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Importer Guide

Lab Result Above the EU MRL: Will the Lot Be Rejected?

Last updated: 18 October 2026 · By the FoodGate Audit inspection team (ISO 17020 accredited) · Get a free quote in 24h →

Not automatically. EU control laboratories report every pesticide result with a default expanded measurement uncertainty of 50%, and a sample is judged non-compliant only when the result minus that uncertainty still exceeds the maximum residue limit (MRL). In practice a result has to be above roughly twice the MRL before an official laboratory calls it an exceedance: 0.015 mg/kg against a 0.01 mg/kg limit is compliant, 0.025 mg/kg is not. The rule is set out in the EU guidance document SANTE/11312/2021 v2026, which laboratories have applied since 1 January 2026.

Key Takeaways

Each point below is a decision a quality manager takes between the laboratory report and the loading slot.

PointDetails
Subtract half, then compareThe border reads x minus U against the MRL, with U set by default at 50% of the result. Do the same sum before deciding on a lot.
Use the limit in force on arrivalLimits move. Compare against the MRL that applies when the lot enters the EU, not the one that applied when it was sampled in Egypt.
Match reporting limits to the MRLSome EU limits sit below 0.01 mg/kg. A laboratory that reports "below 0.01" cannot clear a lot against a limit of 0.001.
Treat the zone between one and two MRLs as a holdA result there is compliant on paper and fragile at the border, which tests its own sample of the same lot.

Table of Contents

The rule an EU control laboratory applies

SANTE/11312/2021 v2026 is the analytical quality control guidance prepared by the EU reference laboratories for pesticide residues with national experts, and it replaced version v2 for work from 1 January 2026. Two paragraphs decide the fate of a borderline result. Paragraph E12 sets a default expanded measurement uncertainty of 50%, calculated from EU proficiency tests and covering the variation between European laboratories. Paragraph E14 says the result is reported as x ± U and that the MRL is taken as exceeded only if x minus U is above the MRL, which gives at least 97.5% confidence that the true value is over the limit.

Appendix D of the guidance shows how sharp the line is once results are rounded to two significant figures:

Reported result (mg/kg)Result minus uncertaintyMRL (mg/kg)Verdict in the guidance
0.078 ± 0.0390.0390.1Compliant, result below the MRL
0.19 ± 0.100.090.1Compliant despite a result above the MRL
0.21 ± 0.110.100.1Compliant, lower bound equals the MRL
0.22 ± 0.110.110.1Non-compliant

Source: SANTE/11312/2021 v2026, Table D1, read on 18 October 2026.

The 50% is a ceiling the laboratory has to earn. E12 allows its use only when the laboratory has shown that its own expanded uncertainty is below 50%, and E13 asks for a higher figure to be considered when its repeatability or proficiency test scores are poor. When a residue is defined as a sum, as for bifenazate and its diazene, Appendix C applies the same default to the sum when each component carries 50%.

What the Egyptian alert record shows

The EU dataset of RASFF notifications on Egyptian produce holds 541 records from 28 November 2019 to 22 September 2026. Eleven of them print a pesticide residue concentration in their subject line, and five print it with its uncertainty. In all five the uncertainty is half the result, rounded as Appendix D prescribes. Two of the eleven are set aside below: one reports 2-chloroethanol, which the EU counts inside the ethylene oxide residue, and one names chlorpyrifos in its title and propargite in its hazard field. The nine that remain can be checked against the limit that applied on the day.

DateProductSubstanceResult (mg/kg)EU MRL that dayResult minus 50%Notification type
17 Apr 2026Navel orangesLambda-cyhalothrin0.74 ± 0.370.20.37Information for attention
14 Mar 2025Frozen strawberriesBifenazate0.023 ± 0.0120.01*0.011Information for follow-up
17 Jul 2024Frozen strawberriesOxamyl0.01 ± 0.0050.001*0.005Border rejection
23 Apr 2024OrangesDimethoate0.034 ± 0.0170.01*0.017Border rejection
22 Dec 2023StrawberriesOxamyl0.074 ± 0.0370.01*0.037Information for attention
26 Jun 2023OrangesChlorpropham0.0240.01*0.012Border rejection
21 Apr 2023OrangesChlorfenapyr0.0320.01*0.016Border rejection
1 Sep 2021Not named in subjectChlorpyrifos0.0620.01 (printed)0.031Information for attention
15 Mar 2021OrangesChlorpyrifos-ethyl0.040.01*0.02Alert

Sources: RASFF Window records behind our open RASFF dataset; MRLs read on 18 October 2026 in the EU Pesticides Database API with their regulation and date of application. An asterisk marks a limit set at the limit of determination. Where no uncertainty is printed, the default 50% is applied.

Every one of the nine clears the E14 test. The closest call is the bifenazate lot: 0.011 left after the deduction, against a limit of 0.01, a margin of a thousandth of a milligram. The oxamyl rejection of July 2024 looks wrong at first reading, a result of 0.01 on a fruit whose limit had always been 0.01. It is not. Regulation (EU) 2024/331 had cut the oxamyl limit on strawberries to 0.001 mg/kg from 11 May 2024, just over nine weeks earlier, so the lower bound of 0.005 was five times the limit in force. Twenty-eight of the 30 oxamyl notifications in the record are dated on or after that cut.

