Registered onsite wastewater professionals in Washington County, Missouri
1 person on Missouri’s roster of individually registered onsite wastewater professionals gives Washington County as its address. A registered professional is someone who holds a Missouri onsite wastewater registration personally.
| Name | Licence | City | Expires |
|---|---|---|---|
| Jeffrey Cantwell | Basic InstallerNo. 39132 | St Louis | May 31, 2027 |
What “Registered onsite wastewater professional” means in Missouri
Being on this roster means Missouri DHSS has licensed this person for holds a Missouri onsite wastewater registration personally. It is not a rating, a review, or a statement about price, insurance or workmanship.
Registrations carry an expiration date, shown on every listing. The state republishes the dataset as registrations change.
Before you hire, confirm the licence with Missouri DHSS, or the state's own published registration data. How to verify →
Registered onsite wastewater professionals in neighbouring counties
Records as published August 26, 2026. Report a correction.