Comprehensive Lake Microbiology Test

Overview

Most water tests look for a handful of bacteria. This one surveys the biological community. It reports two kinds of information at once: aggregate indicators — total bacteria, total coliform, total fungi, and heterotrophic plate count — that measure how much biological activity is present overall, and organism-level identifications across 151 of the most commonly encountered microorganisms in lake systems. The aggregate numbers answer "is something changing?" The organism list answers "what is causing it?" Used together, they work like a smoke alarm followed by a fire investigation.

What problem does this solve for our lake?

Chemistry tells you the conditions. Biology tells you what those conditions have produced. A lake's microbial community responds to nutrient loading, warming, and contamination faster than most chemical measurements do, which makes biological screening an early-warning tool rather than a confirmation tool. The screen covers ten groups, each answering a different question: • Diatoms — silica-shelled algae whose community composition is one of the most sensitive indicators in limnology. Shifts in which diatoms dominate signal nutrient loading, acidification, warming, or changes in mixing, often before chemistry does. • Harmful and nuisance algae — genera associated with blooms, taste and odor problems, shading of native plants, and in some cases toxin production. • Zooplankton and microfauna — the grazers that eat algae. Their presence and abundance tell you whether your lake's food web is capable of controlling algal growth on its own. • Pathogenic and opportunistic bacteria — including E. coli, Enterococcus, Legionella, Pseudomonas, and Klebsiella. These point toward fecal contamination, sewage intrusion, or failing septic systems, and they carry direct swimmer and pet risk. • Environmental and biofilm-forming bacteria — iron and sulfur bacteria that indicate low-oxygen conditions and internal nutrient cycling, and that foul intakes, pipes, and equipment. • Protozoa and intestinal parasites — strong indicators of human or animal waste reaching the water. • Fungi, yeasts, and molds — associated with decaying organic matter and shoreline degradation. • Dermatophytes and skin-associated fungi — relevant to beaches, camps, and heavy-contact swimming areas. • Particulates and pollen — seasonal inputs that affect clarity and contribute organic nutrient load. • Aggregate indicators — total bacteria, total coliform, total fungi, and heterotrophic plate count, which together give you the overall biological load without naming individual organisms. This is a screening tool. It is designed to tell you where to look next, not to produce a regulatory determination.

What's included?

• A complete lake microbiology test kit shipped directly to you
• All materials required for clean, contamination-free sample collection
• Step-by-step collection and preservation instructions
• Prepaid 2-day return shipping to our accredited partner laboratory
• Full chain of custody and professional lab handling
• Results loaded automatically into your lake's account
• Note on methodology: unlike the chemistry panels in the Toolbox, this biological screen does not run an EPA-approved method. It is a screening tool, and results are not suitable for regulatory or compliance use. For a compliance-grade bacteria result, order the E. Coli & Coliform Enumeration Test, which runs an EPA-approved method.

What's not included

• Sample collection. You collect the sample; we supply everything you need to do it correctly.
• Boat, dock, or shoreline access to your sampling site
• Depth-profile sampling. This is a single grab sample unless you order multiple kits.
• Ice or a cooler for shipping, which you supply
• Treatment, remediation, or applicator services
• A written management plan. The Boathouse can help you interpret results and decide next steps.
• Quantified counts for the 151 organisms. Organism-level results are presence/absence; only the four aggregate indicators are reported as counts in CFU/100 mL.
• Regulatory compliance determinations. For a compliance-grade bacteria result, order the E. Coli and Coliform Enumeration Test.
• Cyanotoxin measurement
• Species-level identification beyond the 151 organisms on the panel

Requirements

• A sample collected in the sterile container provided, without touching the inside of the container or cap
• Same-day shipment after collection, kept cold
• A representative open-water site, or a specific site of concern such as a swimming beach or a suspected septic seep — the two answer different questions
• A Plus, Lake Admin, or PRO subscription to have results loaded into your Lake Pulse account
• Questions about site selection, timing, or which test fits your lake? Contact the Lake Pulse Boathouse before you order.