Water Softener in Niwot, CO | Plumber Denver CO

Niwot's water comes from Left Hand Water District, which blends its own treated water with purchased supply from Boulder, Longmont and Central Weld County Water District. Left Hand's own hardness is not listed in its report, though the Central Weld portion is soft at about 33 mg/L, so a tap test is the best way to decide on a softener. Call the number on this page to be connected with a local plumber in Niwot.

Plumber connecting a water softener and whole-house filter, water softeners & filtration in Niwot, CO

What happens when you call

You will be connected with an independent plumber who serves Niwot. Explain what you are noticing: scale, spotting, a chlorine taste, or sediment. The plumber usually starts with a hardness test at the kitchen tap, looks at the water heater, and checks where the main enters. If the reading is low, as it may well be with Niwot's blended supply, expect advice to skip the softener and look at a filter or heater maintenance instead.

Cost factors

The hardness reading, which may rule out a softener
Carbon filtration for chlorine taste
Softener capacity and valve type, if one is warranted
Access to the main and a drain
Boulder County permit requirements

Call now to be connected with a local plumber in Niwot.

(303) 529-9880

Niwot's water and sewer

Left Hand Water District has served parts of Boulder, Weld and Broomfield counties since 1960. Its own supply comes from Lefthand Creek, Colorado-Big Thompson water from Carter Lake and the Williamson Ditch, and it buys water through connections with Central Weld County Water District and the cities of Boulder and Longmont. Water is disinfected with chlorine. The district's combined 2026 report does not state Left Hand's own hardness, but the Central Weld portion lists average total hardness of 33 mg/L, which is soft. Because the blend can vary, a reading from your own tap is more useful than any single figure.

Sewer is a separate district. Niwot Sanitation District collects and treats wastewater at its own plant, and it makes the property owner responsible for the whole sewer service line from the house to the main. Softener regeneration water travels through that private line.

Early Niwot residents relied on wells and cisterns before Left Hand's system arrived. Current well use was not verified, but if your property still has a working well, test it separately, since its water may be very different from the district's.

Niwot is unincorporated, so building permits come from Boulder County Community Planning and Permitting at the Courthouse Annex in Boulder.

Quick checklist

Confirm you are a Left Hand Water District customer
Note any scale, spotting or odor
Find the main shutoff
Know the age of your water heater

Water Softeners & Filtration questions in Niwot

Does my water provider publish a hardness number?

Left Hand's combined report does not list its own hardness. The Central Weld portion shows 33 mg/L, which is soft, but your tap may differ because of blending.

Will a softener get rid of chlorine or chloramine taste?

No. Left Hand disinfects with chlorine, and a basic carbon filter is what reduces that taste.

What should a private well be tested for before picking equipment?

If your Niwot property still uses a well, test it for hardness, iron, manganese, nitrate and bacteria. Its water can differ a lot from Left Hand's supply.

Where does the softener drain line go?

To a floor drain or standpipe with an air gap. In Niwot it then goes through your private sewer line to Niwot Sanitation District's plant.