Rapid City Water Quality

Compiled by PlainEnviro · August 25, 2026

South Dakota

Health Violations

According to EPA SDWIS, Rapid City, South Dakota is served by 44 community water systems covering about 92,984 people. The same extract lists 54 health-based violation records, most recently coded 0400 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.

Water Systems

92,984

Population Served

Health-Based Violation Records

Distinct Contaminant Codes

Drinking water in Rapid City, South Dakota is delivered through 44 EPA-regulated community water systems serving an estimated 92,984 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.

PlainEnviro's health-based SDWIS extract shows 54 violation records across the 44 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 5 distinct EPA contaminant codes: Stage 1 Disinfectants and Disinfection Byproducts Rule, Combined Radium (-226 and -228), Revised Total Coliform Rule, Groundwater Rule, Coliform (TCR). 7 TRI-reporting industrial facilities are also located within the city limits.

A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the South Dakota drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.

Community Water Systems

System Name	Pop. Served	Source	Violations	Status
RAPID CITY	72,009	Surface Water	0	Clean
RAPID VALLEY SANITARY DISTRICT	11,408	Surface Water	0	Clean
COLONIAL PINE HILLS SANITARY DISTRIC	1,200	Groundwater	0	Clean
CHAPEL LANE WATER COMPANY	1,200	Groundwater	1	Health
WONDERLAND HOMES	750	Groundwater	1	Health
SUN VALLEY DEVELOPMENT	650	Groundwater	1	Health
HISEGA MEADOWS WATER INC	491	Surface Water	0	Clean
HART RANCH	438	Groundwater	0	Clean
PINE GROVE	425	Groundwater	0	Clean
SOUTH CANYON COUNTRY ESTATES	420	Groundwater	0	Clean
THE RANCH AT BLACK GAP	375	Groundwater	1	Health
PRAIRIE ACRES LLC	350	Groundwater	2	Health
STAGEBARN SANITARY DISTRICT	295	Groundwater	1	Health
PRAIRIE ACRES NORTH	288	Groundwater	5	Health
CARRIAGE HILLS	267	Groundwater	1	Health
HAPPY HOLIDAY RV RESORT	264	Groundwater	1	Health
BOULDER PARK WATER USERS ASSOCIATION	200	Groundwater	1	Health
PRAIRIE ACRES SOUTH	170	Groundwater	5	Health
STRATO RIM ESTATES WATER COMPANY	170	Groundwater	0	Clean
PONDEROSA MOBILE HOME RANCH	150	Groundwater	3	Health
B & J MOBILE HOME PARK	135	Groundwater	1	Health
MIDLAND HEIGHTS	130	Groundwater	1	Health
EAST RIDGE ACRES	118	Groundwater	1	Health
ELK CREEK VILLAGE	110	Groundwater	1	Health
PONDEROSA RIDGE	98	Groundwater	1	Health
SPEARFISH MEADOWS	87	Groundwater	1	Health
ROCK RIDGE COURT	74	Groundwater	1	Health
SIPHON HILL WATER ASSOCIATION	68	Groundwater	4	Health
ELK VALLEY RANCHETTES	62	Groundwater	1	Health
ELK CREEK VALLEY VIEW ASSOC	52	Groundwater	1	Health
PONDEROSA PARK	50	Groundwater	0	Clean
WEST NIKE SUBDIVISION	50	Groundwater	0	Clean
WHISPERING PINES WATER ASSOCIATION	48	Groundwater	0	Clean
GOLDEN HILLS HOMES	47	Groundwater	1	Health
BOXELDER HIGH COUNTRY ASSOCIATION	45	Groundwater	0	Clean
CEDAR GULCH 1	45	Groundwater	5	Health
HIGHLAND HILLS	38	Groundwater	3	Health
HAPPY HOLIDAY WATER ASSOCIATION	35	Groundwater	1	Health
RIMROCK RIDGE WATER ASSOCIATION	35	Groundwater	0	Clean
RIMROCK HEIGHTS HOMEOWNERS ASSOCIATI	35	Groundwater	0	Clean
HIDDEN VALLEY WATER ASSOCIATION INC	27	Groundwater	2	Health
DARLINGTON ESTATES	25	Groundwater	4	Health
PONDEROSA WATER COMPANY	25	Groundwater	1	Health
PINEVIEW WATER ASSOCIATION	25	Groundwater	1	Health

Does this city have health-based water violations?

