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Why Darke County?

High Quality Water

The Dayton Region offers a sustainable source for the world's most important resource-WATER.

  • 1.5 trillion gallons of groundwater
  • 2,000+ gallons of water per minute routinely achieved
  • EPA award-winning source water protection programs
  • Groundwater that maintains a constant 56F° and provides a valuable source of geothermal energy

With aquifers yielding more than 13,900 gallons per minute, the Dayton Region, located in southwest Ohio, excels in the ability to obtain high quality water and in the quantity needed. And with award winning source water protection programs, the Region has a large, replenishing and pure aquifer system that is less vulnerable to water shortages than most of the U.S. In fact, the Region has so much excess capacity that it is able to tap the aquifer for geothermal systems to cost-effectively heat and cool buildings.

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During times when many areas across the nation are struggling with drought conditions, the Dayton Region is drought-free and welcomes water- intensive business and industry to share its abundant water resources.

Table 1. Water Use in Darke County, Ohio.1
Well No. 1 2 3 WQ Std2
Well Depth (feet) 230 72 170  
Capacity (gpm) 300 200 80  
Depth to Bedrock (feet) 95 ne3 38  
Water-Bearing Formation4 LS SG LS  
Chemical Constituents5        
Total Dissolved Solids 567 537 587 500
Hardness (as CaCO3) 450 440 394 none6
Iron 5.8 1.2 2.4 0.3
Chloride 7 7 7 250
pH 7.2 7.6 7.7 none
  1. Data on these wells taken from Underground Water Resources map H-6 and 7; general location of each well is shown on Figure 1.
  2. USEPA Secondary Water Quality Standard.
  3. ne = well constructed in this formation did not encounter bedrock.
  4. SG-Sand and Gravel; LS-Limestone.
  5. Units are parts-per-million, ppm; Comments as per Interpreting Your Water Test Report (1988);

    Total Dissolved Solids: Concentrations above 500 ppm may cause adverse taste and deteriorate domestic plumbing and appliances. Use of water containing 500 ppm is common.

    Hardness: Primary concerns are that more soap is required for effective cleaning, a film may form on fixtures, fabrics may yellow, and scales may form in boilers, water heaters, and cooking utensils.

    Iron and Manganese: Iron concentrations greater than 0.3 ppm and manganese concentrations greater than 0.03 may cause brown or black stains on laundry, plumbing fixtures and sinks. Metallic taste may be present which may affect the taste of beverages made from the water.

    Chloride: High concentrations may result in an objectionable, salty taste to water and the corrosion of plumbing in the hot water system.

    pH: Is expressed on a scale of 1 (acidic) to 14 (basic). A pH of 7.0 is neutral.

  6. No USEPA Secondary Standard.

Source: http://ohioline.osu.edu/aex-fact/0490_19.html