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. EPA SDWIS lists this system's service population as 195 people using Groundwater sources.

How many people does Rendezvous Ranch serve?

EPA SDWIS reports that Rendezvous Ranch serves 195 people (this public water system's service population, not the municipal population of Black Hawk or any other city). It is a Private-owned system using Groundwater water sources with 78 service connections. The operator address is listed in Black Hawk, South Dakota.

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.

How does Rendezvous Ranch's violation count compare nationally?

Rendezvous Ranch has 102 recorded EPA SDWIS violations, fewer than 26% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 74% of that cohort has fewer violations than Rendezvous Ranch. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → South Dakota

Community Water System · PWS SD4602210

Rendezvous Ranch

Operator location Black Hawk, South Dakota - 0% of 102 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 195 served per SDWIS.

Compiled by PlainWater · May 15, 2026

195
People served (this PWS) Smaller third of systems: 102
EPA violations (this PWS) Upper third of systems: 0
Health-based (this PWS) Lower third by health-based share: No PFAS
UCMR5 (this PWS) Tested, none detected

Follow published updates (RSS)

Rendezvous Ranch standing, high SDWIS violation third

0% of 102 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). UCMR5: UCMR5 tested, none detected.

The verdict

Rendezvous Ranch sits in the upper third of the sitemap cohort by violation count (102), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (195; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is only 0% - almost all of this trail is monitoring or reporting. UCMR5 tested this system and reported no PFAS above the minimum reporting level.

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

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

C+

Water Safety Score

64/100

Rendezvous Ranch

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations A+

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

102

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination N/A

Tested, none detected

Highest PFAS compound level detected in UCMR5 testing

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

Violation Count vs. the National Corpus

Rendezvous Ranch has 102 recorded EPA violations, 74% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 26% carry more. 0% of this system's own violations are health-based (0 of 102), and it ranks unranked by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

102 Around the middle fewer violations than 26% of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

How many violations vs. how serious, among peer systems

Rendezvous Ranch plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Rendezvous Ranch. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

City of Ballinger: 372 violations, 85% health-based
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based
Rendezvous Ranch: 102 violations, 0% health-based (this system)

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

Health-based violations on Rendezvous Ranch

0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for SD4602210.

EPA SDWIS · PWS SD4602210

Sources: EPA SDWIS

Nationwide peers

102 violations · 195 served: nearest cross-state SDWIS matches.

Cross-state systems with comparable violation load

Nearest cross-state community systems (500+ served) by total SDWIS violations on record.

4 peers

What to do with Rendezvous Ranch

Use this system's EPA-reported record as a starting filter, not a final verdict.

See how every tracked system in South Dakota compares on the same EPA violation measures. South Dakota systems
Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
Find and compare another public water system by name or PWSID. Search systems

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

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

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

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