Water Softeners & Filtration Across Niagara

St. Catharines & Thorold

7–10 gpg · Welland Canal · Chlorinated · Moderately hard

How hard is St. Catharines water? Moderately hard — about 7–10 grains per gallon from the Decew Falls plant, which also serves much of Thorold. That's enough scale-forming hardness for a softener to protect your fixtures and water heater, and a reverse-osmosis system at the kitchen tap removes the chlorine taste from your drinking water — while a whole-home chlorine filter takes it out of every tap and shower in the house.

Niagara Falls

7–10 gpg · Niagara River · Chlorinated · Moderately hard

What does Niagara Falls water need? It's moderately hard — around 7–10 grains per gallon from the Niagara River — so a softener is a worthwhile upgrade for scale, paired with reverse osmosis for removing the chlorine taste.

Welland & Fort Erie

5–7 gpg · Welland Canal · Chlorinated · Moderately soft

Is Welland water soft? It's the softest in Niagara — about 5–7 grains per gallon, with Fort Erie similar. That's gentle enough that a softener is optional polish rather than essential here, while the real win is taste: a reverse-osmosis system clears the chlorine from your drinking water at the kitchen tap, and a whole-home chlorine filter removes it from the rest of the house, showers included.

What we install

What King Plumbing installs across Niagara

Across Niagara the water is moderately hard at most addresses and softer in Welland and Fort Erie, so the common setup is a softener sized to your hardness plus reverse osmosis for chlorine taste. Rural homes around Grimsby and Lincoln on private wells may need UV and iron treatment. Everything is owned outright, never rented — the free assessment turns your address into a specific recommendation.

Questions, answered

Niagara water — FAQ