{ "type": "water", "pwsid": "OH8301512", "name": "Warren County", "county": "Warren", "population": 81975, "producer": true, "source_class": "groundwater", "label": "Wells in the Little Miami and Great Miami river valley aquifers", "bodies": [ "Little Miami River", "Great Miami River" ], "intakes": [], "wells": 24, "aquifer": "Buried Valley Aquifer System - Little Miami valley (Renneker plant) plus Great Miami valley (Franklin plant)", "notes": "Warren County Water's Socialville plant and related wellfields draw from wells along the Great Miami and Little Miami river valleys (sand-and-gravel buried-valley aquifer); the county's 24 active wells feed several plants pulling from this same regional glacial aquifer system.", "urls": [ "https://data.epa.gov/efservice/WATER_SYSTEM_FACILITY/PWSID/OH8301512/JSON", "https://edocpub.epa.ohio.gov/publicportal/ViewDocument.aspx?docid=2788628", "https://www.shookconstruction.com/projects/warren-county-oh-renneker-ion-exchange-pfas-upgrade" ], "chain": [ "OH8301512" ], "plants": [ { "n": "Richard W. Renneker Water Treatment Plant", "a": "6193 Striker Road, Maineville, OH 45039", "la": 39.3305, "lo": -84.2495, "pt": "plant", "wb": "Little Miami River Buried Valley Aquifer", "src": "17 groundwater wells drawing from the Little Miami River buried valley (sand-and-gravel) aquifer along the river near Maineville, in southern Warren County", "cls": "groundwater", "in": [ { "n": "East and Thompson well fields", "wb": "Little Miami River Buried Valley Aquifer (glacio-alluvial sand and gravel)", "role": "primary", "src": "About 10 wells in Little Miami valley sand and gravel beside the Renneker plant on Striker Road near Kings Mills. (10 wells)", "la": 39.3305, "lo": -84.2495, "pt": "plant", "sh": 29 }, { "n": "Sod Farm and Revis well fields", "wb": "Little Miami River Buried Valley Aquifer (glacio-alluvial sand and gravel)", "role": "primary", "src": "Seven wells in Little Miami sand and gravel near State Route 48 below South Lebanon, upstream of the Renneker plant. (7 wells)", "la": 39.359, "lo": -84.226, "pt": "approximate", "sh": 20 } ] }, { "n": "Pennyroyal Road Water Treatment Plant", "a": "3049 Pennyroyal Road, Franklin, OH 45005", "la": 39.5895, "lo": -84.3565, "pt": "plant", "wb": "Great Miami Buried Valley Aquifer", "src": "Six groundwater wells on the west side of the Great Miami River along Dayton-Oxford Road, near Franklin/Carlisle in northwestern Warren County", "cls": "groundwater" } ], "facts": { "hist": [ [ "1960s", "The Warren County Water & Sewer Department began operating and says it has never permitted lead pipe in its mains or on customer service laterals." ], [ "2022", "Softening started up at both plants after a corrosion control study done with Ohio EPA, and nanofiltration membrane treatment was added." ], [ "January 2023", "Nanofiltration membrane construction was completed, cutting hardness and improving removal of PFAS, pesticides and herbicides." ], [ "July 2024", "Ohio EPA approved merging the Franklin-Clearcreek and Richard Renneker systems into the new Warren County Public Water System." ], [ "April 2025", "The county began building ion exchange PFAS treatment at the Renneker plant, scheduled to finish that November." ] ], "treat": "24 wells in 5 wellfields feed two county plants: Franklin Area (7 wells) and Renneker (4 wellfields). Softening, nanofiltration membranes, pH control with sodium hydroxide and orthophosphate, then fluoride and chlorine; Renneker adds ion exchange for PFAS.", "press": "not published - no psi figure found; the county uses elevated storage such as the 20 Mile elevated tower rather than publishing a system average.", "rate": { "g": 5.7, "n": "2026 water: $34.20 bimonthly minimum covers 0-6,000 gal, then $5.70 per 1,000 gal, plus a $5.00 bimonthly repair/replacement charge. Sewer billed separately.", "m": null }, "imp": [ [ "PFAS (six federally regulated compounds)", "ND", "ppt", "EPA MCLs…", "2024", "Non-detect in treated water in both 2023 and 2024 after the nanofiltration upgrade." ], [ "Perfluoropentanoic acid (PFPeA), UCMR5", "0.0017 avg…", "ppb", "unregulated…", "2024", "Detected at the Franklin-Clearcreek plant; non-detect in the Socialville system." ], [ "PFOA, UCMR5", "ND", "ppb", "unregulated…", "2024", "Non-detect at both Franklin-Clearcreek and Socialville." ], [ "PFOS, UCMR5", "ND", "ppb", "unregulated…", "2024", "Non-detect at both Franklin-Clearcreek and Socialville." ], [ "Lithium, UCMR5", "ND", "ppb", "unregulated…", "2024", "Non-detect at both sampling points; no MCL exists for lithium." ], [ "Nitrate", "below MCL", "ppm", "10", "2024", "Nov. 2024 lab ran nitrite not nitrate; the late retest was below the MCL but drew a monitoring violation." ] ], "proj": [ [ "Nanofiltration membrane treatment at both plants", null, "2023", "completed", "Added in 2022 and completed January 2023 at Renneker and Franklin Area; cuts hardness and removes PFAS, pesticides and herbicides." ], [ "Renneker Water Treatment Plant ion exchange PFAS system", null, "2025", "completed", "Anion exchange added to the existing nanofiltration building; AECOM engineer, Shook Construction builder. No public cost figure found." ], [ "Franklin-Clearcreek / Richard Renneker system merger", null, "2024", "completed", "Ohio EPA approved consolidation into a single Warren County Public Water System in July 2024." ] ], "plan": [ [ "Future capital program", null, "", "unknown", "No Warren County capital improvement plan or Ohio EPA loan-list entry for future water projects was found in the sources reviewed." ] ], "stress": "Ohio EPA classes the Great and Little Miami buried valley aquifers highly susceptible, given contaminant sources in the protection areas. Low PFAS at the Renneker wellfields drove nanofiltration then ion exchange. 15% of customers drink Springboro water, whose aquifer sits under 5 ft of cover.", "sew": { "s": "The Warren County Water & Sewer Department also runs county sanitary sewer. 2026 sewer rates are a $34.32 bimonthly minimum for 0-6,000 gal then $5.72 per 1,000 gal, with a separate Carlisle-area sewer-only rate. Plant names, capacities and any consent decree were not found.", "st": "Not detailed in sources reviewed." }, "fun": [ "Warren County reports no lead, no galvanized-requiring-replacement, and no unknown-material service lines anywhere in its distribution system.", "The system is a patchwork of five sub-systems: Franklin-Clearcreek and Richard Renneker on county wells, Socialville on Cincinnati water, and Pennyroyal and Sharts Road on Springboro water.", "A November 2024 lab mix-up - nitrite tested instead of nitrate - drew an Ohio EPA monitoring violation even though the retest came back below the nitrate limit.", "The 24 county wells pump more than 2 billion gallons a year, and the finished water averages 140 mg/L of hardness, about 8 grains." ] }, "zips_served": [ { "zip": "45034", "share": 1.0, "dominant": true }, { "zip": "45039", "share": 0.9753, "dominant": true }, { "zip": "45065", "share": 0.4321, "dominant": false }, { "zip": "45152", "share": 0.171, "dominant": false }, { "zip": "45140", "share": 0.0701, "dominant": false }, { "zip": "45040", "share": 0.0179, "dominant": false } ], "photo": { "url": "/photos/OH8301512.jpg", "caption": "The Little Miami River, source of the buried valley aquifer serving Warren County wells", "credit": "Minh Nguyen", "license": "CC BY-SA 4.0" }, "url": "https://crackedbuckeye.com/water/OH8301512/", "api": "https://crackedbuckeye.com/api/water/OH8301512.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), \"Warren County · OH8301512\", https://crackedbuckeye.com/water/OH8301512/, built 2026-09-16, accessed [date].", "schema": "https://crackedbuckeye.com/api/schema.json" }