Phylum: Bacillariophyta

Taxon: Asterionella

Authority: Hassall

Site: Big Lake, Skagit County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Asterionella

Authority: Hassal

Site: Lone Lake, Island County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Aulacoseira

Authority: Thwaites

Site: Big Lake, Skagit County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Cyclotella

Authority: (Kützing) Brébisson

Site: Lake Terrell, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Cymbopleura

Authority: (Krammer) Krammer

Site: Small pond near Lake Anderson, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Diatoma

Authority: Bory

Site: Tributary to Lake Padden, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Didymosphenia

Authority: Mart.Schmidt

Site: Chelan River, Chelan County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Encyonema

Authority: Kützing

Site: Chelan River, Chelan County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Entomoneis

Authority: Ehrenberg

Site: Lake Terrell, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Fragilaria

Authority: Lyngbye

Site: Lone Lake, Island County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Gomphonema

Authority: Ehrenberg

Site: Judy Reservoir, Skagit County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Melosira

Authority: C.Agardh

Site: Tributary to Lake Whatcom

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Meridium

Authority: C.Agardh

Site:

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Symmetric biraphid groupo

Authority: NA

Site: Silver Lake, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Pinnularia

Authority: Ehrenberg

Site: Small residential pond, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Semiorbis

Authority: (Ehrenberg) R.M.Patrick

Site: Lake Evan, Snohomish County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Stephanodiscus

Authority: Ehrenberg

Site: Lone Lake, Island County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Synedra

Authority: Ehrenberg

Site: Lake Samish, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Synedra

Authority: Ehrenberg

Site: Lake Whatcom, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Tabellaria

Authority: Ehrenberg ex Kützing

Site: Baker Lake, Whatcom/Skagit Counties, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Ulnaria

Authority: (Kützing) Compàre

Site: Lake Chelan, Chelan County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers

Phylum: Bacillariophyta

Taxon: Urosolenia

Authority: Round & R.M.Crawford

Site: Lake Squalicum, Whatcom County, WA

Comments: Diatoms are very common in nearly all freshwater lakes, ponds, streams, and rivers