Kentucky Division of Water
Kentucky environmental lab certification, the Division of Water programs.
How the Kentucky Division of Water certifies drinking water and wastewater labs, how the two programs differ, how out-of-state labs qualify, and the calibration rules in the state manual.
At a glance
How environmental lab certification works in Kentucky.
Kentucky is not a NELAP state. The Division of Water runs two certification programs under its own regulations, one for drinking water and one for wastewater, and neither regulation refers to NELAP or TNI.
State program (non-NELAP)
- Agency
- Kentucky Laboratory Certification Program (KLCP), administered by the Division of Water in the Department for Environmental Protection, Energy and Environment Cabinet. KLCP includes the drinking water program (KDWLCP) and the wastewater program (KWLCP).
- Who needs it
- Labs must be certified by KLCP before analyzing water samples for compliance purposes. Wastewater data for activities subject to 33 U.S.C. 1342 must come from a certified wastewater laboratory.
- Drinking water
- 401 KAR 8:040. Certification is by method analyte pair and is renewed annually, and the Division of Water enforces the EPA Manual for the Certification of Laboratories Analyzing Drinking Water, 5th Edition.
- Wastewater
- 401 KAR 5:320 and the Kentucky Wastewater Laboratory Certification Manual. Certification is by analysis category and method-analyte pairing. The current application form lists one year periods for general labs and two year periods for field-only labs.
- NELAP status
- Not a NELAP accreditation body as of October 2026. Neither 401 KAR 8:040 nor 401 KAR 5:320 mentions NELAP or TNI.
- Out-of-state labs, drinking water
- The cabinet recognizes a lab outside Kentucky on proof of certification by EPA or a qualifying state. The program page describes this as reciprocity with an equivalent certifying authority. Any on-site inspection is at the lab’s cost.
- Out-of-state labs, wastewater
- 401 KAR 5:320 refers to labs seeking equivalency of certification but does not set out the terms. If the cabinet audits a lab located outside Kentucky, the lab bears the reasonable cost of the audit.
The accreditation cycle
The wastewater certification cycle.
The steps below summarize 401 KAR 5:320 for wastewater labs. Drinking water labs are certified annually under 401 KAR 8:040, and the Division of Water performs on-site audits of in-state drinking water labs at least once every three years.
-
Certify by category and method
Certify each analysis category and each method-analyte pairing, as a general or field-only laboratory, with a written Quality Assurance Plan.
-
Proficiency testing
A proficiency test study sample at least annually by the primary analyst or technician. After a failure, a second sample is due within 90 days of notice.
-
On-site audits
The lab must allow a cabinet auditor to conduct, and must participate in, an on-site audit during normal business hours.
-
Renewal by November 15
401 KAR 5:320 sets two year periods, but the current application form lists one year periods for general labs and two year periods for field-only labs. Applications and fees are due by November 15.
Initial calibration
What auditors check in your initial calibrations.
Kentucky does not adopt TNI. For wastewater, the calibration expectations are in the Kentucky Wastewater Laboratory Certification Manual and the 40 CFR 136 methods. For drinking water, they come from the approved methods and the EPA certification manual.
A range that brackets what you report
The lowest standard should sit at or below your reporting limit and the highest at or above the top concentration you report. Results outside the calibrated range need to be qualified.
Error at the low end, not r² alone
A correlation coefficient of 0.999 can still hide a low standard that back-calculates 30 percent off. Auditors look at relative error, especially at the lowest levels.
Records that rebuild the curve
Raw responses, the model and weighting used, any excluded points with the reason, and the verification that followed. An auditor should be able to reconstruct every initial calibration from the record.
Calibration written into the QAP
The Kentucky wastewater manual requires calibration and continuing calibration verification procedures to be described in the QAP or SOPs, sets a minimum of five standards for a quadratic calibration, and requires results below the low calibration standard to be reported as less than (<) the minimum reporting limit.
Source: Kentucky Wastewater Laboratory Certification Manual, Chapter III, 7.4
The wastewater manual also requires a reporting limit standard with each calibration curve and at least quarterly for all methods, and the Division of Water posts IDC, ODC and RLS worksheets on its program pages. Check the current versions there.
Self-check
Are your initial calibrations ready for a Kentucky assessment?
Tick what your lab could show an auditor today. Nothing you select is saved or sent anywhere.
6Checks to work through
Select each item your lab could show an auditor today.
A self-assessment to help you prepare, not a compliance determination.
