fix: export daily minimum depth for NGWMN transducer water levels#721
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The legacy NMA_WaterLevelsContinuous_Pressure_Daily values are the shallowest reading of each day (verified min matches 1460/1460 days of raw SO-0252 data; the mean matches none), so exporting the daily mean shifted every published transducer value deeper by ~0.01-0.33 ft. Select depth_to_water_bgs_min from transducer_daily_data instead to keep the NGWMN record consistent with the historically harvested data. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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What changed
make_waterlevels_responsenow selectsdepth_to_water_bgs_minfromtransducer_daily_datainstead of the daily mean. Tests updated to assert the min statistic.Why
Compared production vs staging for
/ngwmn/waterlevels/SO-0252: identical dates (1475 records each), but every transducer-day depth on staging was deeper by ~0.01–0.33 ft. The legacyNMA_WaterLevelsContinuous_Pressure_Dailyvalues that production serves are the shallowest reading of each day — verified against rawWaterLevelsContinuous_Pressuredata: daily min matches 1460/1460 days, daily mean matches 0. Exporting the min keeps the NGWMN published record consistent with what the portal has harvested for years.No migration needed — the materialized view already carries
depth_to_water_bgs_min.🤖 Generated with Claude Code