Smithtown Water District (NY) Water Quality Smithtown Water District is a large public water system in EPA region 2 that provides tap water for the 11754 zip codes. It has 3 facilities where the water supply was tested for 65 chemical contaminants that impact tap water quality and human health.
The maximum reported level of HAA5 (five regulated haloacetic acids) was 2.78 µg/L. The maximum reported level of Manganese was 0.48 µg/L. There were 2 contamintants found in the Smithtown Water District water supply at levels that were above the minimum reporting level.
Contaminants Jump To Contaminant 1,1-dichloroethane 1,2,3-trichloropropane 1,3-butadiene 1,4-dioxane 1-butanol 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid 1H,1H,2H,2H-perfluorodecane sulfonic acid 1H,1H,2H,2H-perfluorohexane sulfonic acid 1H,1H,2H,2H-perfluorooctane sulfonic acid 2-methoxyethanol 2-propen-1-ol (Allyl Alcohol) 4,8-dioxa-3H-perfluorononanoic acid 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid alpha-hexachlorocyclohexane bromochloromethane (Halon 1011) bromomethane Butylated Hydroxyanisole chlorate chlorodifluoromethane (HCFC-22) chloromethane chlorpyrifos chromium chromium-6 cobalt dimethipin ethoprop Germanium HAA5 (five regulated haloacetic acids) HAA6Br (six brominated haloacetic acids) HAA9 (nine haloacetic acids) hexafluoropropylene oxide dimer acid (GenX) lithium Manganese molybdenum N-ethyl perfluorooctanesulfonamidoacetic acid N-methyl perfluorooctanesulfonamidoacetic acid nonafluoro-3,6-dioxaheptanoic acid o-toluidine oxyfluorfen perfluoro(2-ethoxyethane)sulfonic acid perfluoro-3-methoxypropanoic acid perfluoro-4-methoxybutanoic acid perfluorobutanesulfonic acid perfluorobutanoic acid perfluorodecanoic acid perfluorododecanoic acid perfluoroheptanesulfonic acid perfluoroheptanoic acid perfluorohexanesulfonic acid perfluorohexanoic acid perfluorononanoic acid perfluorooctanesulfonic acid perfluorooctanoic acid perfluoropentanesulfonic acid perfluoropentanoic acid perfluorotetradecanoic acid perfluorotridecanoic acid perfluoroundecanoic acid profenofos quinoline strontium tebuconazole Total Permethrin tribufos vanadium
Entry Point to Dist. System
0.31 µg/L
⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.28 µg/L
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Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.1 µg/L
Below Reporting Level
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Entry Point to Dist. System
0.39 µg/L
⚠️ Exceeds Reporting Level of 0.07 µg/L by 0.32 µg/L
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Entry Point to Dist. System
<2 µg/L
Below Reporting Level
Entry Point to Dist. System
<2 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.005 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.005 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.005 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.4 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.4 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.5 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.5 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.002 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.01 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.01 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.06 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.2 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
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Accompsett Elementary School
23 µg/L
⚠️ Exceeds Reporting Level of 20 µg/L by 3 µg/L
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Entry Point to Dist. System
<0.08 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.2 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
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Entry Point to Dist. System
0.42 µg/L
⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.22 µg/L
Accompsett Elementary School
0.33 µg/L
⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.13 µg/L
Entry Point to Dist. System
0.96 µg/L
⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.76 µg/L
Accompsett Elementary School
0.55 µg/L
⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.35 µg/L
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Entry Point to Dist. System
0.3 µg/L
⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.27 µg/L
Accompsett Elementary School
0.23 µg/L
⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.2 µg/L
Entry Point to Dist. System
0.82 µg/L
⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.79 µg/L
Accompsett Elementary School
0.39 µg/L
⚠️ Exceeds Reporting Level of 0.03 µg/L by 0.36 µg/L
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Entry Point to Dist. System
<1 µg/L
Below Reporting Level
Accompsett Elementary School
<1 µg/L
Below Reporting Level
Entry Point to Dist. System
<1 µg/L
Below Reporting Level
Accompsett Elementary School
<1 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.2 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.2 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.3 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.3 µg/L
Below Reporting Level
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ECSS Sweetbriar Nature Center
0.44 µg/L
Meets Reporting Threshold
Accompsett Elementary
0.21 µg/L
Meets Reporting Threshold
Accompsett Elementary
2.78 µg/L
Meets Reporting Threshold
ECSS Sweetbriar Nature Center
0 µg/L
Meets Reporting Threshold
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ECSS Sweetbriar Nature Center
0.93 µg/L
Accompsett Elementary
0 µg/L
Accompsett Elementary
2.6 µg/L
ECSS Sweetbriar Nature Center
0.35 µg/L
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ECSS Sweetbriar Nature Center
0.93 µg/L
Accompsett Elementary
0.21 µg/L
Accompsett Elementary
4.3 µg/L
ECSS Sweetbriar Nature Center
0.35 µg/L
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Entry Point to Dist. System
<0.005 µg/L
Below Reporting Level
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Entry Point to Dist. System
<9 µg/L
Below Reporting Level
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Entry Point to Dist. System
0.48 µg/L
Meets Reporting Threshold
Entry Point to Dist. System
<0.4 µg/L
Below Reporting Level
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Entry Point to Dist. System
<1 µg/L
Below Reporting Level
Accompsett Elementary School
<1 µg/L
Below Reporting Level
Entry Point to Dist. System
<1 µg/L
Below Reporting Level
Accompsett Elementary School
<1 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.005 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.006 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.02 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.007 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.007 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.05 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.05 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.004 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.09 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.09 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.005 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.01 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.01 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.03 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.004 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.02 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.02 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.004 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.04 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.04 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.004 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.02 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.02 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.004 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.003 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.008 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.007 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.002 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.3 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.3 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.02 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.02 µg/L
Below Reporting Level
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Entry Point to Dist. System
33.3 µg/L
⚠️ Exceeds Reporting Level of 0.3 µg/L by 33 µg/L
Accompsett Elementary School
31.7 µg/L
⚠️ Exceeds Reporting Level of 0.3 µg/L by 31.4 µg/L
Entry Point to Dist. System
74.6 µg/L
⚠️ Exceeds Reporting Level of 0.3 µg/L by 74.3 µg/L
Accompsett Elementary School
36.6 µg/L
⚠️ Exceeds Reporting Level of 0.3 µg/L by 36.3 µg/L
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Entry Point to Dist. System
<0.2 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.2 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.04 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.04 µg/L
Below Reporting Level
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Entry Point to Dist. System
<0.07 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.07 µg/L
Below Reporting Level
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Entry Point to Dist. System
0.24 µg/L
⚠️ Exceeds Reporting Level of 0.2 µg/L by 0.04 µg/L
Accompsett Elementary School
<0.2 µg/L
Below Reporting Level
Entry Point to Dist. System
<0.2 µg/L
Below Reporting Level
Accompsett Elementary School
<0.2 µg/L
Below Reporting Level
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Sampling Facilities Intertie
Ground Water (GW) Entry Point to Dist. SystemEntry Point to the Distribution System (EP)
Distribution System
Ground Water (GW) Accompsett ElementaryDistribution System (DS)
ECSS Sweetbriar Nature CenterDistribution System (DS)
Distribution System
Ground Water (GW) Accompsett Elementary SchoolMaximum Residence Time (MR)
FAQ Is Smithtown Water District tap water safe to drink? When was Smithtown Water District last tested for water contamination? The latest water samples were taken on February 3rd, 2025.
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