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Community Water System · PWS SD4602210

Rendezvous Ranch

Black Hawk, South Dakota 57718 - drinking water served from groundwater sources to 195 people, tracked in EPA SDWIS and UCMR5.

195
People served
102
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 102 drinking-water violations at Rendezvous Ranch - above the South Dakota per-system average.

102
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
195
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rendezvous Ranch

Rendezvous Ranch is a private-owned community water system that delivers drinking water to 195 residents in Black Hawk, South Dakota (Lawrence County) through 78 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 102 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 100 monitoring and reporting violations are on file. The most recent violation on record dates to 2007.

The most frequently cited contaminant at this system is cis-1,2-Dichloroethylene, recorded in 2 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%).

Rendezvous Ranch's 102 violations sit above the South Dakota average.

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
195
Total Violations
102
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
78
County
Lawrence
School/Daycare
No
MCL Violations
0
Monitoring Violations
100
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
cis-1,2-Dichloroethylene MR 2 2002
Vinyl chloride MR 2 2002
1,1,1-Trichloroethane MR 2 2002
Ethylbenzene MR 2 2002
1,2,4-Trichlorobenzene MR 2 2002
Xylenes, Total MR 2 2002
1,1-Dichloroethylene MR 2 2002
Carbon tetrachloride MR 2 2002
CHLOROBENZENE MR 2 2002
o-Dichlorobenzene MR 2 2002
Benzene MR 2 2002
p-Dichlorobenzene MR 2 2002
Heptachlor MR 2 2002
Heptachlor epoxide MR 2 2002
Atrazine MR 2 2002
Benzo(a)pyrene MR 2 2002
Methoxychlor MR 2 2002
Total Polychlorinated Biphenyls (PCB) MR 2 2002
Di(2-ethylhexyl) adipate MR 2 2002
Di(2-ethylhexyl) phthalate MR 2 2002
Endrin MR 2 2002
HEXACHLOROBENZENE MR 2 2002
Chlordane MR 2 2002
Toxaphene MR 2 2002
Simazine MR 2 2002
Carbofuran MR 2 2002
OXAMYL MR 2 2002
2,4,5-TP MR 2 2002
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2002
ETHYLENE DIBROMIDE MR 2 2002

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
11Cl-PF3OUdS 6/5/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 6/5/2023 <2.00 ppt 2.00 ppt Not Detected
PFUnA 6/5/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/5/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/5/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 6/5/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 6/5/2023 <6.00 ppt 6.00 ppt Not Detected
ADONA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 6/5/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/5/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 6/5/2023 <8.00 ppt 8.00 ppt Not Detected
NEtFOSAA 6/5/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 6/5/2023 <20.00 ppt 20.00 ppt Not Detected
PFMBA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/5/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 6/5/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/5/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/5/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/5/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 6/5/2023 <7.00 ppt 7.00 ppt Not Detected
11Cl-PF3OUdS 2/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 2/26/2024 <2.00 ppt 2.00 ppt Not Detected
PFHxA 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 2/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 2/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 2/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFNA 2/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 2/26/2024 <20.00 ppt 20.00 ppt Not Detected
4:2 FTS 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 2/26/2024 <2.00 ppt 2.00 ppt Not Detected
PFPeS 2/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFEESA 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeA 2/26/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 2/26/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 2/26/2024 <5.00 ppt 5.00 ppt Not Detected

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 Rendezvous Ranch.

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 SD4602210 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
2007 Consumer Confidence Rule Other 2 SDWIS / SD4602210 / 7000
2002 cis-1,2-Dichloroethylene MR 2 SDWIS / SD4602210 / 2380
2002 Vinyl chloride MR 2 SDWIS / SD4602210 / 2976
2002 1,1,1-Trichloroethane MR 2 SDWIS / SD4602210 / 2981
2002 Ethylbenzene MR 2 SDWIS / SD4602210 / 2992
2002 1,2,4-Trichlorobenzene MR 2 SDWIS / SD4602210 / 2378
2002 Xylenes, Total MR 2 SDWIS / SD4602210 / 2955
2002 1,1-Dichloroethylene MR 2 SDWIS / SD4602210 / 2977
2002 Carbon tetrachloride MR 2 SDWIS / SD4602210 / 2982
2002 CHLOROBENZENE MR 2 SDWIS / SD4602210 / 2989
2002 o-Dichlorobenzene MR 2 SDWIS / SD4602210 / 2968
2002 Benzene MR 2 SDWIS / SD4602210 / 2990
2002 p-Dichlorobenzene MR 2 SDWIS / SD4602210 / 2969
2002 Heptachlor MR 2 SDWIS / SD4602210 / 2065
2002 Heptachlor epoxide MR 2 SDWIS / SD4602210 / 2067

How Rendezvous Ranch Compares

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

Metric Rendezvous Ranch South Dakota avg Federal benchmark
Total violations 102 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 195 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Rendezvous Ranch water safe to drink? ▼
Rendezvous Ranch (PWS ID: SD4602210) has 102 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 195 people using Groundwater sources.
How many people does Rendezvous Ranch serve? ▼
Rendezvous Ranch serves 195 people in Black Hawk, South Dakota. It is a Private-owned system using Groundwater water sources with 78 service connections.
What type of violations does Rendezvous Ranch have? ▼
Rendezvous Ranch has 102 total violations: 0 health-based violations (MCL exceedances or treatment failures), 100 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rendezvous Ranch water? ▼
No. Rendezvous Ranch was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Rendezvous Ranch use? ▼
Rendezvous Ranch 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.