{"query":{"parameter":"strontium","place":"US-PA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-PA","US"],"parameter_keys":["cas:7440-24-6","name:strontium-89","cas:10098-97-2","name:strontium 90","name:strontium-90"],"names_matched":[["strontium","cas:7440-24-6"],["strontium 89","name:strontium-89"],["strontium 89 dissolved","name:strontium-89"],["strontium 90","cas:10098-97-2"],["strontium 90","name:strontium 90"],["strontium 90","name:strontium-90"],["strontium 90 dissolved","name:strontium-90"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":6,"offset":0,"returned":6,"next_offset":null,"rows":[{"id":"a8de5f60b4133d8a","parameter":"Total strontium","value":"10 mg/L","value_num":10,"unit":"mg/L","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"regional","route":"direct","parameter_key":"cas:7440-24-6","place":["US-PA"],"conditions":["route is direct","treated wastewater from fracturing, production, field exploration, drilling or completion of natural gas wells, discharged from a centralized waste treatment facility (§95.10(b)(3)(i))"],"cite":{"instrument":"us_pa_95_10","title":"25 Pa. Code §95.10 — Treatment requirements for new and expanding mass loadings of Total Dissolved Solids (TDS)","issuer":"Commonwealth of Pennsylvania, Environmental Quality Board (Department of Environmental Protection)","edition":"Pennsylvania Code as served 2026-10-09: §95.10 adopted August 20, 2010, effective August 21, 2010, 40 Pa.B. 4835","source_url":"https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/025/chapter95/s95.10.html","source_sha256":"3efe28fe5fdf25026065dc5c8eda59ff926fd8783ef959b26b5366dd5ef24c20","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"25 Pa. Code §95.10(b)(3)","page":null,"quote":"(vi) The discharge may not contain more than 10 mg/L of total strontium as a monthly average."}},{"id":"96759b3f41dc3271","parameter":"STRONTIUM","value":"4000","value_num":4000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-24-6","place":["US-PA"],"conditions":[],"cite":{"instrument":"us_pa_wqs","title":"25 Pa. 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