These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.

Water system	Contaminant	Category	Begin Date	End Date	Enforcement
DARLINGTON ESTATES	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2025-11-12	Ongoing	2600004
DARLINGTON ESTATES	Combined Radium (-226 and -228)	MCL	2025-10-01	2025-12-31	2600002
HAPPY HOLIDAY WATER ASSOCIATION	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2025-07-07	Ongoing	2500001
DARLINGTON ESTATES	Combined Radium (-226 and -228)	MCL	2025-07-01	2025-09-30	2500003
DARLINGTON ESTATES	Combined Radium (-226 and -228)	MCL	2025-07-01	2025-09-30	2500001
CEDAR GULCH 1	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2025-02-01	Ongoing	2500283
CEDAR GULCH 1	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2025-02-01	Ongoing	2500282
ROCK RIDGE COURT	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2024-05-21	Ongoing	2400607
HIGHLAND HILLS	Revised Total Coliform Rule	MCL	2023-07-01	2023-07-31	2300101
HIGHLAND HILLS	Revised Total Coliform Rule	MCL	2023-07-01	2023-07-31	2300101
HIGHLAND HILLS	Revised Total Coliform Rule	MCL	2023-07-01	2023-07-31	2300101
ELK CREEK VALLEY VIEW ASSOC	Groundwater Rule	TT	2019-11-24	Ongoing	2000002
PRAIRIE ACRES NORTH	Groundwater Rule	TT	2019-10-08	Ongoing	2000249
PRAIRIE ACRES NORTH	Groundwater Rule	TT	2019-10-08	Ongoing	2000249
PRAIRIE ACRES SOUTH	Groundwater Rule	TT	2019-10-08	Ongoing	2000380
PRAIRIE ACRES SOUTH	Groundwater Rule	TT	2019-10-08	Ongoing	2000380
HAPPY HOLIDAY RV RESORT	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2019-06-10	Ongoing	1900264
PRAIRIE ACRES LLC	Groundwater Rule	TT	2018-11-20	Ongoing	1900191
PRAIRIE ACRES LLC	Groundwater Rule	TT	2018-11-20	Ongoing	1900191
CEDAR GULCH 1	Groundwater Rule	TT	2018-10-23	Ongoing	1900278
PONDEROSA MOBILE HOME RANCH	Groundwater Rule	TT	2017-11-30	Ongoing	1800125
PONDEROSA MOBILE HOME RANCH	Groundwater Rule	TT	2017-11-30	Ongoing	1800125
PONDEROSA MOBILE HOME RANCH	Groundwater Rule	TT	2017-11-30	Ongoing	1800125
HIDDEN VALLEY WATER ASSOCIATION INC	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2017-10-01	Ongoing	1800052
CEDAR GULCH 1	Revised Total Coliform Rule	TT	2017-04-13	Ongoing	1700236
SPEARFISH MEADOWS	Groundwater Rule	TT	2016-10-01	Ongoing	1700396
CEDAR GULCH 1	Groundwater Rule	TT	2016-04-01	Ongoing	1600226
HIDDEN VALLEY WATER ASSOCIATION INC	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2016-02-01	Ongoing	1600047
PONDEROSA RIDGE	Coliform (TCR)	MCL	2015-12-01	2015-12-31	1600099
SUN VALLEY DEVELOPMENT	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500002
ELK CREEK VILLAGE	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500230
GOLDEN HILLS HOMES	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500007
THE RANCH AT BLACK GAP	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500002
ELK VALLEY RANCHETTES	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500002
STAGEBARN SANITARY DISTRICT	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500071
PINEVIEW WATER ASSOCIATION	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500021
PONDEROSA WATER COMPANY	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500118
B & J MOBILE HOME PARK	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500005
BOULDER PARK WATER USERS ASSOCIATION	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500093
EAST RIDGE ACRES	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500023
PRAIRIE ACRES NORTH	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500243
MIDLAND HEIGHTS	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500022
PRAIRIE ACRES SOUTH	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500375
WONDERLAND HOMES	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500023
SIPHON HILL WATER ASSOCIATION	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500727
CARRIAGE HILLS	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500007
CHAPEL LANE WATER COMPANY	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2015-02-01	Ongoing	1500008
PRAIRIE ACRES NORTH	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2011-03-08	Ongoing	1100241
PRAIRIE ACRES SOUTH	Stage 1 Disinfectants and Disinfection Byproducts Rule	TT	2011-03-08	Ongoing	1100373
SIPHON HILL WATER ASSOCIATION	Groundwater Rule	TT	2010-08-03	Ongoing	1000725

