Montclair is covered by the Inland Empire Utilities Agency ordinance, which prohibits new self-regenerating salt water softeners here as it does in Chino, Chino Hills, Fontana, Ontario, Rancho Cucamonga and Upland.
Existing units are grandfathered and IEUA pays a rebate for removal. New installations are not permitted, and when an existing unit fails it cannot be replaced with another salt softener.
Hardness in Montclair
Montclair is served by Monte Vista Water District. We do not publish a hardness figure we have not measured, so we test at your hose bib before we quote.
Can you install a water softener in Montclair?
Not a new self-regenerating salt one. The ordinance addresses brine discharge, which enters the wastewater system on every regeneration cycle and accumulates in the regional groundwater basin.
A unit installed before the ordinance may keep operating. The restriction bites at replacement time, which is when most Montclair homeowners first hear about it.
What we install in Montclair instead
A 10 GPM standard salt-free whole-home water conditioning system, $2,495 installed with equipment and professional installation included. It is sized for homes up to 3 bathrooms; larger homes are quoted separately. It conditions hardness minerals through template assisted crystallization so they stop forming scale, rather than removing them.
It pairs that with whole-home carbon filtration for chlorine taste and odor. No salt, no drain line, no regeneration, no monthly fees. Annual maintenance is a single inexpensive filter cartridge.
How hard is the water in Montclair?
Monte Vista Water District serves Montclair, drawing on Chino Basin groundwater alongside imported supply. We have not measured Montclair hardness consistently enough to publish a figure, and basin readings vary by well field.
We test at your hose bib before quoting. It is a few minutes of work and it is more useful than any district average.
A compact city with mid-century housing
Montclair is one of the smaller cities in the area and a large share of its housing dates from the 1950s and 1960s, built out during the postwar expansion along the Foothill corridor.
That building era means no treatment loop roughed in, generally modest lot sizes, and utility spaces sized for the equipment of the time. On homes of that age we also keep an eye out for original galvanized supply line, which hard water narrows from the inside. Salt-free equipment fits these properties well precisely because it needs no drain line to route.
The full ordinance, and the rebate
We wrote a longer page on the IEUA ordinance, which cities it covers, how the grandfathering works, and how the removal rebate is claimed.
Read our salt-free water conditioning guideWater filtration questions from Montclair homeowners
Are water softeners banned in Montclair?
Who supplies water in Montclair?
How much is a salt-free system in Montclair?
Nearby cities we serve
- Water filtration in Upland
- Water filtration in Ontario
- Water filtration in Chino
- Water filtration in Rancho Cucamonga
Not sure which system fits your home? Read our water system guide, or see the main water filtration page for how the options compare.
The $2,495 price is for the 10 GPM standard system, sized for homes up to 3 bathrooms. Homes with 4 or more bathrooms need the 15 GPM system, quoted separately after the on-site walkthrough. Any water line run required by the location of your main is quoted separately in writing after the on-site walkthrough. Taxes and payment processing fees are not included. Price confirmed in writing before any work starts.