{
  "type": "water",
  "pwsid": "OH2101412",
  "name": "Del-co Water Company, Inc.",
  "county": "Delaware",
  "population": 150000,
  "producer": true,
  "source_class": "river",
  "label": "Olentangy River, O'Shaughnessy and Alum Creek reservoirs, plus Knox County wells",
  "bodies": [
    "Olentangy River",
    "O'Shaughnessy Reservoir (Scioto River)",
    "Alum Creek Reservoir"
  ],
  "intakes": [
    "Del Co Olentangy River",
    "Olentangy Reservoir",
    "Del Co McNamara Reservoir",
    "Del Co Alum Creek Reservoir",
    "Del Co O'Shaughnessy Reservoir Scioto"
  ],
  "wells": 4,
  "aquifer": "Sand-and-gravel aquifer, Knox County well field",
  "notes": "Del-Co draws from four plants: Olentangy Plant (Olentangy River plus O'Shaughnessy Reservoir on the Scioto River), Ralph E. Scott Plant (Alum Creek Reservoir), Timothy F. McNamara/Old State Plant (Olentangy watershed reservoirs), and Thomas E. Steward Plant (Knox County groundwater wells).",
  "urls": [
    "https://delcowater.org/del-cos-water-sources/",
    "https://delcowater.org/wp-content/uploads/2021/03/2020-Web-Ready-CCR.pdf"
  ],
  "chain": [
    "OH2101412"
  ],
  "plants": [
    {
      "n": "Del-Co Olentangy Water Treatment Plant",
      "a": "6658 Olentangy River Rd, Delaware, OH 43015 (Liberty Township, Delaware County)",
      "la": 40.2012,
      "lo": -83.0563,
      "pt": "plant",
      "wb": "Olentangy River, with on-site upground storage reservoirs and four backup wells",
      "src": "Olentangy River intake at Del-Co's plant on Olentangy River Rd, Liberty Twp, south of the city of Delaware",
      "cls": "river",
      "in": [
        {
          "n": "Olentangy River intake",
          "wb": "Olentangy River",
          "role": "primary",
          "src": "Del-Co's river intake on the Olentangy at the plant on Olentangy River Rd, Liberty Township, south of the city of Delaware",
          "la": 40.2012,
          "lo": -83.0563,
          "pt": "approximate"
        },
        {
          "n": "Olentangy Reservoir #5",
          "wb": "Del-Co upground storage reservoir (Olentangy plant complex)",
          "role": "storage",
          "src": "The largest of Del-Co's man-made upground reservoirs beside the Olentangy plant, holding pumped Olentangy River water; a floating solar array on it supplies about half the plant's electricity",
          "la": 40.2012,
          "lo": -83.0563,
          "pt": "approximate"
        },
        {
          "n": "Olentangy Reservoirs #2, #3 and #4",
          "wb": "Del-Co upground storage reservoirs (Olentangy plant complex)",
          "role": "storage",
          "src": "Three more walled upground reservoirs at the Olentangy plant that bank pumped river water so the plant can keep running when the Olentangy is low or dirty",
          "la": 40.2012,
          "lo": -83.0563,
          "pt": "approximate"
        }
      ]
    },
    {
      "n": "Timothy F. McNamara (Old State) Water Treatment Plant",
      "a": "6645 S Old State Rd, Lewis Center, OH 43035 (Orange Township, Delaware County). Note: Ohio EPA's SDWIS shows this…",
      "la": 40.1848,
      "lo": -82.9913,
      "pt": "plant",
      "wb": "O'Shaughnessy Reservoir on the Scioto River, plus two Del-Co upground reservoirs at the plant",
      "src": "Del-Co's own raw-water intake on O'Shaughnessy Reservoir (Scioto River) near Rathbone, Concord Township",
      "cls": "reservoir",
      "in": [
        {
          "n": "O'Shaughnessy Reservoir intake",
          "wb": "O'Shaughnessy Reservoir on the Scioto River",
          "role": "primary",
          "src": "Del-Co's own intake on O'Shaughnessy Reservoir near Rathbone in Concord Township, about nine miles northwest of Columbus, piped east to the Old State Rd plant",
          "la": 40.1893,
          "lo": -83.1368,
          "pt": "intake"
        },
        {
          "n": "McNamara Reservoir #1",
          "wb": "Del-Co upground storage reservoir (McNamara plant complex)",
          "role": "storage",
          "src": "Upground storage reservoir at the Old State Rd plant holding water pumped from O'Shaughnessy Reservoir; Ohio EPA lists it as a seasonal rather than year-round source",
          "la": 40.1848,
          "lo": -82.9913,
          "pt": "approximate"
        },
        {
          "n": "McNamara Reservoir #2",
          "wb": "Del-Co upground storage reservoir (McNamara plant complex)",
          "role": "storage",
