Shoremont WTP			Brockport WTP			Hemlock WTP (Purchased Water)			Town of Ontario WTP (Purchased Water)
Parameter				Lake Ontario			Lake Ontario			Hemlock Lake			Lake Ontario
	EPA/NYS MCL	EPA/NYS MCLG	UNITS	Average	Range	Samples in 2001	Average	Range	Samples in 2001	Average	Range	Samples in 2001	Average	Range	Samples in 2001
Inorganics, Metals, Physical Parameters
Aluminum	NS	NS	ug/L	116	33 - 310	4	123	44 - 300	4	45	ND - 60	4	NR
Antimony	6	6	ug/L	ND		4	ND		4	ND		4	ND		1
Arsenic	10	NA	ug/L	ND	ND - 1.6	4	ND	ND - 1	4	ND	ND -1.6	4	ND		1
Barium	2	2	mg/L	0.023	0.019 - 0.029	4	0.021	0.020 - 0.023	4	0.019	0.017 - 0.023	4	0.023		1
Beryllium	4	4	ug/L	ND		4	ND		4	ND		4	ND		1
Bromide	NS	NS	mg/L	ND		5	ND		5	ND		5	NR
Cadmium	5	5	ug/L	ND		4	ND		4	ND		4	ND		1
Calcium	NS	NS	mg/L	36	34 - 38	4	35	34 - 37	4	28	26 - 29	4	NR
Chromium	100	100	ug/L	ND		4	ND		4	ND		4	ND
Copper  (Distribution System)	NS	NS	mg/L	ND		4	ND		4	ND	ND-0.01	4	NR
Copper (Customer Tap Samples)	AL*=1.3	1.3	mg/L	0.05	ND-0.14	32^(2000)	0.038	ND - 0.101	30	0.15	ND-0.78	18^(2000)	0.06	0.01 - 0.08	11^(1999)
Cyanide	200	200	ug/l	ND		4	ND		4	ND		4	ND		1
Fluoride	2.2	NA	mg/L	1.01	0.25 - 1.18	2121	1	0.11 - 1.25	1898	0.89	0.65 - 1.22	1076	1	0.85 - 1.15	730
Iron	300	NA	ug/L	ND		4	ND		4	ND		4	NR
Lead (Distribution System)	NS	NS	ug/L	ND		4	ND		4	ND		4	ND		1
Lead (Customer Tap Samples)	AL* = 15	0	ug/L	2	ND - 26	32^(2000)	ND	ND - 9	30	5	ND - 33	18^(2000)	ND		11^(1999)
Magnesium	NS	NS	mg/L	8.9	8.7 - 9.2	4	8.9	8.6 - 9.1	4	6.2	5.9 - 6.5	4	NR
Manganese	300	NA	ug/L	ND		4	ND		4	ND	ND - 3	4	NR
Mercury	2	2	ug/L	ND		4	ND		4	ND		4	ND		1
Nickel	100	NA	ug/L	ND		4	ND		4	ND		4	ND		1
Nitrate	10	NA	mg/L	0.38	ND - 0.5	4	0.34	ND - 0.4	4	0.09	ND - 0.2	4	2.13		1
Nitrite	1	1	mg/L	ND		4	ND		4	ND		4	ND		1
Ammonia Nitrogen	NS	NS	mg/L	0.1	ND - 0.1	4	0.2	ND - 0.2	4	0.1	ND - 0.1	4	NR
Potassium	NS	NS	mg/L	1.5	1.5 - 1.6	3	1.4	1.4 - 1.5	3	1.3	1.3	3	NR
Selenium	50	50	ug/L	ND		4	ND		4	ND		4	ND		1
Silver	100	NA	ug/L	ND		4	ND		4	ND		4	NR
Sodium	NS	NS	mg/L	12	12	3	11	11 - 12	3	16	15 - 17	3	NR
Sulfate	250	NA	mg/L	27	25 - 31	4	25	22 - 27	4	17	16 - 18	4	NR
Thallium	2	0.5	ug/L	ND		4	ND		4	ND		4	ND		1
Vanadium	NS	NS	ug/L	ND		4	ND		4	ND		4	NR
Zinc	5	NA	mg/L	ND		4	ND		4	ND		4	NR
Alkalinity	NS	NA	mg/L	84	83 - 85	4	83	81 - 85	4	67	66 - 69	4	NR
Chlorides	250	NA	mg/L	22	21 - 25	4	23	22 - 25	4	26	25 - 28	4	NR
Color	15	NA	Color Units	3	ND - 3	4	ND	ND - 3	4	ND	ND - 3	4	NR
Conductivity	NS	NS	umhos/cm	280	270 - 300	4	280	270 - 300	4	250	220 - 260	4	NR
pH	NS	NS	pH units	7.5	6.7 - 7.9	357	7.4	7.1 - 7.7	365	7.67	7.04 - 8.58	359	7.6	7.5 - 7.8	730
