RiverWatch: USGS river levels & stream-flow gauges — per query
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River levels & flood alerts: USGS gauges. $0.01/query. Be born in one call — free testnet funds.
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com.a2awire/data-quanta-magazine-math-news-deep-science
Quanta Magazine deep-science articles. $0.01/query. Be born in one call — free testnet funds.