          "src": "Second upground storage reservoir at the Old State Rd plant, banking O'Shaughnessy water alongside McNamara Reservoir #1",
          "la": 40.1848,
          "lo": -82.9913,
          "pt": "approximate"
        }
      ]
    },
    {
      "n": "Ralph E. Scott Water Treatment Plant (Alum Creek)",
      "a": "5213 Lewis Center Rd, Lewis Center, OH 43035 (Africa, Orange Township, Delaware County)",
      "la": 40.1839,
      "lo": -82.9662,
      "pt": "plant",
      "wb": "Alum Creek Reservoir (Alum Creek Lake)",
      "src": "Alum Creek Reservoir intake at the Scott plant, Lewis Center Rd at Africa, Orange Township",
      "cls": "reservoir",
      "in": [
        {
          "n": "Alum Creek Reservoir intake",
          "wb": "Alum Creek Reservoir (Alum Creek Lake)",
          "role": "primary",
          "src": "Del-Co intake on Alum Creek Reservoir - a 3,400-acre lake about 10 miles southeast of Delaware - at the Scott plant on Lewis Center Rd near Africa",
          "la": 40.1839,
          "lo": -82.9662,
          "pt": "approximate"
        }
      ]
    },
    {
      "n": "Thomas E. Steward Water Treatment Plant (Knox County / \"East\" wellfield)",
      "a": "14821 Lucerne Rd, Fredericktown, OH 43019 (Bryant and Lucerne Roads, Wayne Township, Knox County)",
      "la": 40.4552,
      "lo": -82.6253,
      "pt": "plant",
      "wb": "Del-Co Knox County (\"East Knox\") wellfield — sand-and-gravel aquifer",
      "src": "Del-Co's East Knox wellfield at Bryant and Lucerne Rds, Wayne Twp, about 5 miles WSW of Fredericktown",
      "cls": "groundwater",
      "in": [
        {
          "n": "East Knox well field",
          "wb": "Unconfined glacial sand-and-gravel (outwash) aquifer, Wayne Township, Knox County - no significant confining clay layer above it, so Ohio…",
          "role": "primary",
          "src": "4 wells at Bryant and Lucerne Rds, Wayne Twp, Knox County; the Steward plant serves Centerburg, Hilliar Twp and Morrow County (4 wells)",
          "la": 40.4552,
          "lo": -82.6253,
          "pt": "wellfield",
          "wells": [
            "Well 1",
            "Well 2",
            "Well 3",
            "Well 4"
          ]
        }
      ]
    }
  ],
  "facts": {
    "hist": [
      [
        "1969",
        "Del-Co Water Company founded by Ralph Scott, Timothy McNamara and Gerald Solt, financed through the USDA Farmers Home Administration."
      ],
      [
        "1969",
        "Original system: a 1-million-gallon-per-day treatment plant, 200 miles of underground pipe and a single elevated tank."
      ],
      [
        "2001",
        "In October 2001 Ohio EPA approved Del-Co's Wellhead/Drinking Water Source Protection Plan for the Knox County well field."
      ],
      [
        "2025",
        "Effective May 1, 2025 Del-Co scrapped minimum allowances and dropped its conservation tier from 25,000 to 10,000 gallons a month."
      ],
      [
        "2026",
        "Effective May 1, 2026 rates rose again: $5.00, $8.50 and $12.00 per 1,000 gallons across three tiers, base fee up $1 to $15.00."
      ]
    ],
    "treat": "Raw water gets potassium permanganate for zebra mussel control, then ferric chloride and lime in a flash mixer, settling, carbon dioxide stabilization, filtration through fine coal and silicate sand, chlorine, fluoride, and phosphate for corrosion control.",
    "press": "Published: Del-Co says it has historically delivered 40-100 psi, per the Recommended Standards for Water Works. Roughly thirty elevated tanks span eight counties.",
    "rate": {
      "g": 5,
      "n": "Effective May 1, 2026: $5.00/1,000 gal to 4,000; $8.50 to 10,000; $12.00 above; plus a $15.00 monthly base for a 5/8-inch meter. Residential.",
      "m": 47.75
    },
    "imp": [
      [
        "Total trihalomethanes (TTHM)",
        "79.95",
        "ppb",
        "80",
        "2025",
        "Reported at 79.95 against an 80 ppb MCL; no violation. Sample range 24.8-75.3 ppb."
      ],
      [
        "Haloacetic acids (HAA5)",
        "38.78",
        "ppb",
        "60",
        "2025",
        "Disinfection byproduct; range 10.1-45.0 ppb, well under the limit."
      ],
      [
        "Lead (90th percentile)",
        "0.85",
        "ppb",
        "15",
        "2024",
        "0 of 50 sites above the action level; range 0.26-3.15 ppb. Replaces a stale 2018 figure."
      ],
      [
        "Copper (90th percentile)",
        "0.22",
        "ppm",
        "1.3",
        "2024",
        "0 of 50 sites above the action level; range 0.01-0.35 ppm."
