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Wyoming has significant private well usage, particularly given the state's rural character and vast open spaces. The geology varies from the Rocky Mountains to the High Plains, creating different groundwater conditions across the state.
Wyoming does not have a statewide mandate requiring private well water testing at property sale. The state takes a recommendation-based approach, with guidance from the Wyoming Department of Environmental Quality (DEQ) and local resources.
Known contaminants of concern include naturally occurring uranium in some areas and high mineral content typical of the arid West. Testing is essential to know what's in your specific well.
Wyoming does not have a statewide law requiring private well water testing for property sales. Testing is recommended but voluntary for existing private domestic wells.
For new well construction, testing may be required depending on local regulations. Requirements vary by county. Check with your local authority for specific requirements when drilling a new well.
Wyoming DEQ recommends regular testing for all private well owners. Annual testing for bacteria is recommended, with additional testing based on your location and well characteristics.
Real estate transactions often include testing. Mortgage lenders frequently require water quality documentation. Many buyers request testing during due diligence.
The baseline testing recommended everywhere applies in Wyoming: total coliform bacteria and E. coli for sanitary integrity, plus nitrates. Annual testing for bacteria is recommended.
Uranium occurs naturally in some Wyoming groundwater formations. It's odorless and tasteless, so testing is the only way to detect it. If you're in an area with known uranium occurrence, testing is important.
Wyoming's arid climate and geology often result in high mineral content-hardness, sulfate, total dissolved solids, and sometimes high fluoride or selenium. While not always health hazards, these affect water quality and usability.
Consider testing for: lead (especially with older plumbing), uranium (some areas), arsenic, and any contaminants relevant to your specific location.
Every year
At least once, repeat every 3-5 years
Based on location and circumstances
Well water testing costs in Wyoming depend on what you're testing for. Basic bacteria and nitrate tests are generally affordable. Adding uranium, comprehensive panels, or specialty tests increases the cost.
Wyoming's rural character and low population density mean testing logistics require planning. Certified labs serve Wyoming, but sample transport may take longer than in more populated states.
Turnaround time follows typical patterns once samples reach the lab: bacteria results within a few days, chemical tests within 5-10 business days. Plan for additional time for sample collection and shipping.
For real estate transactions, start testing early in the process. Allow adequate time for logistics, analysis, and any follow-up if issues are discovered.
Wyoming well owners can choose from certified laboratories and mail-in test kit providers. For accurate, defensible results, use labs certified for drinking water analysis.
Given Wyoming's size and rural character, mail-in test kits may be particularly practical. Ensure the provider offers appropriate containers and shipping for your location.
Local resources like county extension offices may provide guidance on testing. The Wyoming State Veterinary Laboratory has offered water testing services in some cases.
Wyoming DEQ provides resources for well owners. Using certified labs ensures your results are reliable.
Quick answers to common questions about testing well water in Wyoming, from requirements to regional concerns.