Indiana Administrative Code
Title 327 - WATER POLLUTION CONTROL DIVISION
Article 8 - PUBLIC WATER SUPPLY
Rule 3.3 - Public Water System Quantity Requirement Standards
Section 3.3-2 - Calculation of public water system quantity requirement standards for average and peak demand conditions
Current through September 18, 2024
Authority: IC 13-14-8; IC 13-14-9; IC 13-15-1-2; IC 13-15-2-1; IC 13-18-3-1; IC 13-18-4-1
Affected: IC 13-11-2; IC 13-13-5-1; IC 13-18-2
Sec. 2.
(a) The calculated average and peak flowrate values required for a water main extension to a public water system shall be equal to the average and peak daily consumer demands of the proposed additional service connections calculated as follows:
ADCD = (General Avg) × PRSC
PDCD = (ADCD × PF) + FF
Where: ADCD = Average daily consumer demand in gallons per residential service connection per day.
PDCD = Peak daily consumer demand in gallons per residential service connection per day.
General Avg = General average daily consumer demand value of five hundred (500) gallons per residential service connection per day. PRSC = Proposed number of residential service connections.
PF = Peak daily consumer demand factor of two and one-half (2.5).
FF = Fire flow demand value equal to the fire protection flowrate provided by the public water system or zero (0) if the public water system is not providing fire protection.
ADCD = (Max Average) × PRSC
PDCD = (ADCD × PF) + FF
Where: ADCD = Average daily consumer demand in gallons per residential service connection per day.
PDCD = Peak daily consumer demand in gallons per residential service connection per day.
Max Average = Maximum average daily consumer demand in gallons per service connection as calculated by:
Max Average = (ADCD10) ÷ (SC10)
Where: ADCD10 = The highest average daily demand as reported on the MROs over the previous ten (10) year period.
SC10 = The number of service connections at ADCD10. PRSC = Proposed number of residential service connections. PF = Peak daily demand factor as calculated by the following:
PF = MDD10 ÷ 10YADD
Where: MDD10 = The maximum single day demand as reported on the MROs over the previous ten (10) year period.
10YADD = The ten (10) year average daily demand as calculated from the previous ten (10) year period.
FF = Fire flow demand value equal to the fire protection flowrate provided by the public water system or zero (0) if the public water system is not providing fire protection.
ADCD = DCF × PSC
PDCD = (ADCD × PF) + FF
Where: ADCD = Average daily consumer demand in gallons per service connection per day.
PDCD = Peak daily consumer demand in gallons per service connection per day.
DCF = Demand calculation factors as contained in Table 2-1 in subsection (b).
PSC = Proposed number of service connections.
PF = Peak daily consumer demand factor of two and one-half (2.5).
FF = Fire flow demand value equal to the fire protection flowrate provided by the public water system or zero (0) if the public water system is not providing fire protection.
Table 2-1 Demand Calculation Factors (DCF)
| Service Connection Description | DCF (gallons per day) |
| Airport | 3 per passenger plus 20 per employee |
| Assembly Hall | 3 per seat |
| Bar (without Food Service) | 10 per seat |
| Beauty Salon | 35 per customer |
| Bowling Alley (with Bar and/or Food) | 125 per lane |
| Bowling Alley (without Food Service) | 75 per lane |
| Bus Station | 3 per passenger |
| Campground Organizational with Flush Toilets | 40 per camper |
| Campground Organizational without Flush Toilets | 20 per camper |
| Campground Recreational with Individual Sewer Connection | 100 per campsite |
| Campground Recreational without Individual Sewer Connection | 50 per campsite |
| Church with Kitchen | 5 per sanctuary seat |
| Church without Kitchen | 3 per sanctuary seat |
| Correctional Facilities | 120 per inmate |
| Day Care Center | 20 per person |
| Dentist | 750 per chair plus 75 per employee |
| Factory with Showers | 35 per employee |
| Factory without Showers | 20 per employee |
| Food Service Operations Cocktail Lounge | 35 per seat |
| Food Service Operations Restaurant, not Open 24 Hours | 35 per seat |
| Food Service Operations Restaurant, Open 24 Hours | 50 per seat |
| Food Service Operations Restaurant, open 24 hours and Located Along an Interstate | 70 per seat |
| Food Service Operations Tavern | 35 per seat |
| Food Service Operations Curb Service (Drive-In) | 50 per car space |
| Hospital, Medical Facility | 200 per bed |
| Hotel | 100 per room |
| Kennel | 20 per animal enclosure |
| Mental Health Facility | 100 per patient |
| Motel | 100 per room |
| Nursing Home | 100 per bed |
| Office Building | 20 per employee |
| Outpatient Surgical Center | 50 per patient |
| Picnic Area | 5 per visitor |
| School Elementary | 15 per pupil |
| School Secondary | 25 per pupil |
| School with Dormitory | 100 per bed |
| Service Station (Gas Station) | 400 per restroom |
| Shopping Center | 0.1 per square foot of floor space, plus |
| 20 per employee | |
| Swimming Pool Bathhouse | 10 per swimmer |
| Theater Drive-In | 5 per car space |
| Theater Inside Building | 5 per seat |