What are Rapid City's health-based records for?

Rapid City's health-based violation records carry 5 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.

Contaminant	Records	Systems	Most recent
Stage 1 Disinfectants and Disinfection Byproducts Rule	32	24	2025-11-12
Groundwater Rule	14	8	2019-11-24
Revised Total Coliform Rule	4	2	2023-07-01
Combined Radium (-226 and -228)	3	1	2025-10-01
Coliform (TCR)	1	1	2015-12-01

TRI Facilities in Rapid City

Facility	Industry	Total Releases	Chemicals
Pete Lien & Sons Inc	Nonmetallic Mineral Product	193.6K lbs	7
Gcc Dacotah	Nonmetallic Mineral Product	130.1K lbs	9
Midwest Manufacturing Inc DBA Dakota Panel	Wood Products	11.8K lbs	2
Truenorth Steel - Rapid City	Fabricated Metals	79 lbs	2
Forterra Concrete Products - Rapid City	Nonmetallic Mineral Product	0 lbs	1
Forest Products Distributors Inc	Wood Products	0 lbs	3
Hubbard Feeds Inc	Food	0 lbs	2

Frequently Asked Questions

What does EPA SDWIS list for drinking water in Rapid City, South Dakota? ▼

Rapid City is listed with 44 EPA-regulated water systems covering approximately 92,984 people. 54 health-based violation records appear in the extract. A past registry row is not a current drinkability verdict; contact the local utility for current status.

How many water violations does Rapid City have in this EPA extract? ▼

Rapid City water systems have 54 health-based violation records in PlainEnviro's EPA SDWIS extract. This extract is filtered to EPA health-based records and does not include monitoring or reporting violations.

What contaminants were found in Rapid City water? ▼

Health-based records for Rapid City water systems carry the following EPA contaminant codes: Stage 1 Disinfectants and Disinfection Byproducts Rule, Combined Radium (-226 and -228), Revised Total Coliform Rule, Groundwater Rule, Coliform (TCR). This source edition does not include authoritative contaminant names. Source: EPA SDWIS.

How many water systems serve Rapid City? ▼

44 EPA-regulated community water systems serve Rapid City, South Dakota, collectively covering approximately 92,984 people. Data is from the EPA Safe Drinking Water Information System (SDWIS).

Where does Rapid City get its drinking water? ▼

Rapid City's water supply comes from 44 EPA-regulated community water systems. Source type data is not available for all systems. For detailed supply information, contact your local water utility. Source: EPA SDWIS.

Are there pollution sources near Rapid City? ▼

Yes, 7 EPA Toxic Release Inventory (TRI) facilities are registered in Rapid City, South Dakota, reporting a combined 335.5K lbs of toxic chemical releases. TRI data reflects self-reported emissions; it does not measure exposure or health effects. Source: EPA TRI.

How does Rapid City compare in South Dakota?

Of the 230 South Dakota places with at least one community water system on file, Rapid City ranks #1 by number of systems (44).

Either side of it: Black Hawk (41), Piedmont (25)

About This Data

Figures here are the current EPA SDWIS extract joined to the 44 community water systems whose service area lists Rapid City, ranked against the 230 South Dakota places with at least one system on file. Data current as of 2026-08-25.

Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.

A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.

TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro