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It's not clear to me where this data comes from - do spots that are unmarked have none, or are they unmeasured?
by radlad 3y ago
It's not clear to me where this data comes from - do spots that are unmarked have none, or are they unmeasured?
- bobthepanda 3y agoThe data says it comes from public water systems. The EPA requires testing and reporting of water supplies for lots of things. That being said, if you run your own private well, you’re not subject to this.