NAS - Nonindigenous Aquatic Species

Specimen ID	State	County	Locality	Year	HUC Number	Drainage name	Status
35053	MD		Potomac River	1854	02070008	Middle Potomac-Catoctin	established
35052	MD		state non-specific	1874	02000000	Mid Atlantic Region	established
35092	MD		state non-specific	1875	02000000	Mid Atlantic Region	established
613213	MD	Allegany	Sideling Hill Creek	1998	02070003	Cacapon-Town	established
613203	MD	Caroline	Garland Pond, 3 Miles Northeast of Denton, Caroline County, Maryland	1949	02060005	Choptank	established
613204	MD	Caroline	Harmony Pond, Near Preston, Caroline Co., Maryland	1949	02060005	Choptank	established
613205	MD	Cecil	Susquehanna-Atlantic Ocean Drainage: Canowingo Creek: Canowingo Lake Rd. ~ 10 km W rising Sun; 1st riffle upstream of mouth: 1.5 km from bridge (TJN07-22)	2007	02050306	Lower Susquehanna	established
613206	MD	Cecil	Susquehanna-Atlantic Ocean Drainage: Canowingo Creek: Canowingo Lake Rd. ~ 10 km W rising Sun; 1st riffle upstream of mouth: 1.5 km from bridge (TJN07-22)	2007	02050306	Lower Susquehanna	established
280535	MD	Charles	Potomac River, Mattawoman Creek tidal embayment, ca. 2.2 miles of lower reach from Smallwood State Park area upstream to above mouth of Marbury Run, 3.1-1.1 air miles SW-S center Indian Head	2011	02070011	Lower Potomac	established
747002	MD	Charles	Potomac River, Mattawoman Creek tidal embayment, ca. 2.2 miles of lower reach from Smallwood State Park area upstream to above mouth of Marbury Run, 3.1-1.1 air miles SW-S center Indian Head	2011	02070011	Lower Potomac	established
613207	MD	Charles	Zekiak Swamp Run	1998	02070011	Lower Potomac	established
613208	MD	Dorchester	Higgins Mill Pond, Near Railroad Bridge, Dorchester County, Maryland	1949	02080110	Tangier	established
613214	MD	Frederick	Monocacy River, Thurmont, Md.	1998	02070009	Monocacy	established
613215	MD	Frederick	Monocacy River.	1998	02070009	Monocacy	established
613216	MD	Howard	Patapsco River, Ellicott City, Md.	1998	02060003	Gunpowder-Patapsco	established
747129	MD	Montgomery	Potomac River, 0.7 mile reach from E end of Swainsons Island upstream to head of Plummers Island and I-495 bridge, SW edge of Bethesda	2010	02070008	Middle Potomac-Catoctin	established
746857	MD	Montgomery	Potomac River, side channels on N side of Swainsons Island, ca. 0.5 miles downstream (E of) I-495 crossing, SW side of Bethesda	2010	02070008	Middle Potomac-Catoctin	established
746832	MD	Montgomery	Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda	2010	02070008	Middle Potomac-Catoctin	established
280527	MD	Montgomery	Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda	2010	02070008	Middle Potomac-Catoctin	established
280530	MD	Montgomery	Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda	2010	02070008	Middle Potomac-Catoctin	established
613209	MD	Prince George's	Cash(?) Lake Prince Georges County Maryland.	1942	02060006	Patuxent	established
613211	MD	Prince George's	Henson Cr., Pr. Georges Co., Maryland	1934	02070010	Middle Potomac-Anacostia-Occoquan	established
613210	MD	Washington	Cascade Lake At Camp Titchie, Near Penmar, Washington Co., Md.	1949	02070004	Conococheague-Opequon	established
157937	MD	Washington	Chesapeake and Ohio Canal National Historical Park	1999	02070004	Conococheague-Opequon	established
613212	MD	Washington	Hagerstown, Md	1998	02070004	Conococheague-Opequon	established

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

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