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.
2026-09-03
Montana vs North Dakota: Whose Tap Water Is Cleaner?
Tap Water Quality in Montana (82.4/100) vs North Dakota (84.0/100) — a 2% gap between neighbors, explained with July 2026 data.
2026-09-01
Oklahoma vs Missouri: Whose Tap Water Is Cleaner?
Tap Water Quality in Oklahoma (72.6/100) vs Missouri (76.2/100) — a 5% gap between neighbors, explained with July 2026 data.
2026-08-30
Kentucky vs West Virginia: Whose Tap Water Is Cleaner?
Tap Water Quality in Kentucky (80.5/100) vs West Virginia (82.3/100) — a 2% gap between neighbors, explained with July 2026 data.
2026-08-28
Idaho vs Washington: Whose Tap Water Is Cleaner?
Tap Water Quality in Idaho (81.7/100) vs Washington (85.6/100) — a 5% gap between neighbors, explained with July 2026 data.
2026-08-26
Oregon vs California: Whose Tap Water Is Harder?
Water Hardness in Oregon (70 PPM) vs California (200 PPM) — a 96% gap between neighbors, explained with July 2026 data.
2026-08-24
Ohio vs Michigan: Whose Tap Water Is Cleaner?
Tap Water Quality in Ohio (81.0/100) vs Michigan (83.1/100) — a 3% gap between neighbors, explained with July 2026 data.
2026-08-22
Michigan vs Wisconsin: Whose Tap Water Is Harder?
Water Hardness in Michigan (140 PPM) vs Wisconsin (140 PPM) — a 0% gap between neighbors, explained with July 2026 data.
2026-08-20
Lead in Tap Water: When to Worry and What to Test
Lead almost never comes from the treatment plant — it comes from the pipes in and under your own home. Here's the checklist.
2026-08-18
Pennsylvania vs Maryland: Whose Tap Water Is Cleaner?
Tap Water Quality in Pennsylvania (75.9/100) vs Maryland (85.4/100) — a 12% gap between neighbors, explained with July 2026 data.
2026-08-16
Alabama vs Georgia: Whose Tap Water Is Cleaner?
Tap Water Quality in Alabama (84.1/100) vs Georgia (84.8/100) — a 1% gap between neighbors, explained with July 2026 data.
2026-08-14
PFAS in Tap Water: What the New Federal Limits Mean for You
"Forever chemicals" now have enforceable drinking-water limits, but utility deadlines stretch to the end of the decade. What to do meanwhile.
2026-08-12
Louisiana vs Texas: Whose Tap Water Is Harder?
Water Hardness in Louisiana (100 PPM) vs Texas (268 PPM) — a 91% gap between neighbors, explained with July 2026 data.
2026-08-10
Illinois vs Iowa: Whose Tap Water Is Cleaner?
Tap Water Quality in Illinois (76.8/100) vs Iowa (81.7/100) — a 6% gap between neighbors, explained with July 2026 data.
2026-08-08
Do You Actually Need a Water Softener? An Honest Answer
Softener marketing wants everyone to buy one. The USGS hardness scale — and your state's number — say otherwise.
2026-08-06
Arkansas vs Tennessee: Whose Tap Water Is Harder?
Water Hardness in Arkansas (38 PPM) vs Tennessee (130 PPM) — a 110% gap between neighbors, explained with July 2026 data.
2026-08-04
Maine vs Vermont: Whose Tap Water Is Harder?
Water Hardness in Maine (60 PPM) vs Vermont (70 PPM) — a 15% gap between neighbors, explained with July 2026 data.
2026-08-02
How to Read Your Water Utility's Annual Report (Without a Chemistry Degree)
The CCR is the single most useful document about your tap water — once you know which three columns matter.
2026-07-31
Tap Water Quality Across the Great Plains: Every State Ranked
How 5 Great Plains states compare on tap water quality, from South Dakota to Oklahoma, with July 2026 figures.
2026-07-29
North Carolina vs Virginia: Whose Tap Water Is Harder?
Water Hardness in North Carolina (120 PPM) vs Virginia (120 PPM) — a 0% gap between neighbors, explained with July 2026 data.
2026-07-27
On a Private Well? Here's Your Testing Schedule
No federal rule monitors the 43 million Americans on private wells. The testing calendar that fills that gap.
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.