Rapid City Tap Water Quality Report
Limited testing on file — only PFAS results from EPA's UCMR 5 for RAPID CITY. No other contaminant results are on file for RAPID CITY; check its latest Consumer Confidence Report for its current test results.
People Served
72,009
Health-based violations since 2020
0
RAPID CITY. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Jul 2025 · RAPID CITY
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Rapid City Tap Water Safe to Drink?
Only PFAS results from EPA's UCMR 5 are on file for Rapid City's own water system, so everything else listed below has no result behind it. Testing your own water is the way to find out what your tap is actually delivering.
RAPID CITY, Rapid City's water system, serves 72,009 people. 5 other systems also serve parts of Rapid City. Each system's results are listed under its own name, never added to RAPID CITY's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for RAPID CITY is from Jul 2025.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in South Dakota
Rapid City Water Service Areas
What these numbers actually mean for Rapid City, SD
We read Rapid City, SD’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 23 contaminants listed, only PFAS results from EPA's UCMR 5 on file
- 23 PFAS compounds on record
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General-Purpose Water Filters for Rapid City
Rapid City's results show no result above EPA's health goals or legal limits, so these are general-purpose NSF/ANSI 53 certified filters, not chosen for any contaminant.
Pentair Residential Filtration, LLC
Everpure Residential H-300-NXT
NSF Certified:
Capacity
3001 gal
Filter Life
10 mo
Flow Rate
0.5 gpm
Removes 5 contaminants:
Whirlpool Corporation
W11256135
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.7 gpm
Removes 19 contaminants:
+14 more
Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Tetrachloroethylene, Toxaphene, Turbidity
Whirlpool Corporation
W11569861
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.52 gpm
Removes 22 contaminants:
+17 more
Atrazine, Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Styrene, Tetrachloroethylene, Toxaphene, Trichloroethylene, Turbidity
Santevia
Bath Filter
NSF Certified:
Flow Rate
0.36 gpm
Highlights:
- Organic cotton design reduces plastic used in construction
- Affordable upfront & ongoing cost
- The only bath filter that removed 100% chlorine with “normal” faster faucet flow
Removes 1 contaminants:
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Rapid City's water readings can explain
Utility-reported data for Rapid City includes a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Rapid City, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Rapid City? Public-water results do not apply to private wells. See Pennington County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Rapid City
Rapid City's tap water measures 7.3 grains per gallon (124.0 mg/L) — hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 7.3 gpg water in Rapid City — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For South Dakota as a whole, read water softener cost in South Dakota — priced against the plumber wage published for the state.
Frequently Asked Questions About Rapid City Tap Water
Limited testing on file — only PFAS results from EPA's UCMR 5 for RAPID CITY. No other contaminant results are on file for RAPID CITY; check its latest Consumer Confidence Report for its current test results.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach RAPID CITY. For a problem with your water now (discolored water, no water, low pressure, a leak), contact RAPID CITY directly.
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