Data stories & guides
Rankings, state-vs-state comparisons and plain-English guides — every number computed straight from the same published dataset that powers the rest of WaterMetrics.
2026-07-25
Missouri vs Arkansas: Whose Tap Water Is Cleaner?
Tap Water Quality in Missouri (76.2/100) vs Arkansas (83.7/100) — a 9% gap between neighbors, explained with July 2026 data.
2026-07-23
Every State With Genuinely Hard Tap Water (200 PPM+)
14 states sit at or over 200 PPM for water hardness as of July 2026. The full list, ranked.
2026-07-21
The Best Whole-Home Water Purification Setups for Every Budget (2026)
From a $50 test to an $8,000 whole-house reverse-osmosis system — what each tier actually fixes, with real installed prices.
2026-07-19
Minnesota vs South Dakota: Whose Tap Water Is Cleaner?
Tap Water Quality in Minnesota (78.8/100) vs South Dakota (96.5/100) — a 20% gap between neighbors, explained with July 2026 data.
2026-07-17
Wisconsin vs Minnesota: Whose Tap Water Is Harder?
Water Hardness in Wisconsin (140 PPM) vs Minnesota (175 PPM) — a 22% gap between neighbors, explained with July 2026 data.
2026-07-15
7 Warning Signs Your Tap Water May Be Contaminated
What cloudy water, metallic tastes and rotten-egg smells actually mean — and why the most dangerous contaminants have no signs at all.
2026-07-13
Washington vs Idaho: Whose Tap Water Is Harder?
Water Hardness in Washington (70 PPM) vs Idaho (100 PPM) — a 35% gap between neighbors, explained with July 2026 data.
2026-07-11
Virginia vs West Virginia: Whose Tap Water Is Harder?
Water Hardness in Virginia (120 PPM) vs West Virginia (130 PPM) — a 8% gap between neighbors, explained with July 2026 data.
2026-07-09
Is My Tap Water Healthy? How to Actually Find Out
Three checks — your state's data, your utility's report, and a $50 home test — tell you more than any rumor or smell ever will.
2026-07-07
The 10 States With the Best Tap Water (2026)
The ten best water states for tap water quality, ranked from published July 2026 data — with full state-by-state breakdowns.
2026-07-05
The 10 States With the Worst Tap Water (2026)
The ten worst states for tap water quality, ranked from published July 2026 data — with full state-by-state breakdowns.
2026-07-03
The 10 States With the Softest Tap Water (2026)
The ten softest states for water hardness, ranked from published July 2026 data — with full state-by-state breakdowns.
2026-07-01
The 10 States With the Hardest Tap Water (2026)
The ten most expensive states for water hardness, ranked from published July 2026 data — with full state-by-state breakdowns.