Maintain the water-system map
Preserve sources, treatment, storage, plumbing, backflow and cross-connection context, outlets, recirculation, drains, food-contact and sanitation uses and change history.
SOURCE · SYSTEM · USE POINT · METHOD · RESPONSE
Harvest and Postharvest
Water Evidence
A laboratory result or municipal bill is not a complete produce-water record. Assurance links the exact water source, storage and distribution system to use points, produce and food-contact activities, time, treatment or supplier evidence, sampling and instruments, recirculation or single-pass state, temperature and physical operating context where applicable, corrective actions and authorized review.
5CHAPTERS4VISUAL BLOCKS3GRAPH LINKS3SOURCES
OBSERVE / SELECTED CONCEPTHarvest and Postharvest Agricultural-Water Evidence AssuranceStart with the role, then move through the editorial sequence.
HOW TO READ THIS PAGE
Visual explanationA diagram or operating scene makes the relationship visible.
Structured modelA flow, comparison, capability set, or boundary map organizes the idea.
Guided explanationOriginal prose connects the concept to its operating context.
01 / Overview
Measure water where
the operation uses it.
FDA's current agricultural-water FAQ distinguishes agricultural-water uses and explains that harvest and postharvest water management is tailored to the commodity and practice. Penn State packhouse guidance connects water and food-contact surfaces to broader packing sanitation.
Water evidence remains source-, system-, use-point-, product-, process-, method-, sampling-, treatment-, time-, jurisdiction- and operating-state-specific. A result from one point or date cannot represent every outlet, recirculated system, production period or corrective state.
02 / Evidence loop
Map, qualify, monitor,
respond and verify.
01MAP / 01Define source-to-use architectureSource and supplier, wells or intakes, treatment where present, storage, distribution, cross-connections, hoses, outlets, dump or flume and wash systems, sanitation uses, product contact, food-contact surfaces and responsible owner
02QUALIFY / 02Establish current authority and methodOperation coverage, applicable requirements and plan, source or supplier evidence, sample plan, laboratory and method, instruments, units, locations, timing, custody, limits only from qualified authority and review dates
03MONITOR / 03Join result to operating stateExact use point, product and lot, single-pass or recirculated context, time, flow and replenishment, treatment and controls, temperature or other process context where applicable, equipment state, cleaning, deviations and gaps
04RESPOND / 04Use authorized correction and verificationStop or hold authority, affected scope, alternate water, system inspection, qualified corrective action, resampling or other verification, product review, communication, evidence and re-release decision
03 / Evidence layers
Source, sample, process
and product remain distinct.
LayerCan supportCannot establish alone
Supplier or source recordWater-source evidence for a periodCondition at every use point
Laboratory sampleMethod-specific result for a sampled place and timeContinuous process control
Process observationOperating context at a use pointMicrobiological status
Product or lot recordExposure and custody scopeSafety or disposition without authority
04 / Practice
Keep the water result
attached to product exposure.
Protect sampling provenance
Record purpose, point, method, container, collector, time, custody, laboratory, analysis, units, qualifiers, corrections and representativeness limits.
Capture operating context
Link results to product and lot, use point, flow state, recirculation, replenishment, treatment, equipment, time, maintenance, cleaning and deviations.
Bound corrective decisions
Identify affected water system, time window, product and lots, holds, alternate supply, authorized correction, verification, communication and release owner.
05 / Boundaries
This briefing does not set
water-quality criteria.
No water criterion, sampling frequency, treatment, sanitizer, temperature, contact time, corrective action or product disposition is provided.Use current FDA and local authority, commodity-specific plans, qualified laboratories and water or food-safety professionals.
Never use untreated or questionable water because a remote dashboard appears normal.Physical system state, current supplier or sample evidence and authorized controls remain necessary.
A compliant source can be compromised downstream.Storage, plumbing, hoses, cross-connections, recirculation, equipment, drains, maintenance and use-point practices can change exposure.
06 / Connections
See the system around this concept.
Follow incoming and outgoing relationship records to understand what supplies, informs, enables, coordinates with, or extends this technology in the published knowledge graph.
Relationship radar / published edges3 records / 3 neighboring systems
Incoming01records point toward this concept
observe roleHarvest and Postharvest Agricultural-Water Evidence AssuranceSelected technology
Outgoing02records point from this concept
03connections visible
decide / Post-harvest systemsOn-Farm Produce Food-Safety Plan Assurance ↗defines governed water uses and evidence roles for
The operation-specific plan identifies which water systems and produce or food-contact activities need owned monitoring, response and review.
observe / Post-harvest systemsPackinghouse Sanitation Verification Assurance ↗adds source, use-point and operating context to
Sanitation review benefits from knowing which water system, outlet and operating state supported cleaning and food-contact activities.
decide / Post-harvest systemsProduce Hold, Release and Disposition Assurance ↗supplies bounded use-point and exposure evidence to
Water evidence can inform affected-system and product review but does not itself determine a hold, release or other disposition.
1CONNECTED ROUTE3–3STEP POSITIONS8ROUTE SOURCE LINKS
Operating practice
Follow produce safety evidence from plan to recall readiness
Move through operation-specific plan governance, harvest and postharvest water evidence, packinghouse sanitation, lot traceability, controlled hold and disposition, and a safe recall-readiness exercise without supplying a food-safety prescription or recall instruction.
- 01 / PLANUnderstand operation-specific plan assuranceTechnology→
- 02 / AUDIT PLANAudit the plan against the operationField guide→
- 03 / MAP WATERUnderstand water evidence at the use pointTechnology→
- 04 / AUDIT WATERAudit one source-to-use chainField guide→
- 05 / VERIFY SANITATIONUnderstand packinghouse sanitation verificationTechnology→
- 06 / AUDIT GATEAudit one pre-operational sanitation gateField guide→
- 07 / TRACEUnderstand food-lot traceabilityTechnology→
- 08 / CONTROL PRODUCTAudit a hold and disposition decisionField guide→
- 09 / TEST TRACERun a bounded lot-trace exerciseField guide→
- 10 / EXERCISE RESPONSERun a safe recall-readiness exerciseField guide
CURRENT POSITION03
03 / MAP WATER
Open the complete route ↗Understand water evidence at the use point
Join source and distribution identity to produce contact, sampling, operating state, deviations and qualified response.
07 / Evidence
Primary sources.
This original briefing uses FDA current agricultural-water and Produce Safety resources plus Penn State packhouse context. It provides no water criterion, process setting, treatment, sampling program or product release decision.
01
Frequently Asked Questions: Agricultural Water Requirements under the FSMA Produce Safety RuleU.S. Food and Drug Administration · Accessed 2026-08-11
02
FSMA Final Rule on Produce SafetyU.S. Food and Drug Administration · Accessed 2026-08-11
03
Reducing Food Safety Risks in the PackhousePenn State Extension · Accessed 2026-08-09