GroundRosterMichael W. RiehlLicensed
| Name | Michael W. Riehl |
| Company | A-1 Septic Services, Inc. |
| License number | 00543 |
| License type | Registered On-Site Wastewater (Septic) Professional |
| License status | Current — MD State Board of On-Site Wastewater Professionals |
| License expires | 2026-12-31 |
| Location | Pasadena, Maryland 21122 |
| Phone | (410) 437-5115 |
Request a quote from Michael W. Riehl
How to verify this license
We publish this listing exactly as it appears in Maryland's official licensing records; we do not vouch for the business itself. Before hiring, look up license #00543 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: MD State Board of On-Site Wastewater Professionals - registered individuals, last checked 2026-08-17. Verify at the official source.
Are you Michael W. Riehl? Claim this listing to set your business name and add your website, service area, hours, and photos. It's free.