How utilities, pipes, treatment and testing work – and what boiling can and cannot fix.
A strip and a laboratory test can both be sold as "water testing" and answer completely different questions. Which tests you can…
Tablets are light, cheap and slow. What their contact times actually buy you, why iodine is off the table in pregnancy and…
Eight drops per gallon at 6 percent bleach, six drops at 8.25 percent, and 30 minutes of contact time. The EPA figures,…
If floodwater reached the wellhead, the well is presumed contaminated. The CDC sequence — inspect, purge, shock chlorinate, wait 7 to 10…
The tank in your basement and the filters under your sink do not make tap water safe. What each device actually does,…
Utilities issue the notice, states enforce the rules, and the EPA sets the deadlines. Here is who is responsible for what, how…
Most advisories are not caused by found contamination — they are precautionary responses to pressure loss, treatment problems or a positive sample.…
Most advisories last 24 to 48 hours. Some last a week. What determines the length, why clear water means nothing, and the…
A pitcher filter makes water taste better — it does not make contaminated water safe. Here is what NSF/ANSI 42, 53, 58…
Boiling kills germs, but it does nothing for lead, nitrates, pesticides or fuel — and it can make them more concentrated. Here…