Type “Wichita water hardness” into a search engine and you will get a number right away. You will also get a different number on the next result. We checked two of them: one says 8.8 grains per gallon, the other says 8.1. Neither cites a document. Both companies sell water softeners.
So we went and read the measurements instead. Here is what is actually in them, and here is the part nobody selling softeners around here wants to lead with: the honest answer is a range, not a number, and the reason why is interesting.
Wichita runs on two completely different waters
The city draws from Cheney Reservoir on the surface and the Equus Beds aquifer underground. They do not measure the same, and the US Geological Survey has measured both.
Cheney Reservoir. USGS collected 44 samples at station 07144790 between October 2014 and September 2021. Hardness ranged from 130 to 220 mg/L as calcium carbonate, with a mean of 173 and a median of 170. Divide by 17.1 and that is roughly 8 to 13 grains per gallon. Total dissolved solids ran 325 to 554 mg/L.
The Equus Beds. USGS monitoring wells in the aquifer read higher. The deep index wells came in at 240 to 270 and 190 to 300 mg/L. One shallow well read 340 to 410 mg/L, which is 20 to 24 grains per gallon. One other shallow well, heavily influenced by recharge, read 26 to 44 — which tells you how much the aquifer varies within itself.
Two things to be careful about here, and we would rather say them than let you read past them. These are measurements of source water, not of what arrives at your tap. And the monitoring wells are monitoring wells, not drinking water wells.
And the blend has not changed yet, but it is going to
In October 2024 the city cut the ribbon on a new treatment plant. It is a 120-million-gallon-a-day facility built to replace one that is eighty years old, and it is not treating Wichita’s water yet. It was due to begin operating in April 2025. The date has moved more than once — the reason reported most recently was a design fault in the clarifiers, the first stage of treatment — and the eighty-year-old plant is still doing the job.
Here is the part that matters for your house. The plant currently running can only treat a blend of the reservoir and the aquifer. The new one is built to treat any blend, or either source on its own. That is good engineering and it is good drought planning. It also means that when it finally starts, the water in your pipes will not be the water that is in them today, nobody will send you a letter about it, and the scale on your fixtures is not going to tell you either.
What we could not find out, and are not going to guess
The city publishes an annual water quality report at wichita.gov/CCR, and that report is where a tap-water hardness figure would live if one is published. We could not read it — the city's website returns an error to anything that is not a person sitting in a browser.
So this page does not print a tap figure, because we have not seen one. If you open that report yourself and it has a hardness row in it, send it over and we will put the number on our Your Water page with the city credited. That is a genuine offer and it would make this page better.
We will also not tell you the city softens your water before it reaches you. You will find that claim online. The most prominent page making it is about Wichita Falls, Texas — a different city, three hundred miles away — and the rest are selling softeners.
Outside the mains it is a different question entirely
The Kansas Geological Survey sampled 297 wells, test holes, springs and municipal systems across Sedgwick County. Hardness ran from 50 ppm to 2,211 ppm. Chloride ran from 4 to 1,695. Nitrate ran from zero to 567.
That survey is from 1965 and we are not quoting it as today's number. We are quoting it because the ground has not moved. Two neighbors on two wells can have water that is nothing alike, and no website can tell either of them which one they have.
The only answer that describes your house
Comes from looking at your house. The water assessment is free, it stays free whether you buy anything or not, and it involves going through the published data for your actual supply rather than reading you a number off a map.
That is not a sales line, it is just what follows from everything above. In a city that blends two measurably different sources, and that is waiting on a new plant able to run either of them alone, a range is the honest answer and a single confident number is a tell.
Sources. USGS Scientific Investigations Report 2023-5037, Kramer and Puls, Documentation of Linear Regression Models… North Fork Ninnescah River and Cheney Reservoir, Kansas, 2014–21. USGS Scientific Investigations Report 2010-5023 on the Equus Beds aquifer. Kansas Geological Survey, Geohydrology of Sedgwick County, 1965. KWCH, 4 October 2024, on the Northwest Water Facility ribbon-cutting, and KWCH, 6 January 2026, on the clarifier design fault that delayed it. KNSS, 28 July 2026, on the repair and testing status. All are linked from our Your Water page, so you can read them yourself.