MANHASSET-LAKEVILLE WATER DISTRICT
2007
TABLE OF DETECTED CONTAMINANTS
 
PARAMETER Violation Level Level Date of Regulatory Regulatory Unit of Likely Source
Yes/No Detected Detected Highest Limit Goal Measure of
    (Range) (Average) Dectection (MCL) (MCLG)   Contaminant
PHYSICAL

 
pH No 7.6 - 7.8 7.7 26-Nov 6.5 - 8.5 N/A N/A        
Alkalinity No 24.5 - 32 28.3 31-May N/A N/A mg/l Naturally present in the
Total Dissolved Solids No 105 - 169 141 31-May 500 N/A mg/l environment
Total Hardness No 57 - 79.2 66.5 31-May N/A N/A mg/l        
   
INORGANIC CONTAMINANTS  
Calcium No 11.7 - 15.5 13.2 31-May N/A N/A mg/l  
Chloride No 14.6 - 30.5 22.7 31-May 250 250 mg/l Erosion of natural
Sulfate No 11.5 - 18.6 13.7 31-May 250 N/A mg/l Deposits
Magnesium No 6.8 - 9.9 8.2 31-May N/A N/A mg/l        
Sodium No 10.8 - 13.8 12.0 31-May * * mg/l        
                 

NITRATE

 
Nitrate No 2.6 -6.8 4.8 12-Dec 10 10 mg/l Leaching from septic tanks
   
TRIHALOMETHANES  
Dibromochloromethane No ND - 0.8 ND 26-Nov 50 N/A ug/l Disinfection byproducts
Bromoform No ND - 1.4 .90 17-Sep 50 N/A ug/l
                       
LEAD & COPPER  
Lead No ND - 16.4 4** 13-Jul-05 AL = 15 0 mg/l Corrosion of household
Copper No ND - .45 0.14** 1-Jun-05 AL = 1.3 1.3 mg/l plumbing
TOTAL COLIFORM No One Positive Sample 17-Sep-07 Over 5% of Samples Positive Naturally occurring

* Water containing more than 20 mg/l of sodium should not be used for drinking by people on severly restricted sodium diets. Water containing more than 270 mg/l of sodium should not be used for drinking by people on moderately restricted sodium diets.
** The level presented represents the 90th percentile of the 30 sites tested. The 90th percentile is equal to or greater than 90% of the copper values detected in the water system.

THE DISTRICT IS PROUD TO REPORT THAT YOUR TAP WATER
CONTINUES TO MEET OR EXCEED ALL FEDERAL, STATE, AND LOCAL STANDARDS
FOR DRINKING WATER QUALITY.

CONTAMINANTS TESTED FOR BUT NOT DETECTED
1,1,1,2-Tetrachloroethane 2-Chlorotoluene Isopropylbenzene 2,4-D Diquat Antimony
1,1,1-Trichloroethane 4-Chlorotoluene m,p-Xylene 3-Hydroxycarbofuran Endothall Arsenic
1,1,2,2-Tetrachloroethane 4-Isopropyltoluene Methyl tert-butyl ether Alachlor Endrin Barium
1,1,2-Trichloroethane Benzene Methylene chloride Aldicarb Glyphosate Beryllium
1,1-Dichloroethane Bromobenzene n-Butylbenzene Aldicarb sulfone Heptachlor Cadmium
1,1-Dichloroethene Bromochloromethane n-Propylbenzene Aldicarb sulfoxide Heptachlor epoxide Chromium
1,1-Dichloropropene Bromodichloromethane o-Xylene Aldrin Hexachlorobenzene Copper
1,2,3-Trichlorobenzene Bromomethane sec-Butylbenzene Atrazine Hexachlorocyclopentadiene Lead
1,2,3-Trichloropropane Carbon tetrachloride Styrene Benzo(a)pyrene Lindane Manganese
1,2,4-Trichlorobenzene Chlorobenzene tert-Butylbenzene bis(2-Ethylhexyl)adipate Methomyl MBAS
1,2,4-Trimethylbenzene Chloroethane Tetrachloroethene Bis(2-ethylhexyl)phthalate Methoxychlor Mercury
1,2-Dichlorobenzene Chloroform Toluene Butachlor Metolachlor Nickel
1,2-Dichloroethane Chloromethane trans-1,2-Dichloroethene Carbaryl Metribuzin Nitrogen,
1,2-Dichloropropane cis-1,2-Dichloroethene trans-1,3-Dichloropropene Carbofuran Oxamyl Selenium
1,3,5-Trimethylbenzene cis-1,3-Dichloropropene Trichloroethene Chlordane Pentachlorophenol Silver
1,3-Dichlorobenzene Dibromochloromethane Trichlorofluoromethane Dalapon Picloram Thallium
1,3-Dichloropropane Dibromomethane Vinyl chloride Dicamba Propachlor Zinc
1,4-Dichlorobenzene Ethylbenzene 1,2-Dibromo-3-chloropropane Dieldrin Simazine  
Dichlorodifluoromethane Free Cyanide 1,2-Dibromoethane Dinoseb Total PCBs  
2,2-Dichloropropane Hexachlorobutadiene 2,4,5-TP (Silvex) Dioxin Toxaphene