WATER MICROBIOLOGY LABORATORY EVALUATION FORM
State of Illinois
Illinois Department of Public Health
SAMPLE COLLECTION, HANDLING, AND PRESERVATION
1. Minimum of 1 inch air space for mixing sample; if too full, poured into a larger sterile container and mixed
properly (465.370d).
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2. Sample Identification
Identification included sample source, location, time and date of collection, collector's name and
organization (if not the water supply), persons transporting sample (if not the sampler), transportation
condition, sample type and total chlorine residual where applicable (465.370e).
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3. Form completed in indelible ink immediately after collecting sample (465.370e).
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4. Date and time recorded of arrival at laboratory and name of person receiving sample (465.370g).
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5. Each sample assigned a laboratory number; repeat or replacement sample has original sample number
recorded (465.370g2).
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6. For drinking water samples, time between sample collection and placement of analyzed sample in
incubator less than or equal to 30 hours (465.370i).
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7. For water samples tested under the SWTR, time between sample collection and placement of analyzed
sample in incubator shall not exceed eight hours (465.370j).
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NA
8. For water samples tested under the SWTR, samples shall be held at <10C (465.370l).
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NA
9. For water samples tested under the LT2 Rule, time between sample collection and placement of analyzed
samples in incubator shall not exceed 30 hours, unless approved by state for up to 48 hours; samples shall
be held at < 10 C (465.370j) (465.370l).
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10. Potable water samples for HPC delivered within six hours after collection and analyzed within two
hours of receipt (465.370k).
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DATA HANDLING
1. All forms used in the laboratory for both sample reporting and quality control reviewed and approved
by the certification officer (465.410e).
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2. All records initialed or signed by person/s responsible for recording any or all of the data or
performing the tests (465.410a).
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3. Data transferred from a bench sheet, verification of accuracy performed; initialed or signed (465.410d).
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4. Quality control records maintained for five years (465.390a).
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