Total Dissolved Solids	NS	NS	mg/L	170	160 - 180	4	170	160 - 180	4	140	140	4	NR
Total Hardness	NS	NS	mg/L	125	121 - 133	4	124	120 - 130	4	94	89 - 97	4	NR
Total Organic Carbon	NS	NS	mg/L	1.8	1.6 - 2.1	4	1.9	1.8 - 2	4	2.4	2.1 - 2.5	4	NR
Turbidity - Entry Point	TT **	NA	NTUs	0.07	0.02 - 0.14	2101	0.03	0.01 - 0.19	1904	0.09	0.05 - 0.16	8659	0.04	0.02 - 0.08	4380
Turbidity - Distribution System	TT ***	NA	NTUs	0.13	0.04 - 0.14	1749	0.19	0.06 - 1	84	0.14	0.1 - 4.9	1366	0.16	0.05 - 0.35	365
Chlorine Residual - Entry Point	NS	NS	mg/L	1.23	0.84 - 1.7	8638	1.28	0.95 - 2.06	365	0.9	0.6 - 1.4	8662	1.1	0.9 - 1.2	4380
Chlorine Residual - Retail Dist.System	TT ****	NA	mg/L	0.81	0 - 1.4	1832	0.6	0.1 - 1	84	0.68	0 - 2.6	1451	0.8	0.5 - 1.1	365
Coliform - Retail Dist.System	TT *****	0	%Positive	ND		1834	ND		84	ND		1451	ND		120
Cryptosporidium & Giardia	NS	NS	#/100L	ND		6	ND		5	ND		4	ND		2
Asbestos (Distribution System)	7	7	MFL	ND		1^(1998)	NR			ND		1^(1996)	NR
Radionuclides
Gross Alpha	15	0	pC/L	ND		4^(1999)	ND		4^(1999)	ND		4^(2001)	NT
Gross Beta	50	0	pC/L	ND		4^(1999)	ND		4^(1999)	ND		4^(2001)	NT
Tritium	NS	NS	pC/L	ND		4^(1999)	ND		4^(1999)	NT			NT
Volatile Organics
Benzene	5	0	ug/L	Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected		4	Not Detected Not Detected Not Detected Not Detected Not Detected		4	Not Detected Not Detected Not Detected Not Detected Not Detected		4	Not Detected Not Detected Not Detected		1
Bromobenzene	5	NA	ug/L			4			4			4			1
Bromochloromethane	5	NA	ug/L			4			4			4			1
Bromomethane	5	NA	ug/L			4			4			4			1
2-Butanone (MEK)	50	NA	ug/L			4			4			4			1
n-Butylbenzene	5	NA	ug/L			4			4			4			1
sec-Butylbenzene	5	NA	ug/L			4			4			4			1
tert-Butylbenzene	5	NA	ug/L			4			4			4			1
Carbon Tetrachloride	5	0	ug/L			4			4			4			1
Chlorobenzene	5	NA	ug/L			4			4			4			1
Chloroethane	5	NA	ug/L			4			4			4			1
Chloromethane	5	NA	ug/L			4			4			4			1
2-Chlorotoluene	5	NA	ug/L			4			4			4			1
4-Chlorotoluene	5	NA	ug/L			4			4			4			1
dibromomethane	5	NA	ug/L			4			4			4			1
1,2-Dichlorobenzene	5	NA	ug/L			4			4			4			1
1,3-Dichlorobenzene	5	NA	ug/L			4			4			4			1
1,4-Dichlorobenzene	5	NA	ug/L			4			4			4			1
Dichlorodifluoromethane	5	NA	ug/L			4			4			4			1
1,1 Dichloroethane	5	NA	ug/L			4			4			4			1
1,2-Dichloroethane	5	0	ug/L			4			4			4			1
1,1-Dichloroethene	5	NA	ug/L			4			4			4			1
cis-1,2-Dichloroethene	5	NA	ug/L			4			4			4			1
trans-1,2-Dichloroethene	5	NA	ug/L			4			4			4			1
1,2-Dichloropropane	5	0	ug/L			4			4			4			1
1,3-Dichloropropane	5	NA	ug/L			4			4			4			1
2,2-Dichloropropane	5	NA	ug/L			4			4			4			1
