Water Well Drilling Agreements

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 Water well drilling agreement example | Appendix 1. water well casing specifications | Water well drilling report | Water well drilling agreement form
This module outlines a checklist of items that you and your licensed water well contractor should discuss and agree to before starting any drilling. A clear understanding between both parties is crucial so there are no misunderstandings or false expectations. Disagreements can arise between licensed water well contractors and well owners after the well is drilled because they simply did not take the time to thoroughly discuss all aspects of the drilling operation ahead of time.

Water wells are far more than a deep wet holes in the ground. They are an important and significant investment for any household or farm. Well owners should take the time to ensure they understand what they are purchasing. Money spent on high quality well design and construction materials is money well invested. A low cost well may not deliver the quality,
quantity or reliability you need.

A Water Well Drilling Agreement covers the topics you should discuss with your licensed water well contractor before any work begins. A blank copy of an example agreement is included at the back of this module and in the pocket on the back cover. Many contractors have their own version of a Water Well Drilling Agreement.

Water Well Drilling Agreement Example

This agreement is designed to prevent misunderstandings between the well owner and licensed water well contractor. It benefits both parties and can establish costs for materials
and services.

See Water Well Drilling Agreement Example

Appendix 1. Water Well Casing Specifications

All well casing material must meet or exceed the specifications set for that material and purpose by the Canadian Standards Association or the American Society for Testing and Materials.

Non-plastic well casing - required thickness

Type of Well Casing
Minimum Casing Thickness
Metal well casing0.188 in. (4.78 mm)
Metal liner casing0.156 in. (3.96 mm)
Cement like casing
* for 24 in. (60.96 cm)
casing or less
*for casings larger than 24 in.
* 2.5 in. (6.35 cm)
*2.5 in. plus 1 in. for every additional foot of well diameter
Corrugated and galvanized steel casing16 gauge

Plastic well casing - required thickness for ABS or PVC

Outside Pipe
in. (mm)
Casing Schedule
(SCH) number
Minimum Wall
in. (mm)
4.5 (114.3)
4.95 (125.7)
SDR 21
SCH 40
0.214 (5.43)
0.260 (6.60)
5 nominal (127.0)
5.56 (141.2)
SCH 80
0.397 (10.1)
6 (152.4)
6.625 (168.3)
Well Casing
SCH 40
SCH 80
0.390 (9.9)
0.432 (11.0)
0.280 (7.1)
8.625 (219.7)
8.625 (219.7)
SCH 40
SCH 80
0.322 (8.2)
0.5 (12.7)
10.75 (273.1)
10.75 (273.1)
SCH 40
SCH 80
0.365 (9.2)
0.593 (15.1)


Other Documents in the Series

  Water Wells That Last
Understanding Groundwater
Planning Your Water System
Design and Construction of Water Wells
Water Well Drilling Agreements - Current Document
Monitoring and Maintenance of your Water Well
Shock Chlorination
Troubleshooting Water Well Problems
Protecting Your Well From Contamination
Plugging Abandoned Wells
Groundwater Management
Contacts for More Information about Water Wells
Other Resources
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For more information about the content of this document, contact Murray Tenove.
This document is maintained by Deb Sutton.
This information published to the web on September 19, 2006.
Last Reviewed/Revised on April 23, 2018.