Limits below 0.01 and the reporting-limit trap

Limits below the usual floor change the arithmetic. Most limits for substances not approved in the EU sit at 0.01 mg/kg, but the EU database shows several lower ones on Egyptian products in October 2026: oxamyl at 0.001 mg/kg on strawberries, potatoes, peppers and table grapes and 0.002 on oranges and tomatoes, fipronil at 0.005 on every Egyptian product checked, and carbofuran and emamectin at 0.002 on several. On these, a laboratory whose reporting limit is 0.01 writes "less than 0.01", and that line clears nothing. An oxamyl residue of 0.005 on strawberries is invisible to such a method and still leaves 0.0025 after the deduction, two and a half times the limit.

The date matters as much as the value. Each amending regulation says which goods keep the old limit, typically those produced in or imported into the EU before its date of application, so a lot that arrives after that date is judged on the new one. The oxamyl case shows how a limit can drop while lots of the same season are still on their way. Our EU MRL Checker carries the limits for the main Egyptian crops; the regulation and date of application of any change are in the EU database.

Pro Tip: before releasing a lot, run the border's sum on the laboratory report: take the reported value, subtract half of it, and compare what is left with the limit the EU database lists for the week the container will arrive. If what remains sits close to the limit, as the bifenazate lot did at 0.011 against 0.01, treat the lot as unresolved, not as passed.

Why "below twice the limit" is not a loading rule

The 50% describes how far two competent laboratories can differ on the same homogenised sample. It says nothing about how far two samples drawn from the same lot can differ. The official sample at the border is drawn by the authority from the consignment as it arrives, and residues are not spread evenly through a load: one grower's bins, one spray date or one pallet can carry most of what a composite sample picks up. A pre-shipment result at 1.6 times the MRL is compliant under E14 and gives no assurance that the next sample of the same lot will not read 2.4 times.

Two further limits sit outside the guidance. A buyer's own specification, or the specification of the retailer it supplies, may be stricter than the legal MRL, and the 50% deduction plays no part in a contractual limit unless the contract says so. And a border rejection is only one outcome: five of the nine notifications above were information or alert notifications rather than rejections, and they stay in the record against the product, the origin and the operators named, where the next control reads them. The consequences of each route are set out in what happens after an EU rejection.

The useful reading of the rule is therefore narrower than "anything under twice the limit ships". A result below the MRL is a pass. A result above twice the MRL is a failure whichever laboratory repeats it. Between the two lies a band where the paperwork is clean and the risk is real, and the decision there belongs to the buyer, made on a fresh sample rather than on the first report.

Where inspection fits

The arithmetic above depends on a sample that represents the lot. That is the part an inspection body controls. Under a pre-shipment inspection, FoodGate Audit's inspector takes the laboratory sample in person, from cartons chosen at random in the load at the packhouse in Egypt, and dispatches it to the laboratory the buyer has chosen, so that the result describes the goods that will be shipped. A reference sample drawn at the same time is what makes a re-test on a borderline result possible without arguing over where it came from.

FoodGate Audit is an inspection body accredited to ISO/IEC 17020 and independent of the trade: it does not buy or sell produce. It is not a laboratory and does not certify. The laboratory report, with its x ± U and its reporting limits, is a separate document from the inspection report, and both belong in the lot file.

What a hold costs when the border disagrees with the origin result, including demurrage, storage and destruction, can be estimated with the rejection cost calculator. Laboratory scope, reporting limits and the release rule for a season can be agreed in writing beforehand through our contact page.

Shipping from Egypt this season? Put independent eyes at the packhouse.

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FAQ

Frequently asked questions

Why is the uncertainty on my residue report exactly half the result?

Because 50% is the harmonised default that EU guidance SANTE/11312/2021 v2026 asks laboratories to report alongside an MRL exceedance. It was derived from EU proficiency tests and reflects the spread between European laboratories, not the precision of one instrument. The rounded figure may look slightly above half, as in 0.023 ± 0.012, because the uncertainty is rounded on its own.

Can a laboratory apply an uncertainty lower than 50%?

Only in specific and justified cases, and only toward the authorities. Footnote 9 of the guidance allows a laboratory to report its own lower uncertainty for risk management evaluations when intra- and inter-laboratory evidence supports it. For enforcement decisions, the guidance says the authorities can use the 50% default.

Does the deduction also apply to substances that are banned in the EU?

Yes. A substance that is not approved in the EU still has an MRL, usually at the limit of determination, and the same x minus U test applies to it. What changes the outcome is the level of that limit: against 0.001 mg/kg, as for oxamyl on strawberries since May 2024, even a result of 0.01 fails after the deduction.

Is a residue report without an uncertainty figure still usable?

It can be read, but it falls short of the guidance. Paragraph E14 asks for every result to be reported as x ± U, and for the harmonised 50% to be given whenever an MRL is exceeded. Faced with a bare figure, apply the 50% default yourself, and ask the laboratory to state its uncertainty and reporting limit for each substance on the next report.

Does the 50% rule apply to a buyer's contractual limit?

Not unless the contract says it does. A specification that caps residues at a share of the MRL is a commercial term, and the guidance only governs official controls. Writing into the purchase order whether the contractual limit is read on x or on x minus U avoids an argument after the result arrives.

Sources

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