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This creek originates in Adams County, PA and flows through York County on its way to the Susquehanna River. Overall, the creek is warm, wide and deep. The upper reach of the creek flows through some of Pennsylvania's most popular orchards. The middle reach of the creek is difficult to sample due to six dams spaced a few miles apart from each other.

Research on Conewago Creek was performed by Michael Burrell and Jeff Erikson

General chemical factors:

Total Hardness (mg/L): 83

Alkalinity (mg/L): 65

Nitrate-Nitrogen (mg/L): 1.7

Phosphorus (mg/L): 0.5

Conductivity (uS/cm): 95

List of Insects caught in the riffle regions:

Coleoptera

Dytiscidae Agabus

Elmidae Optioservus and Stenelmis

Psephenidae Psephenus

Diptera

Chironomidae

Empididae Clinocera

Simuliidae Simulium

Tipulidae Tipula

Ephemeroptera

Baetidae Acentrella, Baetis and Centroptilum

Canidae Caenis

Ephemeridae Ephemera

Ephemerellidae Danella, Drunella, Ephemerella and Serratella

Heptageniidae Leucrocuta, Stenonema and Stenacron

Leptophlebiidae Paraleptophlebia

Isonychidae Isonychia

Siphlonuridae Parameletus

Potomanthidae Anthopotamanthus

Tricorythidae Tricorythodes

Megaloptera

Corydalidae Corydalus

Odonata

Coenagrionidae Argia

Gomphidae Stylogomphus

Plecoptera

Nemouridae Amphinemura and Nemoura

Perlidae Beloneuria and Perlesta

Taeniopterygidae Strophopteryx

Trichoptera

Hydropsychidae Ceratopsyche, Cheumatopsyche,and Hydropsyche

Philopotamidae Chimarra

Polycentropidae Polycentropus

Psycomyiidae Psychomyia

Uenoidae Neophylax