not yet confirmed
- We confirm before ordering media
- Source
- Potomac River, treated at the city-owned plant
Rockville is unusual in Montgomery County because the city runs its own plant. The first step for a Rockville home is confirming whether the bill comes from the City or from WSSC.
Checked September 2026. Source: City of Rockville.
Homes in Rockville
Rockville spans 1950s Twinbrook ranches, 1970s colonials and 2000s King Farm and Fallsgrove townhomes. Basement installs are standard; townhomes usually have a utility closet on the garage level that fits a compact single-tank system.
What we usually install here
Softener with carbon sized from the city report, plus under-sink reverse osmosis.
Rockville pricing, published
Prices include equipment, a licensed plumber's installation and startup for a standard install. If anything about your home changes the price, you hear it before we book the plumber, not after.
Whole-Home + Drinking Water
The complete package for a municipal-water home.
$2,499installed
- Metered whole-home softener
- Catalytic carbon for chloramine and chlorine
- Sediment pre-filter and bypass
- 5-stage under-sink reverse osmosis with faucet
- Licensed installation, startup and salt
Whole-Home Only
Soft, chlorine-free water at every tap and shower.
$1,899installed
- Metered whole-home softener
- Catalytic carbon media
- Sediment pre-filter and bypass
- Licensed installation, startup and salt
- Add reverse osmosis any time
Reverse Osmosis Only
Clean drinking water for condos and kitchens.
$799installed
- 5-stage NSF/ANSI 58 system
- Removes lead, PFAS and dissolved solids
- Dedicated lead-free faucet
- Optional fridge and ice line
- Licensed installation and first filters
Standard install covers
- Main water line, a drain and an outlet within reach in a basement, garage or utility room
- Kitchen sink with cabinet space for the reverse osmosis unit
- Copper or PEX supply lines in serviceable condition
- Permit where your jurisdiction requires one
Quoted before we book
- Long plumbing runs to reach the main line, or adding a drain or outlet
- Crawlspace or exterior installs, and galvanized pipe that needs replacing
- Private wells: lab test first, then a system designed to the results
- Fridge and ice maker line for the reverse osmosis unit
Water problems we fix in Rockville
How it works in Rockville
Request a consultation
Send your address and the service you want. We check your utility's published hardness and disinfectant and ask a few questions about your home.
Get one firm price
Within a business day you get the exact equipment we recommend, with model numbers, and an installed price that does not change on install day.
Licensed plumber installs it
A licensed, insured plumber installs the system in two to four hours, tests it, and walks you through salt and filter changes. Then you forget about it.
Rockville neighborhoods we serve
- Rockville Town Center
- King Farm
- Fallsgrove
- Twinbrook
- Hungerford
- West End
- Woodley Gardens
- Aspen Hill
- North Bethesda
ZIP codes: 20850, 20851, 20852, 20853
Rockville water questions
How hard is the water in Rockville?
Rockville is served by City of Rockville Water. We expect about 4 to 8 grains per gallon, which is moderately hard. Rockville treats Potomac River water, so hardness is expected in the same moderate band as neighboring WSSC Potomac-plant water. Confirm with the city report.
Does Rockville tap water contain chloramine?
We confirm the disinfectant from the utility's latest report before specifying carbon media for a Rockville home. Disinfectant type not yet confirmed from the city report.
How much does a water softener cost in Rockville?
$1,899 installed for a metered softener with catalytic carbon, or $2,499 with an under-sink reverse osmosis system. That covers equipment, a licensed plumber's installation and startup for a standard install; we quote any extras before booking.
Do you install in Rockville townhomes and condos?
Townhomes, yes, usually with a compact single-tank softener in the utility closet. Condos where the building supply cannot be modified get an under-sink reverse osmosis system, which handles drinking water taste, lead and PFAS without touching shared plumbing.
Is Rockville water safe to drink?
Yes. City of Rockville meets federal and state standards, and we will never claim otherwise. A home system addresses comfort (hardness, disinfectant taste and smell) and, at the kitchen tap, contaminants that enter from home plumbing such as lead.