Total Hardness- Drinking Water

Laboratory Fee Schedule
Group: Inorganic
Procedure #:  EZZ0015A

Synonym(s):  Hardness by Calculations 
Requisition Form G-22
Test Description This procedure describes the determination of total hardness by calculations in drinking water and non-portable water samples.
Pre-Approval Needed N/A
Supplemental Information Required N/A
Supplemental Form(s) N/A
Performed on Specimens from (sources) Environmental
Sample/Specimen Type for Testing Drinking water
Minimum Volume/Size Required 1 Liter
Storage/Preservation Prior to Shipping Store in hard or soft plastic, or glass; 1 quart (1 L)
Transport Medium N/A
Specimen Labeling
  • Label each bottle with a waterproof marker.
  • Sample identification must match information on submission form.\
Shipping and Specimen Handling Requirements Ship according to Dangerous Good Regulations, IATA, and/or CFR 49.
Method Total Hardness, SM, 19th edition 2340B
Turn-around Time N/A
Interferences/Limitations Some known interferences are as follows:
  • Spectral interference
  • Background emission and stray light
  • Spectral overlaps
  • Physical, chemical and memory interferences
Common Causes for Rejection
  • Insufficient quantity
  • Unacceptable specimen type or source
  • Improper shipping conditions
  • Expired media or collection container
  • Discrepancies between specimen label and submission form
  • Incomplete or missing submission form
Additional Information N/A