{ "type": "water", "pwsid": "OH5701315", "name": "Montgomery County Water Services 1", "county": "Montgomery", "population": 150207, "producer": false, "source_class": "groundwater", "label": "Great Miami Buried Valley Aquifer wells (recharged by Great Miami & Mad Rivers)", "bodies": [ "Great Miami River", "Mad River" ], "intakes": [], "wells": null, "aquifer": "Great Miami Buried Valley Aquifer", "notes": "Montgomery County Water Services 1 (SWP) purchases essentially all its water from the City of Dayton, whose own source is a blend of Great Miami/Mad River surface intakes and Great Miami Buried Valley Aquifer wellfields.", "urls": [ "https://www.mcohio.org/DocumentCenter/View/9017/2025-testing-year-Drinking-Water-Quality-Report-", "https://www.mcohio.org/264/Water-Services", "https://www.daytonohio.gov/1163/Buried-Valley-Aquifer" ], "chain": [ "OH5701315", "OH5703512" ], "plants": [ { "n": "Ottawa Water Treatment Plant (City of Dayton)", "a": "1044 Ottawa St, Dayton, OH 45402", "la": 39.7684, "lo": -84.1725, "pt": "plant", "wb": "Great Miami Buried Valley Aquifer (Mad River Wellfield)", "src": "Wells of the Mad River Wellfield beside the Mad River in east Dayton, piped to the Ottawa plant", "cls": "groundwater", "k": "OH5703512#0", "of": "OH5703512" }, { "n": "Miami Water Treatment Plant (City of Dayton)", "a": "3210 Chuck Wagner Ln, Dayton, OH 45414", "la": 39.8079, "lo": -84.1695, "pt": "plant", "wb": "Great Miami Buried Valley Aquifer (Miami Wellfield, North and South)", "src": "Wells of the Miami Wellfield beside the Great Miami River in north Dayton, piped to the Miami plant", "cls": "groundwater", "k": "OH5703512#1", "of": "OH5703512" } ], "facts": { "hist": [ [ "1988", "The Great Miami Buried Valley Aquifer, Dayton's sole water source, was designated a federal Sole Source Aquifer in May 1988." ], [ "2017", "An Ohio EPA source water assessment found the aquifer feeding Dayton's wellfields highly susceptible to contamination." ], [ "2021", "The City of Dayton began litigation with the U.S. Department of Defense over PFAS migrating from Wright-Patterson Air Force Base." ], [ "2023", "Montgomery County's environmental laboratory moved in December into a renovated 10,000 sq ft downtown Dayton building, replacing a 1970s Moraine facility." ], [ "2026", "Dayton sued Wright-Patterson AFB in Cincinnati federal court on Feb 19, seeking more than $300 million for PFAS treatment and cleanup." ] ], "treat": "Buried-valley aquifer wells feed Dayton's Miami and Ottawa plants, where the water is lime-softened, filtered, chlorinated and fluoridated. PFAS-affected Ottawa water is currently handled by blending between the two plants rather than by dedicated treatment.", "press": "not published; no pressure or pressure-zone figures appear in the county water quality report or the utility rate documents", "rate": { "g": 6.95, "n": "2026 water only: $50.96 per 1,000 cf single-family plus a $1.00 well-field charge (=$6.95/1,000 gal), plus $18.95 service and $7.45 capital per quarter on a 5/8-in meter", "m": 39.98 }, "imp": [ [ "PFOS", "8.81", "ppt", "4.0", "2025", "Ottawa plant average, range 5.45-13.67; above the new federal MCL, compliance due 2029" ], [ "PFHxS", "13.53", "ppt", "10", "2025", "Ottawa plant average, range 6.7-23.32; above the new federal MCL" ], [ "PFOA", "2.97", "ppt", "4.0", "2025", "Ottawa plant average, range <2.0-4.5; below the MCL. Miami plant was <2.0" ], [ "TTHM", "44.9", "ppb", "80", "2025", "north system locational running average, range 18.2-57.3; south system 30.1" ], [ "HAA5", "6.2", "ppb", "60", "2025", "north system, range <6-24.6; south system below the reporting limit" ], [ "Nitrate", "1.71", "ppm", "10.0", "2025", "Miami plant highest, range <0.10-1.71; Ottawa plant 1.44" ], [ "Lead (90th pct)", "<5", "ppb", "AL=15", "2025", "no samples over the action level in 32 north or 54 south samples" ], [ "Copper (90th pct)", "0.041-0.056", "ppm", "AL=1.3", "2025", "north 0.0407, south 0.056; no exceedances" ] ], "proj": [ [ "Miami Well Field 36-inch raw water main (Phase A)", 7500000, "", "unknown", "added raw water transmission capacity; funded by a WIIN grant through Ohio EPA. Completion date not stated." ], [ "Rip Rap Well Field improvements", 8000000, "", "unknown", "four new groundwater wells adding 12 MGD of capacity; funded by two Ohio EPA DEFA loans. Completion date not stated." ], [ "Montgomery County Environmental Laboratory relocation", null, "2023", "completed", "10,000 sq ft downtown Dayton lab, ARPA-funded, running ~11,000 samples and 38,000 tests a year" ] ], "plan": [ [ "Ottawa plant PFAS filtration system", 384000000, "", "planned", "Dayton seeks $384M to build it plus $70M for 20 years of upkeep; $14.9M in Ohio EPA emerging-contaminant funding approved in 2022" ] ], "stress": "Dayton's sole source, the Great Miami Buried Valley Aquifer, was rated highly susceptible by Ohio EPA in 2017: thin clay cover, shallow depth, surface-water recharge and known plumes in the wellfield protection area. PFAS from Wright-Patterson's Area A shows in monitoring wells upstream of production wells at hundreds of times the new…", "sew": { "s": "Montgomery County Environmental Services runs the sanitary sewers and two water reclamation facilities, Eastern Regional and Western Regional, and maintains more than 1,400 miles of water mains. The 2026 county sewer volume charge is $53.78 per 1,000 cf plus service and capital charges.", "st": "No separate stormwater utility fee appears in Montgomery County's 2026 schedule of water and sewer rates; stormwater arrangements vary by member community and were not verified this pass." }, "fun": [ "The Great Miami Buried Valley Aquifer holds roughly 1.5 trillion gallons and is the sole drinking water source for about 400,000 people around Dayton.", "It was designated a federal Sole Source Aquifer in May 1988, one of a small number nationwide.", "Montgomery County's environmental lab, opened downtown in December 2023, occupies a renovated former child-care building next to the County Administration Building.", "Monitoring wells upstream of Dayton's production wells have shown PFAS from Wright-Patterson at several hundred times the new federal drinking water limits." ] }, "zips_served": [ { "zip": "45429", "share": 0.9659, "dominant": true }, { "zip": "45459", "share": 0.9221, "dominant": true }, { "zip": "45439", "share": 0.8151, "dominant": true }, { "zip": "45458", "share": 0.8022, "dominant": true }, { "zip": "45440", "share": 0.5633, "dominant": true }, { "zip": "45420", "share": 0.3734, "dominant": false }, { "zip": "45409", "share": 0.3363, "dominant": false }, { "zip": "45419", "share": 0.3123, "dominant": false }, { "zip": "45449", "share": 0.3001, "dominant": false }, { "zip": "45431", "share": 0.2911, "dominant": false }, { "zip": "45404", "share": 0.2246, "dominant": false }, { "zip": "45342", "share": 0.1991, "dominant": false }, { "zip": "45432", "share": 0.1976, "dominant": false }, { "zip": "45414", "share": 0.0422, "dominant": false }, { "zip": "45424", "share": 0.0051, "dominant": false } ], "photo": { "url": "/photos/OH5701315.jpg", "caption": "The Great Miami River at Dayton, which recharges the buried valley aquifer wells serving the region", "credit": "Giorgio Galeotti", "license": "CC BY-SA 4.0" }, "url": "https://crackedbuckeye.com/water/OH5701315/", "api": "https://crackedbuckeye.com/api/water/OH5701315.json", "generated": "2026-09-16", "license": "CC BY 4.0 for the compilation; each source keeps its own terms", "cite": "Cracked Buckeye (Open Shower Co), \"Montgomery County Water Services 1 · OH5701315\", https://crackedbuckeye.com/water/OH5701315/, built 2026-09-16, accessed [date].", "schema": "https://crackedbuckeye.com/api/schema.json" }