1,1-Dichloropropene	5	NA	ug/L			4			4			4			1
1,3-Dichloropropene(Cis)	5	NA	ug/L			4			4			4			1
1,3-Dichloropropene(Trans)	5	NA	ug/L			4			4			4			1
Ethylbenzene	5	NA	ug/L			4			4			4			1
Hexachlorobutadiene	5	NA	ug/L			4			4			4			1
Isopropylbenzene	5	NA	ug/L			4			4			4			1
p-Isopropyltoluene	5	NA	ug/L			4			4			4			1
4-Methyl-2-Pentanone (MIBK)	50	NA	ug/L			4			3			4			1
Methyl Tert-butyl ether (MTBE)	50	NA	ug/L			4			4			4			1
Methylene Chloride (Dichloromethane)	5	0	ug/L			4			3			4			1
Naphthalene	50	NA	ug/L			4			4			4	6.4		1
Nitrobenzene	5	NA	ug/L			4			4			4	Not Detected		1
n-Propylbenzene	5	NA	ug/L			4			4			4			1
Styrene	5	NA	ug/L			4			4			4			1
1,1,1,2-Tetrachloroethane	5	NA	ug/L			4			4			4			1
1,1,2,2-Tetrachloroethane	5	NA	ug/L			4			4			4			1
Tetrachloroethene	5	0	ug/L			4			4			4			1
Toluene	5	NA	ug/L			4			4			4			1
1,2,3-Trichlorobenzene	5	NA	ug/L			4			4			4			1
1,2,4-Trichlorobenzene	5	NA	ug/L			4			4			4			1
1,1,1-Trichloroethane	5	NA	ug/L			4			4			4			1
1,1,2-Trichloroethane	5	3	ug/L			4			4			4			1
Trichloroethene	5	0	ug/L			4			4			4			1
Trichlorofluoromethane	5	NA	ug/L			4			4			4			1
1,2,3-Trichloropropane	5	NA	ug/L			4			4			4			1
1,2,4-Trimethylbenzene	5	NA	ug/L			4			4			4			1
1,3,5-Trimethylbenzene	5	NA	ug/L			4			4			4			1
Xylenes	5	NA	ug/L			4			4			4			1
Vinyl chloride	2	0	ug/L			4			4			4			1
Organics, Pesticides, Herbicides
Atrazine	3	3	ug/L			4	ND	ND - 0.1	4	Not Detected Not Detected Not Detected   Not Detected Not Detected Not Detected		4	Not Detected		1
Bis(2-Ethylhexyl)Phthalate	6	0	ug/L			4	ND	ND - 0.7	4			4	Not Detected		1
1, 2-Dibromo-3-Chloropropane	200	0	ng/L			4	Not Detected Not Detected Not Detected   Not Detected Not Detected Not Detected		4			4	Not Detected		1
1, 2-Dibromoethane (EDB)	50	0	ng/L			4			4			4	Not Detected		1
2, 4, 5-TP (Silvex)	10	NA	ug/L			4			4			4	Not Detected		1
2, 4-D	50	NA	ug/L			4			4			4	Not Detected		1
2,4 Dinitrotoluene	50	NS	ug/L			4			4			4	Not Detected		1
2,6 Dinitrotoluene	NS	NS	ug/L	4	4	4			Not Detected			1
Acenaphthylene	50	NA	ug/L	4	4	4			NR
Acetochlor	NS	NS	ug/L	4	4	4			Not Detected			1
Alachlor	2	0	ug/L	4	4	4			Not Detected			1
Aldicarb	3	1	ug/L	4	4	4			Not Detected			1
Aldicarb Sulfone	2	1	ug/L	4	4	4			Not Detected			1
Aldicarb Sulfoxide	4	1	ug/L	4	4	4			Not Detected			1
Aldrin	5	NA	ug/L	4	4	4			Not Detected			1
Alpha-BHC (Alpha Lindane)	5	NA	ug/L	4	4	4			NR
Anthracene	50	NA	ug/L	4	4	4			NR
Benzo(a)pyrene	200	0	ng/L	4	4	4			Not Detected			1
Benz(a)Anthracene	50	NA	ug/L	4	4	4			NR
Benzo(b)Fluoranthene	50	NA	ug/L	4	4	4			NR
