Montclair, California
Inland Empire Utilities Agency Ordinance No. 109 § 2.6 prohibits installing, replacing, or enlarging a self-regenerating water softener that discharges to a community sewer tributary to the IEUA regional system. That is an IEUA regional sewer/POTW rule, not a statewide ban. Monte Vista Water District 2024 CCR prints hardness 125 ppm (range 100–220) and free chlorine 0.54 ppm (ND–1.66).
- Hardness125 ppm (range 100–220)
- Chlorine residual0.54 ppm (range ND–1.66)
- TTHMs59 ppb (range ND–77)
- HAA513 ppb (range ND–17)
Best match for Montclair
Portable-exchange softening — not a brine tank
A self-regenerating salt softener that drains to the sewer is prohibited here.
Portable-exchange tanks, if that exception applies at your address. The resin still removes hardness. The salt work happens off site. Do not install a self-regenerating unit to the sewer here.
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Other options that still fit
Salt-free conditioner
A salt-free conditioner changes how scale sticks. It does not soften. Soap and spots stay closer to untreated. No brine line.
Whole-house carbon for chlorine
That is chlorine. A whole-house carbon filter with an NSF/ANSI 42 chlorine claim is the usual match. A softener will not take chlorine out.
Under-sink reverse osmosis
The under-sink RO we actually run is Cloud RO — NSF/ANSI 58, kitchen tap, not a whole-house tank. Check the exact listing if PFAS is why you are shopping. Shop Amazon first for under-sink RO, or buy Cloud direct. Waterdrop is a tankless option if you want that path. A certifier-listed pitcher is the cheap first step. Nobody is paying for a medical claim.
Shop under-sink reverse osmosisBuy Cloud RO directShop Waterdrop reverse osmosisShop PFAS-listed pitchers
Test the tap first
A homeowner kit is a start. It is not a state-certified lab. Use a certified lab when the decision is expensive.
On the report
- Water utility
- Monte Vista Water District
- Hardness
- 125 ppm as CaCO3 (range 100–220). One hardness column. Monte Vista Water District 2024 CCR Table 2, sampled 2022 and 2024. — Monte Vista Water District 2024 Annual Water Quality Report, Table 2
- Disinfectant
- Chlorine residual 0.54 ppm (range ND–1.66), MRDL 4. Free chlorine, not chloramine. MVWD 2024 CCR Table 1. — Monte Vista Water District 2024 Annual Water Quality Report, Table 1
- Brine / salt to the sewer
- Self-regenerating salt softeners prohibited (district rule). Inland Empire Utilities Agency Ordinance No. 109 (Regional), § 2.6 Restrictions on Self-Regenerating Water Softening Appliances. The installation, replacement, or enlargement of any self-regenerating water softening appliance which discharges into the Community Sewer System that is tributary to the Regional Sewerage System shall not be allowed. Each Contracting Agency shall adopt a local ordinance to implement this restriction. This Section shall not apply to any portable exchange water softener of the type which is regenerated off-site at a lawfully regulated location. IEUA’s rebate page names Montclair among the contracting cities. That is an IEUA regional sewer/POTW rule — not a statewide ban. Ask Public Works or the agency on the sewer bill about the address.
Also around here
Extra context besides the utility report and the chart above — geology, an unregulated table, or a published study. Not a second set of printed tap numbers.
- MicroplasticsWHO’s 2019 review examined studies that found microplastic particles in treated tap and bottled water in many places. That is a published-occurrence finding, not a number from this city’s water-quality report, and we do not invent a particles-per-liter count for the tap.Microplastics in drinking-water — World Health Organization
- PFASEPA’s Fifth Unregulated Contaminant Monitoring Rule required community systems this size to test 29 PFAS and lithium in 2023–2025. Open the UCMR 5 Data Finder for this PWS. This file does not invent a detection.Fifth Unregulated Contaminant Monitoring Rule — U.S. Environmental Protection Agency
- Nitrate as NTable 1 on the same 2024 MVWD CCR. Cited as printed. This file does not invent a health ranking.2.5 ppm (range ND–5.9), MCL 10.2024 Annual Water Quality Report (PWS CA3610029) — Monte Vista Water District
IEUA regional sewer/POTW rule: Ordinance No. 109 § 2.6 says the installation, replacement, or enlargement of any self-regenerating water softening appliance that discharges into a community sewer tributary to the IEUA regional system shall not be allowed. Portable-exchange tanks regenerated off site are the exception the ordinance prints. That is a regional sewer-side rule, not a statewide ban. IEUA names Montclair among the contracting cities. Ask Public Works or the agency on the sewer bill about the address.
Drinking water is Monte Vista Water District, PWS CA3610029. The 2024 CCR Table 2 prints hardness 125 ppm (100–220) and sodium 30 ppm (14.7–35). Table 1 prints chlorine residual 0.54 ppm (ND–1.66) — free chlorine, not chloramine. TTHMs 59 ppb (ND–77). HAA5 13 ppb (ND–17).
Kitchen shopping stays the Cloud RO / Waterdrop path already used on other cities if a listing is why you are looking.
Sources
- Ordinance No. 109 § 2.6 Restrictions on Self-Regenerating Water Softening Appliances — Inland Empire Utilities Agency. Accessed 2026-09-10.
- Water Softener Removal Rebate Program (names Montclair as a contracting city) — Inland Empire Utilities Agency. Accessed 2026-09-10.
- 2024 Annual Water Quality Report (PWS CA3610029) — Monte Vista Water District / State Water Resources Control Board. Accessed 2026-09-10.
Updated September 10, 2026. A city file is chemistry we can cite plus the sewer rule. No invented detections.