Circular Letters
- May 1, 2026 Letter to Environmental Labs - Private Well Reporting Portal – Template Review Invitation
- EHDW Circular Letter 2025-08 - Guidance on Private Well Water Test Result Reporting and Disclosure
- Circular Letter 2024-34 - Public Water System and Local Health Department Drought Preparedness
- Circular Letter 2022-60 Changes to Private Well Testing Laws
- Circular Letter 2016-03 Update Guidance on Sodium and Chloride in Well Water
- Circular Letter 2014-27 Well Completion Reports -Revised 061214
- Circular Letter 2010-61 Water Testing of Repaired Wells - Hydrofracking
- Circular Letter 2010-19 Private Well Flooding Concerns
- Circular Letter 2009-35 Lake & Other Surface Water Supply Sources
- Circular Letter 2009-17 Point of Use Reverse Osmosis Wastewater
- Circular Letter 2006-32 Upgrading your Well by Extending the Casing