Benzo(g,h,i)Perylene	50	NA	ug/L	4	4	4			NR
Benzo(k)Fluoranthene	50	NA	ug/L	4	4	4			NR
Beta-BHC	5	NA	ug/L	4	4	4			NR
Bromacil	50	NA	ug/L	4	4	4			NR
Butachlor	50	NA	ug/L	4	4	4			Not Detected			1
Butylbenzylphthalate	50	NA	ug/L	4	4	4			NR
Carbaryl	50	NA	ug/L	4	4	4			Not Detected			1
Carbofuran	40	40	ug/L	4	4	4			Not Detected			1
Chrysene	50	NA	ug/L	4	4	4			NR
Dacthal (DCPA)	50	NA	ug/L	4	4	4			NR
Dalapon	50	NA	ug/L	4	4	4			Not Detected			1
DCPA, Mono & Di-Acid Degradate	50	NS	ug/L	4	4	4			Not Detected			1
Di(2-Ethylhexyl) Adipate	50	NA	ug/L	4	4	4			Not Detected			1
Di-n-butylphthalate	50	NA	ug/L	4	4	4			NR
Dibenz(a,h)Anthracene	50	NA	ug/L	4	4	4			NR
Dicamba	50	NA	ug/L	4	4	4			NR
Dieldrin	5	NA	ug/L	4	4	4			Not Detected			1
Diethylphthalate	50	NA	ug/L	4	4	4			NR
Dimethoate	50	NA	ug/L	4	4	4			NR
Dimethylphthalate	50	NA	ug/L	4	4	4			NR
Dinoseb	7	7	ug/L	4	4	4			Not Detected			1
Dioxin	30	0	pg/L	4	4	4			Not Detected			1
Diquat	20	20	ug/L	4	4	4			Not Detected			1
Endosulfan I (alpha)	50	NA	ug/L	4	4	4			NR
Endosulfan II (beta)	50	NA	ug/L	4	4	4			NR
Endosulfan sulfate	50	NA	ug/L	4	4	4			NR
Endothall	50	NA	ug/L	4	4	4			Not Detected			1
Endrin	2	2	ug/L	4	4	4			Not Detected			1
EPTC	NS	NS	ug/L	4	4	4			Not Detected			1
Fluoranthene	50	NA	ug/L	4	4	4			NR
Glyphosate	50	NA	ug/L	4	4	4			Not Detected			1
Heptachlor	400	0	ng/L	4	4	4			Not Detected			1
Heptachlor Epoxide	200	0	ng/L	4	4	4			Not Detected			1
Hexachlorobenzene	1	0	ug/L	4	4	4			Not Detected			1
Hexachlorocyclopentadiene	5	NA	ug/L	4	4	4			Not Detected			1
Indeno(1,2,3,c,d)Pyrene	50	NA	ug/L	4	4	4			NR
Isophorone	50	NA	ug/L	4	4	4			NR
Lindane (gamma-BHC)	200	200	ng/L	4	4	4			Not Detected			1
Methomyl	50	NA	ug/L	4	4	4			Not Detected			1
Methoxychlor	40	40	ug/L	4	4	4			Not Detected			1
Metolachlor	50	NA	ug/L	4	4	4			Not Detected			1
Metribuzin	50	NA	ug/L	4	4	4			Not Detected			1
Mirex	5	NA	ug/L	4	4	4			NR
Molinate	50	NA	ug/L	4	4	4			Not Detected			1
Oxamyl	50	NA	ug/L	4	4	4			Not Detected		1
Paraquat	50	NA	ug/L	4	4	4			NR
PCB's Total	500	0	ng/L	4	4	4	Not Detected		1
Pentachlorophenol	1	0	ug/L	4	4	4	Not Detected		1
Phenanthrene	50	NA	ug/L	4	4	4	NR
Picloram	50	NA	ug/L	4	4	4	Not Detected		1
p,p' DDD	5	NA	ug/L	4	4	4	NR
p,p' DDE	NS	NS	ug/L	4	4	4	Not Detected		1
p,p' DDT	5	NA	ug/L	4	4	4	NR
Propachlor	50	NA	ug/L		4	4	Not Detected		4
Pyrene	50	NA	ug/L			4			4			4	NR
Simazine	4	4	ug/L			4			4			4	Not Detected		1
Total Chlordane	2	0	ug/L			4			4			4	Not Detected		1
Toxaphene	3	0	ug/L			4			4			4	Not Detected		1
Trifluralin	50	NA	ug/L			4			4			4	NR
Terbacil	NS	NS	ug/L			4			4			4	Not Detected		1
