Calvert County, Maryland · septic · last verified 2026-09-07
01644
Cotton's Septic
Cotton's Septic
File
- Street
- 11223 Country Road
- City / town
- Dunkirk
- County
- Calvert
- State
- MD
- ZIP
- 20754
- Phone
- 410-257-7606
- Website
- —
- License number
- 01644
- Board
- Maryland Department of the Environment / MD State Board of On-Site Wastewater Professionals (OSDS Registered Individuals); Calvert County Health Department Division of Environmental Health (county septic installer license required — county installer/scavenger street roster not published online)
- Status
- Named with a Calvert County street on the MDE On-Site Wastewater Professionals / OSDS Registered Individuals list (List Updated September 2, 2026; pdfinfo CreationDate/ModDate Wed Sep 2 2026 UTC). Registration number printed on that roster. Calvert County also requires a county septic installer license (Chapter 110) and a separate scavenger / septage-hauler permit for pumping; neither county number series is printed on a fetchable public street roster this pass — county scavenger/installer lists are available upon request only. Seeded rows claim septic_install from the printed MDE registration; county scavenger (pumping) numbers are not invented.
- Expires
- 2027-07-31
- License contact
- Samuel R. Longfellow
- Last verified
- 2026-09-07
- COI on file
- no
Services claimed from opened sources
- septic install (septic_install)
Sources opened
- https://mde.maryland.gov/programs/water/BayRestorationFund/OnsiteDisposalSystems/Documents/Onsite%20Systems/OSDS-Registered-Individuals.pdf
- https://calverthealth.org/community/environmentalhealthservices/septic.htm
- https://calverthealth.org/community/environmentalhealthservices/PDF/glinosds.pdf
- https://calverthealth.org/community/environmentalhealthservices/PDF/prctstgu.pdf
- https://www.calvertcountymd.gov/DocumentCenter/View/16088
File notes
MDE OSDS list Updated 9/2/2026: registration 01644, Longfellow Samuel R, 11223 Country Road, Dunkirk MD 20754, [email protected], 410-257-7606, Cotton's Septic; expires 7/31/2027. Census: Calvert County ZIP 20754.