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2004 PRW Temperature Data in degrees C

NOTE: These results are preliminary pending a quality control review of data transfer procedures.

Date-->	5/22/2004	6/5/2004	6/19/2004	7/3/2004	7/17/2004	7/31/2004	8/14/2004	8/28/2004
SITE	Temp. (C)	Temp (C)	Temp.(C)	Temp.(C)	Temp.(C)	Temp.(C)	Temp.(C)	Temp.(C)	Max	Min	Avg
P200	16	13	19	20.5	20	22.5	20	22	22.5	13	19.1
P170	-	13	20	21	20	23	23	22	23	13	20.3
P160	-	13	20	21	20.5	22	22	21.5	22	13	20.0
P150	-	13	19	21	21	22	23	21.5	23	13	20.1
P135	17	18	21	22	22	nd	23	22	23	17	20.7
P110	17	10	22	22	22	23	22	21	23	10	19.9
P089	17	13	24	21	21	23	23	21	24	13	20.4
P080	16	13	24	21	21	23	23	21	24	13	20.3
P065	17	13	20	20	21	22	21	22	22	13	19.5
P060	16	13	15	22	21				22	13	17.4
P055						22	21	22	22	21	21.7
P050	-	-	21	22	21	22	21	22	22	21	21.5
P030	9.5	13.5	20	21.5	21	22	21.5	22	22	9.5	18.9
P020	13.5	14	20	21	21	22	21	21.5	22	13.5	19.3
P010	-	-	-	21	17	21	23	22	23	17	20.8
OB010	15	12	18	15	16	18	19	17	19	12	16.3
BB010	15	13	15	17	16	19.5	20	18	20	13	16.7
DB010	17	16	19	17	17	20	22	18	22	16	18.3
PL040	15	14	18	19	18	20	20	19	20	14	17.9
PL030	16	-	18	18.5	18	20	20	18.5	20	16	18.4
PL020	16.5	-	17.5	18.5	18	20	20	18.5	20	16.5	18.4
PL010	17	-	19	21.5	20	20	20	21	21.5	17	19.8
BL010	10	10.5	14.5	15	16	18	18.5	16	18.5	10	14.8
CW020	14	13	15.5	16	16.5	nd	19	17.5	19	13	15.9
CW010	14.5	11	19.5	19	18	20	19	18.5	20	11	17.4
DG010	-	13	18	18	18	29	19	19	29	13	19.1
SA010	-	9	11	12	nd	13	15	13	15	9	12.2
WE010	-	-	13	14	nd	16.5	17	15	17	13	15.1
NBL010	-	11	14.5	14.5	15	nd	18	16.5	18	11	14.9
L030	-	12	13	14.5	17	nd	18.5	16.5	18.5	12	15.3
L020	-	12	18	17	16	19	19	17	19	12	16.9
L010	-	13	16	17	19	18	17	17	19	13	16.7
IN010	16	12	19.5	19	18	20	19	18	20	12	17.7
M030	19	13	23	22.5	20.5	23	20	22	23	13	20.4
M010	9.5	13.5	16	16.5	17	18.5	19.5	19	19.5	9.5	16.2
PI020	14	-	-	17	16.5	19	28	22.5	28	14	19.5
PI010	15	-	-	18.5	17	19	28	19	28	15	19.4
TA010	-	12	18	19	17.5	16.5	19	17	19	12	17.0
TA040	11	10	15	16	14.5	19	nd	nd	19	10	14.3

WHAT DO THESE RESULTS MEAN?

The State Legislature has established statutes that classify Maine surface waters on the basis of water quality standards and intended uses. The Maine Department of Environmental Protection is charged with ensuring that these standards are met for all surface waters in the State. The classification scheme and standards for E. coli are as follows:

· Class A: suitable for drinking (after disinfection), swimming and fishing
· Class B: suitable for drinking (after treatment), swimming and fishing
· Class C: suitable for drinking (after treatment), swimming and fishing

The main stem of the Presumpscot River is Class A from the Eel Weir Dam to its confluence with the Pleasant River (just below sample site P150); Class B from the Pleasant River to the Saccarappa Dam (just below sample site P060); and Class C from the Saccarappa Dam to the estuary in Falmouth (just below the former site of the Smelt Hill Dam).

E. coli Standards
· Class A: as naturally occurs
· Class B: between May 15th and September 30th, E. coli may not exceed a seasonal geometric mean of 64 colony forming units (cfu's) per 100 mL or an instantaneous level of 427 cfu's per 100 mL
· Class C: between May 15th and September 30th, E. coli may not exceed a seasonal geometric mean of 142 cfu's per 100 mL or an instantaneous level of 949 cfu's per 100 mL

Class B sample sites are considered to be in violation of the State's water quality standards if the E. coli results are greater than 64 cfu's / 100 mL on any given sampling event or greater than 427 cfu's / 100 mL for the seasonal geometric mean. For Class C sample sites, E. coli cannot exceed 142 cfu's / 100 mL on an instantaneous basis or 949 cfu's / 100 mL for the seasonal geometric mean.

E. coli bacteria indicate the presence of fecal contamination that can originate from a variety of sources. These include point sources such as wastewater treatment plant discharges and combined sewer overflows; and nonpoint sources such as livestock waste from agricultural runoff, failing septic systems, pets and wildlife. E. coli by itself is generally not a threat to human health, but its presence is associated with disease-causing organisms that do pose potential health risks.

Despite the importance of measuring fecal concentrations in surface waters, it is virtually impossible to distinguish between the sources of fecal contamination with conventional test methods like the one used by PRW. However, routine monitoring can identify problem areas where the implementation of best management practices (BMPs) for nonpoint source pollution may help reduce fecal contamination. Such BMPs might include maintaining vegetated buffers along river or stream corridors; implementing erosion or sediment control measures for new construction; installing fencing for livestock; and establishing stormwater management practices to reduce urban and agricultural runoff.

Key to PRW Abbreviations: P = Main stem of Presumpscot River, BB = Baker Brook, BL = Black Brook, CW = Colley Wright Brook, DG = Douglas Brook, DB = Ditch Brook, IN = Inkhorn Brook, L = Little River, M = Mill Brook, N = Nason Brook, OB = Otter Brook, PI = Piscataqua River (not the same as one at ME-NH border), PL = Pleasant River, TA = Tannery Brook.

The "% complete" column indicates the number of samples actually collected compared to the number of samples intended for collection. PRW has 8 sampling events per season, so if only 4 samples were collected for the season the completion rate would be 50%.