Water Softener & Filtration Installation in Capitol Hill, DC
Capitol Hill homes get moderately hard water from DC Water, disinfected with chloramine. We soften it, remove the disinfectant and polish your drinking water for $2,499 installed.
What is in Capitol Hill's water
DC Water is moderately hard (about 4 to 7 grains) and chloramine-treated. On the Hill the bigger concern is plumbing age: lead service lines and old solder are still common in pre-1950 rowhouses, so a lead-certified reverse osmosis unit at the kitchen sink is our first recommendation.
Seasonal changes
Every spring DC Water temporarily switches to free chlorine to clean the pipes. The chlorine smell is strongest during those weeks.
Lead and older plumbing
DC still has lead service lines in many older neighborhoods, and DC Water runs a replacement program (Lead Free DC). If your home was built before 1960, treat lead as a real possibility until the service line is confirmed.
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
DC Water
- Hardness
- 4 to 7 grains per gallon
- Moderately hard
- Disinfectant
- Chloramine
- Needs catalytic carbon
- Source
- Potomac River, treated by the Washington Aqueduct (Dalecarlia and McMillan plants)
DC water is only moderately hard, so the softener conversation is about comfort and appliance life rather than heavy scale. The bigger issues for DC homeowners are chloramine taste and the age of home plumbing.
Checked September 2026. Source: DC Water drinking water quality FAQ.
Homes in Capitol Hill
Capitol Hill is 1880s to 1920s rowhouses, many with English basements and mechanical rooms the size of a closet. We use compact softeners and route drain lines carefully, and we always ask whether the lead service line has been replaced.
What we usually install here
For rowhouses and single-family homes, a compact softener with catalytic carbon plus under-sink reverse osmosis. For condos and apartments, an under-sink reverse osmosis system certified for lead and PFAS is the right-sized answer.
Capitol Hill 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 Capitol Hill
How it works in Capitol Hill
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.
Capitol Hill neighborhoods we serve
- Eastern Market
- Lincoln Park
- Hill East
- Barracks Row
- Navy Yard
- H Street
- Kingman Park
- Stanton Park
ZIP codes: 20002, 20003
Capitol Hill water questions
How hard is the water in Capitol Hill?
Capitol Hill is served by DC Water. The utility reports 4 to 7 grains per gallon, which is moderately hard. DC Water describes its water as moderately hard and publishes a range of 70 to 120 ppm, which is roughly 4 to 7 grains per gallon.
Does Capitol Hill tap water contain chloramine?
Yes. DC Water uses chloramine year-round. It is gentler on taste than free chlorine but harder to filter; catalytic carbon media is required. That is why we use catalytic carbon in every Capitol Hill whole-home system instead of standard carbon.
How much does a water softener cost in Capitol Hill?
$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 Capitol Hill 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 Capitol Hill water safe to drink?
Yes. DC Water 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.