Circular Letters
- Circular Letter 2024-29 SSDS Revised Exception Application Forms
- Circular Letter 2024-16 Secondary Safety Device or Lid, Risers & Safety Devices
- Circular Letter- 2022-80 Revised 1/10/2023 Technical Standards Updates
- Circular Letter 2022-31 Family Campgrounds Portable Sewage Tanks
- Circular Letter 2017-26 Water Treatment Wastewater
- Circular Letter 2017-22 Temporary Health Care Structures
- Circular Letter 2017-17 Subsurface Sewage Disposal System Jurisdiction
- Circular Letter 2015-29 Sewage Tank Covers, Risers & Safety Devices
- Circular Letter 2012-42 Central System Exceptions
- Circular Letter 2012-39 Wet Season Monitoring
- Circular Letter 2011-70 Water Supply Well Separation Distance Exceptions
- Circular Letter 2009-66 Installer License Verification
- Circular Letter 2009-62 Plan Review Fees
- Circular Letter 2009-35 Lakes and other Surface Water Sources
- Circular Letter 2009-17 Point of Use Reverse Osmosis
- Circular Letter 2008-67 Well Exception Request
- Circular Letter 2007-60 DSS Design Flow
- Circular Letter 2007-28 Well Exception Notice
- Circular Letter 2007-12 Geothermal Wells
- Circular Letter 2007-11 Geothermal Wells
- Circular Letter 2006-29 Groundwater Monitoring
- Circular Letter 2005-22 Well Exception Requests
- Circular Letter 2005-21 Tank Marking
- Circular Letter 2003-22 Wastewater Management Districts
- Circular Letter 2003-21 Groundwater Monitoring Period
- Circular Letter 2003-20 Permit Issuance
- Circular Letter 2002-25 On-site Sewage Disposal Updates
- Circular Letter 2002-24 Accessory Structures and Non-flow Generating Additions
- Circular Letter 2002-03 Updates On-site Sewage Disposal
- Circular Letter 2001-17 Training Schedule, Regional Map and Filter Letter
- Circular Letter 2001-10 Licensed Day Care Facilities
- Circular Letter 2001-07 Sewage updates
- Circular Letter 2000-14 Tank Compliance and Pipe-Filter Approval
- Circular Letter 2000-01 Sewage updates
- Circular Letter 1999-19 Section 19-13-b100a Updates
- Circular Letter 1998-13 Septic Updates
- Circular Letter 1995-08 MLSS Stacking