TapMatch

Denver, Colorado

Denver Water 2026 WQR: total hardness about 105 mg/L (55–124). Chloramine residual. Moderately hard mountain water, not a desert sizing file.

Water utility
Denver Water
Sanitation district
Metro Water Recovery / City wastewater (confirm on the sewer bill)
Salt / brine discharge
No district prohibition found in current research. No Denver Water or Metro Wastewater prohibition comparable to LACSD Measure S turned up. Ask the sewer utility on the bill. This is not a legal opinion.
Hardness (as published)
2025 sampling in the 2026 Water Quality Report: total hardness average 105,009 ppb (about 105 mg/L as CaCO3), range 55,000–124,000 ppb (55–124 mg/L). Moderately hard on the USGS scale. — Denver Water 2026 Water Quality Report (2025 data)
Disinfectant (as published)
Total chlorine residual in the distribution system (chloramine). Denver Water reports total chlorine, not free-chlorine-only. — Denver Water 2026 Water Quality Report; Denver Water treated-water reporting practice (total chlorine)

What actually fits

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If soap will not lather and the glassware looks chalky

Two tall mineral tanks and a black brine tank of a salt-based water softener, plumbed with copper pipe in a garage.
Salt-based softener: two mineral tanks and a brine tank.

A salt-based softener is the thing that actually removes hardness. Size it from your grains and how much water you use, not bathroom count. It needs a drain.

Shop salt-based softeners

If you only want less scale and you hate salt bags

A single tall tank with no brine tank, installed in a laundry alcove next to a washing machine.
Salt-free conditioner: one tank, no salt bin.

A salt-free conditioner changes how scale sticks. It does not soften. Soap and spots stay closer to untreated. No brine line.

Shop salt-free conditioners

If the water tastes like pool-plus-ammonia

A single black whole-house carbon tank with a control head, installed in a garage and connected to copper pipe.
Whole-house carbon tank. No brine tank.

Catalytic carbon with a chloramine claim (NSF/ANSI 42 for chloramine). Regular chlorine carbon is the wrong box.

Shop catalytic carbon for chloramine

If you are shopping a PFAS listing for the kitchen

Under-sink reverse osmosis system with a white storage tank, filter canisters, and colored tubing in a kitchen cabinet.
Under-sink reverse osmosis: filters, tank, and a second faucet.

A pitcher or under-sink RO whose exact model is listed for PFAS under NSF/ANSI 53 or 58. The RO shop link is Waterdrop. Pitchers stay on a tagged Amazon search. We have not picked a model.

Shop Waterdrop reverse osmosisShop PFAS-listed pitchers

If you have not tested the tap

A homeowner kit is a start. It is not a state-certified lab. Use a certified lab when the decision is expensive.

Shop water test kits

Denver is a moderately hard, chloramine file. Snowmelt is not Las Vegas.

What Denver Water prints

The 2026 report (2025 samples) lists total hardness averaging ~105 mg/L, range 55–124 mg/L. They print it in ppb (105,009 ppb). That is the same number.

Disinfectant residual is reported as total chlorine — the chloramine residual in the pipes. A chlorine-only carbon listing is the wrong box.

Salt discharge

unrestricted-as-of-research.

What to match here

Updated August 30, 2026. Adding another city is a new Markdown file in src/content/cities, not a rewrite of this page.