Perchlorate	NS	NS	ug/L			4			4			4	Not Detected		1
Disinfectant Byproducts
Total THMs	80	NA	ug/L	34	12 - 54	16	34	20 - 50	16	41	30 - 68	4	27	14 - 38	4
Halkoacetic Acids	60	NA	ug/L	11	2 - 22	16	16	6 -37	16	20	14 - 30	4	ND		4^(1999)
Halacetilenitriles	50	NA	ug/L	4.4	3.4-5.5	16^(1998)	NR			3.9	1.5-5.3	16^(1998)	NR
Haloketones	50	NA	ug/L	1.8	0.9-3.4	16^(1998)	NR			4.5	1.2-7.6	16^(1998)	NR
Chloropicrin	NS	NS	ug/L	NR		16^(1998)	NR			0.5	ND-0.8	16^(1998)	NR
Chloral Hydrate	NS	NS	ug/L	4.6	1.6-12	16^(1998)	NR			8.5	1.6-13	16^(1998)	NR
Total Organic Halides	NS	NS	ug/L	101	54-158	16^(1998)	NR			245	110-350	16^(1998)	NR

MCL = Maximum Contaminant Level, the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as possible.
MCLG = Maximum Contaminant Level Goal, the level of a contaminant below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
TT = Treatment Technique, a required process intended to reduce the level of a contaminant in drinking water.
AL = Action Level, the concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
Not Detected = ND = absent or present at less than testing method detection level. All testing methods are EPA approved with detection limits much less than the MCL.
NA = Not applicable
NR = Not required
NS = No standard
NT = Not Tested
mg/l = milligram (1/1,000 of a gram) per liter = ppm = parts per million
ug/l = microgram (1/1,000,000 of a gram) per liter = ppb = parts per billion
ng/L = nanogram (1/1,000,000,000 of a gram) per liter = ppt = parts per trillion
pg/L = picogram (1/1,000,000,000,000 of a gram) per liter = ppq = parts per quadrillion
pC/L = picoCuries per liter
NTU = Nephelometric turbidity Unit, a measure of the clarity of water.
MF/L = million fibers per liter, a measure of the presence of asbestos fibers longer than 10 micrometers
^(year) = Most recent testing. Monitoring frequency requirements vary depending on compound.
*Action level: If >10% of results are greater than 15 ug/l for lead or 1.3 mg/L for copper, remediative steps are required. In MCWA's combined retail area, 90% of the samples were less than 8 ug/Lfor lead and 0.151 mg/L for copper.
** = 95% of measurements within a given month must be less than <.5 NTUs.
*** = Average of monthly distribution system turbidity samples must be less than 5.0 NTUs.
**** = 95% of monthly distribution system samples must have a measurable chlorine residual.
Note: Total Hardness is also expressed in grains per gallon. The Total Hardness of the Ontario and Hemlock supplies are 7.6 and 5.6 grains per gallon respectively.