The standards we hold every page to — accuracy, expertise, independence, and honesty about what our tools can and cannot do.
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Accuracy and fact-checking
Accuracy is the whole promise of this site. Every calculator is built on a recognised standard, every figure is verified against the live tool, and every factual claim in our content is checked against a primary source. The technical detail of how we do this is on our methodology page. If we cannot make a tool correct and defensible, we do not publish it.
Authorship and expertise
Every calculator and guide is written and reviewed by a credentialed water professional, and each page carries that person's name. We assign topics by expertise, and the named specialist is accountable for the method and the numbers on their pages:
- John Mac, PE — a Texas-licensed Professional Engineer — leads the engineering and hydraulics tools: water science, flow, pressure, pumps, and drainage.
- Sarah Bennett, MS — an environmental scientist — leads water quality, everyday usage, and cost: treatment, usage, and cost.
You can read more about our team on our about page.
Sourcing and citations
We build from primary sources and list them on each page so you can check our work, linking to the original standard, dataset, or research wherever possible. We never invent statistics, ratings, testimonials, or reviews, and we do not present another site's figures as our own.
Independence
Our results and recommendations are never for sale. No advertiser, sponsor, or commercial partner can change a calculation, a recommendation, or a rating. Any advertising or commercial arrangements are kept strictly separate from our calculators and editorial content, and never influence the numbers a tool produces or the guidance we give.
Honesty about limits
Our calculators are planning aids, not professional advice. For structural, regulatory, medical, or safety-critical decisions they are a starting point — not a substitute for site-specific testing or a licensed professional. We deliberately keep questions that turn on a health-or-safety judgement, such as whether water is safe to drink, in clearly-marked guides rather than a calculator result.
Corrections
When we get something wrong, we fix it promptly and note the update date on the page. If you find an error, please contact us — reader corrections are among the most valuable messages we receive, and we act on them quickly.
Updates and maintenance
Water standards, reference data, and utility rates change over time. We revisit our pages to keep them current, and every page shows its published and last-updated dates so you can judge how fresh it is.