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Jarrod Gravison
Editor & Data Lead, Gravison Group
Jarrod Gravison is the editor and data lead at HardWaterHQ. He built and maintains the site's water-hardness and water-quality dataset, covering 685 US and Canadian cities.
What he does here
Jarrod is responsible for how HardWaterHQ's data is gathered, verified, and published. That means:
- Compiling hardness and contaminant figures from primary municipal water-quality reports (Consumer Confidence Reports / Annual Water Quality Reports).
- Cross-checking against USGS hardness data, the EWG Tap Water Database, and — for Canadian cities — provincial datasets and Health Canada guidelines.
- Enforcing the site's sourcing standard: no number ships without a citable primary source, and a wrong number is treated as worse than no number.
- Writing the editorial and methodology that explain what the numbers mean in plain English.
How the data is held to a standard
HardWaterHQ publishes utility-reported hardness wherever a primary source exists, and marks any value that is computed (from calcium and magnesium) rather than directly measured. U.S. contaminant figures are compared against EPA Maximum Contaminant Levels; Canadian figures against Health Canada Maximum Acceptable Concentrations. The full sourcing approach is documented on the about & methodology page and the sources page.
About Gravison Group
HardWaterHQ is one of the research and reference properties operated by Gravison Group. Gravison Group builds data-driven reference sites that answer practical questions with sourced, verifiable information rather than opinion.