      ],
      [
        "Nitrate",
        "1.4",
        "ppm",
        "10",
        "2025",
        "Farm runoff indicator; range 0.21-1.4 ppm, far below the limit."
      ],
      [
        "Atrazine",
        "0.47",
        "ppb",
        "3",
        "2025",
        "Row-crop herbicide runoff; range 0.31-0.76 ppb."
      ],
      [
        "PFAS",
        "ND",
        "ppt",
        "4 (PFOA/PFOS…",
        "2020",
        "Ohio EPA sampled the Olentangy, Alum Creek and Knox plants; no detections."
      ]
    ],
    "proj": [],
    "plan": [],
    "stress": "Del-Co calls its Olentangy River, O'Shaughnessy and Alum Creek sources highly susceptible to contamination from farm runoff, septics and road and rail crossings, and its Knox County wellfield relatively so. Output averages near 13 MGD against 45 MGD design capacity in fast-growing Delaware County.",
    "sew": {
      "s": "Del-Co is a drinking-water-only cooperative and provides no sanitary sewer service. Sewers in its territory are run by local municipalities, townships or county sewer districts; not confirmed per-ZIP in this pass.",
      "st": "Not applicable. Del-Co operates no storm sewers; stormwater is handled by the townships and municipalities across its eight-county service area."
    },
    "fun": [
      "Del-Co is a member-owned nonprofit 501(c)(12) cooperative, not a city department, licensed by Ohio EPA to run four plants and thirty elevated tanks across eight central Ohio counties.",
      "Its six above-ground reservoirs hold more than 2.6 billion gallons of raw water, banked during high stream flows for use when the rivers run low.",
      "Nearly all of it comes from one basin: the Olentangy River, O'Shaughnessy Reservoir and Alum Creek Reservoir all sit in the Upper Scioto watershed, with Knox County wells the lone exception.",
      "Treatment starts with potassium permanganate dosed into the raw water for one specific reason: killing zebra mussels before they reach the plant."
    ]
  },
  "zips_served": [
    {
      "zip": "43021",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43032",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43317",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43320",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43321",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43325",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43334",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43350",
      "share": 1.0,
      "dominant": true
    },
    {
      "zip": "43074",
      "share": 0.9909,
      "dominant": true
    },
    {
      "zip": "43065",
      "share": 0.8414,
      "dominant": true
    },
    {
      "zip": "43035",
      "share": 0.7964,
      "dominant": true
    },
    {
      "zip": "43061",
      "share": 0.7943,
      "dominant": true
    },
    {
      "zip": "43315",
      "share": 0.7313,
      "dominant": true
    },
    {
      "zip": "43314",
      "share": 0.7171,
      "dominant": true
    },
    {
      "zip": "43011",
      "share": 0.715,
      "dominant": true
    },
    {
      "zip": "43082",
      "share": 0.7052,
      "dominant": true
    },
    {
      "zip": "43066",
      "share": 0.6622,
      "dominant": true
    },
    {
      "zip": "43356",
      "share": 0.6529,
      "dominant": true
    },
    {
      "zip": "43003",
      "share": 0.5317,
      "dominant": true
    },
    {
      "zip": "43013",
      "share": 0.0197,
      "dominant": true
    },
    {
      "zip": "43015",
      "share": 0.3715,
      "dominant": false
    },
    {
      "zip": "43338",
      "share": 0.2435,
      "dominant": false
    },
    {
      "zip": "43019",
      "share": 0.1039,
      "dominant": false
    },
    {
      "zip": "44833",
      "share": 0.0861,
      "dominant": false
    },
    {
      "zip": "43017",
      "share": 0.0581,
      "dominant": false
    },
    {
      "zip": "43031",
      "share": 0.0338,
      "dominant": false
    },
    {
      "zip": "43302",
      "share": 0.028,
      "dominant": false
    },
    {
      "zip": "43081",
      "share": 0.0147,
      "dominant": false
    },
    {
      "zip": "43064",
      "share": 0.014,
      "dominant": false
    },
    {
      "zip": "43016",
      "share": 0.0062,
      "dominant": false
    },
    {
      "zip": "43054",
      "share": 0.0036,
      "dominant": false
    },
    {
      "zip": "43040",
      "share": 0.0032,
      "dominant": false
    }
  ],
  "photo": {
    "url": "/photos/OH2101412.jpg",
    "caption": "Delaware Dam on the Olentangy River, part of the Del-Co water source system",
    "credit": "Sixflashphoto",
    "license": "CC BY-SA 4.0"
  },
  "url": "https://crackedbuckeye.com/water/OH2101412/",
  "api": "https://crackedbuckeye.com/api/water/OH2101412.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), \"Del-co Water Company, Inc. · OH2101412\", https://crackedbuckeye.com/water/OH2101412/, built 2026-09-16, accessed [date].",
  "schema": "https://crackedbuckeye.com/api/schema.json"
}