Water Quality Analysis of Low pH for Evitts Creek in Allegany County, Maryland

Water Quality Analyses (WQA) with EPA Concurrence of MDE's Findings: Evitts Creek

Evitts Creek (basin code 02141002), located in portions of Allegany County, Maryland and Bedford County, Pennsylvania, was identified on the State’s list of WQLSs as impaired by low pH (1996 listing), nutrients (1996 listing) and sediments (1996 listing).  A sub-basin, Lake Habeeb (Rocky Gap Lake) impoundment, was also listed in 1998 for nutrients.  The information used for listing the 8-digit basin for low pH was found in the 1996 303(b) report.  The report available below provides an analysis of recent monitoring data to address whether the low pH impairment still remains. 

Overall, this analysis demonstrates that the applicable aquatic life criteria for pH and the aquatic life designated uses supported by these criteria are being met in Evitts Creek 8-digit basin.   A localized pH impairment has been located at station RKG0023 and RKG0041 on Rocky Gap Run, where 5/12 (42%) and 2/17 (12%) of the samples, respectively, were below the acceptable minimum pH to support aquatic life uses in the basin.  A potential pH impairment has been located at station ELL0008 on Elk Lick Run, where 1/6 (17%) of the samples were above the acceptable maximum pH to support aquatic life uses.  There is insufficient data to list station ELL0008 as impaired therefore the stream segment represented by this station will be placed in Category 3a of the 303(d) list which includes surface waters that have insufficient quantity (Category 3a) or quality (Category 3b) data and information to determine water body attainment status.  For the localized impairment found in Rocky Gap Run, the impairment will remain in Category 5 of the 303(d) list for the stream segment represented by stations RKG0023 and RKG0041.

Barring the receipt of any contradictory data, this report will be used to support the removal of the 8-digit basin from Maryland’s list of WQLSs for low pH when MDE proposes the revision of Maryland’s 303(d) list for public review in the future.  A TMDL for nutrients in Lake Habeeb was completed in 1999.  A sediment TMDL was completed in 2006. The nutrient impairment will be addressed at a future date.

Although the non-tidal waters of the Evitts Creek watershed do not display signs of impairment due to low pH, the State reserves the right to require additional pollution controls in Evitts Creek watershed if evidence suggests that acidity resulting in low pH from the basin is contributing to downstream water quality problems.

 

Water Quality Analysis of Low pH for Evitts Creek in Allegany County, Maryland

(Concurrence Dec. 16, 2005)

EPA's Decision Letter

EPA's Decision Letter

Main Report 

WQA_Evitts_pH.pdf (818KB)

Comment Response Document

CRD_Evitts_pH.pdf (57KB)
 
Contact Information

Please direct questions or comments concerning this project to Maryland's TMDL Program at (410) 537-3572.


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