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PONDEROSA RIDGE

PWS ID: SD4600863 · RAPID CITY, South Dakota 57702

PONDEROSA RIDGE serves 90 people in RAPID CITY, South Dakota using Groundwater water sources. It has 117 recorded EPA violations, including 21 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: PONDEROSA RIDGE

PONDEROSA RIDGE is a private-owned community water system that delivers drinking water to 90 residents in RAPID CITY, South Dakota (Pennington County) through 33 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 117 total violations for this system , of which 21 (18%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 79 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 21 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across South Dakota, EPA tracks 654 public water systems serving 915,901 people, with 56,254 cumulative violations and 8,399 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 86 violations. PONDEROSA RIDGE's 117 violations sit above the South Dakota average. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
90
Total Violations
117
Health-Based Violations
21
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
33
County
Pennington
School/Daycare
No
MCL Violations
21
Monitoring Violations
79
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 21 2015
Coliform (TCR) MR 10 2009
Revised Total Coliform Rule MON 6 2022
E. COLI MR 3 2023
Coliform (TCR) Other 3 2000
Consumer Confidence Rule Other 2 2007
Arsenic MR 2 1988
Barium MR 2 1988
Cadmium MR 2 1988
Fluoride MR 2 1988
Mercury MR 2 1988
Vinyl chloride MR 2 1995
Ethylbenzene MR 2 1995
1,1-Dichloroethylene MR 2 1995
Carbon tetrachloride MR 2 1995
CHLOROBENZENE MR 2 1995
Styrene MR 2 1995
Benzene MR 2 1995
1,2-Dichloroethane MR 2 1995
Toluene MR 2 1995
Lead and Copper Rule MR 2 1995
1,2-Dichloropropane MR 2 1995
DICHLOROMETHANE MR 2 1995
p-Dichlorobenzene MR 2 1995
1,2,4-Trichlorobenzene MR 2 1995
o-Dichlorobenzene MR 2 1995
Trichloroethylene MR 2 1995
Tetrachloroethylene MR 2 1995
Chromium MR 2 1988
Xylenes, Total MR 2 1995

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for PONDEROSA RIDGE.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID SD4600863 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

South Dakota Drinking Water Authority

South Dakota's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find SD regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2023 E. COLI MR 3 SDWIS / SD4600863 / 3014
2022 Revised Total Coliform Rule MON 6 SDWIS / SD4600863 / 8000
2015 Coliform (TCR) MCL 21 SDWIS / SD4600863 / 3100
2009 Coliform (TCR) MR 10 SDWIS / SD4600863 / 3100
2007 Consumer Confidence Rule Other 2 SDWIS / SD4600863 / 7000
2000 Coliform (TCR) Other 3 SDWIS / SD4600863 / 3100
1995 Vinyl chloride MR 2 SDWIS / SD4600863 / 2976
1995 Ethylbenzene MR 2 SDWIS / SD4600863 / 2992
1995 1,1-Dichloroethylene MR 2 SDWIS / SD4600863 / 2977
1995 Carbon tetrachloride MR 2 SDWIS / SD4600863 / 2982
1995 CHLOROBENZENE MR 2 SDWIS / SD4600863 / 2989
1995 Styrene MR 2 SDWIS / SD4600863 / 2996
1995 Benzene MR 2 SDWIS / SD4600863 / 2990
1995 1,2-Dichloroethane MR 2 SDWIS / SD4600863 / 2980
1995 Toluene MR 2 SDWIS / SD4600863 / 2991

How PONDEROSA RIDGE Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric PONDEROSA RIDGE South Dakota avg Federal benchmark
Total violations 117 86 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 21 12.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 85.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 90 1,400 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 654 regulated public water systems in South Dakota.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is PONDEROSA RIDGE water safe to drink? ▼
PONDEROSA RIDGE (PWS ID: SD4600863) has 117 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 90 people using Groundwater sources.
How many people does PONDEROSA RIDGE serve? ▼
PONDEROSA RIDGE serves 90 people in RAPID CITY, South Dakota. It is a Private-owned system using Groundwater water sources with 33 service connections.
What type of violations does PONDEROSA RIDGE have? ▼
PONDEROSA RIDGE has 117 total violations: 21 health-based violations (MCL exceedances or treatment failures), 79 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in PONDEROSA RIDGE water? ▼
No PFAS testing data is available for PONDEROSA RIDGE under the EPA's UCMR5 monitoring program.
What water source does PONDEROSA RIDGE use? ▼
PONDEROSA RIDGE uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial