Skip to main content
10,000+ reports checkedFind the right filter →
PUBLIC WATER SYSTEM REPORT

Is COE-LK S/OLD FORT THOMPSON Water Safe to Drink in 2026?

South Dakota · PWSID SD4680124 · Surface water

Population served
25
Cities served
—
State / jurisdiction
South Dakota (SD)
PWSID
SD4680124
C
TAP WATER GRADE
Concerning
Model score 63/88 from violations, PFAS profile, and monitoring signals — not a laboratory test of your faucet.
1 violation record(s) in the latest EPA SDWA quarterly snapshot

Water operator? Publish your official 2027 CCR here — residents already find this page. Claim free →

CONTAMINANTS — EPA UCMR5 MONITORING

No UCMR5 PFAS detects on file for this PWS in our bundled national dataset — the system may be smaller than UCMR5 thresholds, had non-detects, or results are not yet linked to this ID. Your retailer Annual Water Quality Report lists other regulated contaminants (chlorine, DBPs, nitrates, etc.).

VIOLATIONS HISTORY (FEDERAL SNAPSHOT)

EPA’s national SDWA quarterly files associate 1 violation-related record with this system in the same reporting quarter as the utility snapshot used on WaterCheckup. This is not a complete historical docket — see ECHO and SDWIS for full compliance context.

Get alerts if this system's EPA data changes:
WHAT TO DO ABOUT IT

Based on COE-LK S/OLD FORT THOMPSON's monitoring and violation profile, here are vetted filtration options — same picks framework as our city reports.

TOP PICKS FOR COE-LK S/OLD FORT THOMPSON
⚠ EPA violations / contaminants in monitoring data
#1
Waterdrop G3P800 RO
EDITORS PICK
Waterdrop  ·  ~$849
Tankless 800 GPD, removes 99%+ PFAS & lead, 10-stage filtration. Smart faucet TDS display.
WHY THIS FOR COE-LK S/OLD FORT THOMPSON · Chosen for COE-LK S/OLD FORT THOMPSON because EPA’s SDWA snapshot shows active violation records. RO addresses a wide range of regulated contaminants, not just chlorine taste.
#2
Aquasana SmartFlow RO
MOST CERTIFIED
Aquasana  ·  ~$449
WQA Gold Seal + NSF 42/53/58/401. Most certifications of any under-sink RO. Removes 90+ contaminants.
#3
AquaTru Under-Sink RO
EASIEST FILTER CHANGE
AquaTru  ·  ~$375
NSF 42/53/58 certified. Quick-change filters, no tools. Compact tankless design, 4-stage filtration.
Not sure which filter is right for you? Take the 3-question quiz →
See all utilities in South Dakota →
STAY INFORMED
Get water quality alerts for COE-LK S/OLD FORT THOMPSON

We'll notify you when new PFAS data, EPA violations, or contamination alerts affect COE-LK S/OLD FORT THOMPSON (PWS SD4680124). One email, no spam, unsubscribe any time.

Water operator for COE-LK S/OLD FORT THOMPSON? Claim this listing →
Check your ZIP code

PWS-wide data may differ from the system serving your home. Enter your ZIP on the homepage for a tailored EPA report.

Fix My Water — Free →