Thompson, NY Tap Water Quality 2026

Water quality report for Thompson, NY — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Thompson's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Monticello Village PWSID: NY5203337 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS was detected below the federal limit.

Thompson earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: not detected

PFAS detected below the federal limit

60 violations since 2015, 2 health-based

No violations currently open

Thompson's lead level vs. all New York community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: Not detected — 0% of the federal action level

✓ Lower lead than % of New York utilities

Population Served

7424

~2000 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

60 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

0% of EPA action level

Not detected

Action level: 15 ppb

Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
CARBON, TOTAL	TREATMENT TECHNIQUE	—	TT	2021	Resolved
Endrin	MONITORING AND REPORTING	—	0.002 mg/L	2021–2023	Resolved
BHC-GAMMA	MONITORING AND REPORTING	—	0.0002 mg/L	2021–2023	Resolved
Methoxychlor	MONITORING AND REPORTING	—	0.04 mg/L	2021–2023	Resolved
Toxaphene	MONITORING AND REPORTING	—	0.003 mg/L	2021–2023	Resolved
Dalapon	MONITORING AND REPORTING	—	0.2 mg/L	2021–2023	Resolved
Di(2-ethylhexyl) adipate	MONITORING AND REPORTING	—	0.4 mg/L	2021–2023	Resolved
OXAMYL	MONITORING AND REPORTING	—	0.2 mg/L	2021–2023	Resolved
Simazine	MONITORING AND REPORTING	—	0.004 mg/L	2021–2023	Resolved
Di(2-ethylhexyl) phthalate	MONITORING AND REPORTING	—	0.006 mg/L	2021–2023	Resolved
Picloram	MONITORING AND REPORTING	—	0.5 mg/L	2021–2023	Resolved
Dinoseb	MONITORING AND REPORTING	—	0.007 mg/L	2021–2023	Resolved
Hexachlorocyclopentadiene	MONITORING AND REPORTING	—	0.05 mg/L	2021–2023	Resolved
Aldicarb sulfoxide	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Aldicarb sulfone	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Carbofuran	MONITORING AND REPORTING	—	0.04 mg/L	2021–2023	Resolved
Aldicarb	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Atrazine	MONITORING AND REPORTING	—	0.003 mg/L	2021–2023	Resolved
LASSO	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Heptachlor	MONITORING AND REPORTING	—	0.0004 mg/L	2021–2023	Resolved
Heptachlor epoxide	MONITORING AND REPORTING	—	0.0002 mg/L	2021–2023	Resolved
2,4-D	MONITORING AND REPORTING	—	0.07 mg/L	2021–2023	Resolved
2,4,5-TP	MONITORING AND REPORTING	—	0.05 mg/L	2021–2023	Resolved
HEXACHLOROBENZENE	MONITORING AND REPORTING	—	0.001 mg/L	2021–2023	Resolved
Benzo(a)pyrene	MONITORING AND REPORTING	—	0.0002 mg/L	2021–2023	Resolved
Pentachlorophenol	MONITORING AND REPORTING	—	0.001 mg/L	2021–2023	Resolved
Total Polychlorinated Biphenyls (PCB)	MONITORING AND REPORTING	—	0.0005 mg/L	2021–2023	Resolved
ETHYLENE DIBROMIDE	MONITORING AND REPORTING	—	0.00005 mg/L	2021–2023	Resolved
Chlordane	MONITORING AND REPORTING	—	0.002 mg/L	2021–2023	Resolved
Endrin	MONITORING AND REPORTING	—	0.002 mg/L	2021–2023	Resolved
BHC-GAMMA	MONITORING AND REPORTING	—	0.0002 mg/L	2021–2023	Resolved
Methoxychlor	MONITORING AND REPORTING	—	0.04 mg/L	2021–2023	Resolved
Toxaphene	MONITORING AND REPORTING	—	0.003 mg/L	2021–2023	Resolved
Dalapon	MONITORING AND REPORTING	—	0.2 mg/L	2021–2023	Resolved
Di(2-ethylhexyl) adipate	MONITORING AND REPORTING	—	0.4 mg/L	2021–2023	Resolved
OXAMYL	MONITORING AND REPORTING	—	0.2 mg/L	2021–2023	Resolved
Simazine	MONITORING AND REPORTING	—	0.004 mg/L	2021–2023	Resolved
Di(2-ethylhexyl) phthalate	MONITORING AND REPORTING	—	0.006 mg/L	2021–2023	Resolved
Picloram	MONITORING AND REPORTING	—	0.5 mg/L	2021–2023	Resolved
Dinoseb	MONITORING AND REPORTING	—	0.007 mg/L	2021–2023	Resolved
Hexachlorocyclopentadiene	MONITORING AND REPORTING	—	0.05 mg/L	2021–2023	Resolved
Aldicarb sulfoxide	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Aldicarb sulfone	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Carbofuran	MONITORING AND REPORTING	—	0.04 mg/L	2021–2023	Resolved
Aldicarb	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Atrazine	MONITORING AND REPORTING	—	0.003 mg/L	2021–2023	Resolved
LASSO	MONITORING AND REPORTING	—	—	2021–2023	Resolved
Heptachlor	MONITORING AND REPORTING	—	0.0004 mg/L	2021–2023	Resolved
Heptachlor epoxide	MONITORING AND REPORTING	—	0.0002 mg/L	2021–2023	Resolved
2,4-D	MONITORING AND REPORTING	—	0.07 mg/L	2021–2023	Resolved
2,4,5-TP	MONITORING AND REPORTING	—	0.05 mg/L	2021–2023	Resolved
HEXACHLOROBENZENE	MONITORING AND REPORTING	—	0.001 mg/L	2021–2023	Resolved
Benzo(a)pyrene	MONITORING AND REPORTING	—	0.0002 mg/L	2021–2023	Resolved
Pentachlorophenol	MONITORING AND REPORTING	—	0.001 mg/L	2021–2023	Resolved
Total Polychlorinated Biphenyls (PCB)	MONITORING AND REPORTING	—	0.0005 mg/L	2021–2023	Resolved
ETHYLENE DIBROMIDE	MONITORING AND REPORTING	—	0.00005 mg/L	2021–2023	Resolved
Chlordane	MONITORING AND REPORTING	—	0.002 mg/L	2021–2023	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2017	Resolved
TTHM	MCL EXCEEDANCE	0.0865 MG/L	0.080 mg/L	2015	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2015	Resolved

Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

60 violations are on record since 2015, of which 2 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Monticello Village

PWSID NY5203337

Water source Surface water — Drawn from surface water — SDWIS source code SW

Population served 7,424

Service connections 2,000

Systems serving this area 13

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Thompson tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open.

Does Thompson water have PFAS? ▼

PFAS was detected but stayed below the federal limit.

Who supplies water to Thompson? ▼

Monticello Village (PWSID NY5203337), one of 13 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2025-10-10. No significant deficiencies were recorded.

What Should Thompson Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

Check for a lead service line

Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.

Flush before drinking

If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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