No district prohibition found in current research. No City of Houston prohibition comparable to LACSD Measure S turned up. Municipal utility districts outside the city limits are not this ordinance search. Ask the sewer provider on the bill.
Hardness (as published)
2025 main-system table: total hardness as CaCO3 minimum 43.5, average 135.5, maximum 229 ppm. — Houston Water Quality Report, January–December 2025 (main system)
Disinfectant (as published)
Chloramines in the distribution system (printed on the 2025 report). Some satellite systems list chlorine separately — read the table for your PWS. — Houston Water Quality Report 2025
What actually fits
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If soap will not lather and the glassware looks chalky
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.
If you are shopping a PFAS listing for the kitchen
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.
Houston is a range file. Trinity and San Jacinto surface water plus wells. The main-system CCR is not your MUD.
What the 2025 report prints
Main-system total hardness 43.5–229 ppm, average 135.5. That is moderate to hard depending on the blend. Iron appears on secondary tables with a range — not a reason to prescribe a well iron filter for every Houston address.
Chloramines are listed for the main distribution system.
Salt discharge
unrestricted-as-of-research for the city. A Fort Bend MUD is someone else’s paperwork.