Kentucky specifics
One division, two programs, two cycles.
Both Kentucky programs sit in the Division of Water, but they run on different rules and schedules. Drinking water certification under 401 KAR 8:040 is annual and follows the EPA drinking water certification manual. Wastewater certification under 401 KAR 5:320 follows Kentucky’s own wastewater manual, with one year periods for general labs and two year periods for field-only labs on the current application form.
Neither program adopts TNI, so there is no TNI module behind the audit. For wastewater, the state manual is specific: calibration procedures belong in the QAP or SOPs, quadratic curves need at least five standards, results below the low standard are reported as less than the minimum reporting limit, and second source standards are routinely used to validate the primary calibration.
Since 2019, certified wastewater labs have been required to use the revised EPA Method Detection Limit procedure. As of October 2026, the legislature’s history lines for both 401 KAR 8:040 and 401 KAR 5:320 are marked Crt to Am, with amendment filing deadlines in 2027, so the rules may change.
How WLTR helps
Calibration evidence ready for a Kentucky audit.
WLTR independently reviews the calibration your instrument software produced. Your analyst still makes the final call. What changes is that the evidence is complete, consistent across analysts, and ready before the auditor asks for it.
- Each analyte reviewed one at a time in the instrument software.
- The model and weighting are whatever the batch was processed with.
- r² is the number most people look at, even though it does not measure error at the low end.
- QA signs off without an independent check on the curve.
- Every analyte and every candidate model side by side in the Calibration Intelligence dashboard.
- Diagnostics run automatically and the best fit curve is identified, with the reasons recorded.
- Relative error at every level, including the lowest standard, shown on one screen.
- A traceable record your QA manager can review, sign and hand to a Division of Water auditor.
See how your own ICAL data looks when every analyte and model is laid out for review.
Questions
Kentucky accreditation FAQs
Is Kentucky a NELAP state?
No. The Kentucky Division of Water is not on TNI’s list of NELAP accreditation bodies as of October 2026, and its drinking water and wastewater regulations do not refer to NELAP or TNI.
Who certifies drinking water labs in Kentucky?
The Division of Water, Department for Environmental Protection, Energy and Environment Cabinet, under 401 KAR 8:040. Certification is annual, by method analyte pair, and the division enforces the 5th Edition EPA Manual for the Certification of Laboratories Analyzing Drinking Water.
Who certifies wastewater labs in Kentucky?
The same division, through the Kentucky Wastewater Laboratory Certification Program under 401 KAR 5:320. Data for activities subject to 33 U.S.C. 1342 must come from a certified wastewater laboratory.
Can an out-of-state lab be certified in Kentucky?
Yes. For drinking water, the cabinet recognizes a lab outside Kentucky on proof of certification by EPA or a qualifying state, and any on-site inspection is at the lab’s cost. For wastewater, an out-of-state lab audited by the cabinet bears the reasonable cost of the audit.
What does Kentucky require for calibration curves?
The Kentucky Wastewater Laboratory Certification Manual requires calibration procedures to be described in the QAP or SOPs, at least five standards for a quadratic calibration, and results below the low calibration standard to be reported as less than the minimum reporting limit.
Sources
Primary sources for this page.
- KY Division of Water, Laboratory Certification (opens in a new tab)
- KY Division of Water, Drinking Water Lab Certification Program (opens in a new tab)
- KY Division of Water, Wastewater Lab Certification Program (opens in a new tab)
- Kentucky Wastewater Laboratory Certification Manual (opens in a new tab)
- 401 KAR 8:040, laboratory certification (drinking water) (opens in a new tab)
- 401 KAR 5:320, Wastewater Laboratory Certification Program (opens in a new tab)
- KY DOW statement on enforcement of the EPA drinking water manual (opens in a new tab)
- TNI, NELAP accreditation bodies (opens in a new tab)
This page summarizes public program information to help labs prepare. Requirements change, and the agency’s current rules and guidance always take precedence. WLTR is not affiliated with or endorsed by the Kentucky Energy and Environment Cabinet. Spot something out of date? Tell us at admin@wltr.tech.
Before your next assessment
See your Kentucky ICALs the way an auditor will.
Bring a recent initial calibration. We will walk you through every analyte and candidate model in the Calibration Intelligence dashboard, the best fit, and the record your QA manager would sign.
Request a demoHow the methodology works
Running environmental methods? See how WLTR works for environmental testing labs and water and wastewater utility labs.