| 1. Requester | Organization: Sample Industries Co. / Address: 45 Sample-ro, Sample-si, Gyeonggi-do |
|---|---|
| 2. Test Item/Material/Sample Description | Drinking water (tap water) sample · Quantity: 1 · Received: colorless, transparent, no abnormality |
| 3. Test Period | 2026-07-20 ~ 2026-07-24 |
| 4. Test Location | In-house laboratory (Sample Testing Institute Water Analysis Building) |
| 5. Test Method | Standard Methods for Drinking Water Quality (Ministry of Environment Notice) · Related KS standards |
| Test Item | Result | Unit | Standard | Measurement Uncertainty (~95% confidence level, k=2) | Test Method | Decision |
|---|---|---|---|---|---|---|
| pH | 7.2 | - | 5.8 ~ 8.5 | ± 0.1 (k=2) | Glass electrode method | Conform |
| Turbidity | 0.15 | NTU | 0.5 or less | ± 0.02 (k=2) | Turbidimetric method | Conform |
| Residual Chlorine | 0.42 | mg/L | 4.0 or less | ± 0.03 (k=2) | DPD colorimetric method | Conform |
| Heterotrophic Plate Count | 3 | CFU/mL | 100 or less | - | Plate culture method | Conform |
| Total Coliform | Not detected | /100mL | Not detected | - | Membrane filtration method | Conform |
These test results apply only to the sample and sample name provided by the requester.
* Any test result marked below indicates it is outside the laboratory's accreditation scope. (No such item in this sample)
The conformity decisions below were made in accordance with the stated decision rule, taking measurement uncertainty into account.
| Test Item | Standard | Measured Value | Conformity | Decision Rule |
|---|---|---|---|---|
| Residual Chlorine | ≤ 4.0 mg/L | 0.42 ± 0.03 (k=2) | Conform | Guard band (w=1×U, k=2) |
| Author | John Doe (Test Operator) (signed) | Technical Manager | Jane Smith (signed) |
|---|
1. This report presents results for the sample tested and may not be reproduced in part without the laboratory's written approval.
2. This report is issued for a test field accredited by the Korea Laboratory Accreditation Scheme (KOLAS) under the Framework Act on National Standards.