Watertown Water Quality
New York
According to EPA SDWIS, Watertown, New York is served by 16 community water systems covering about 43,351 people. The same extract lists 172 health-based violation records, most recently coded 0300 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Watertown, New York is delivered through 16 EPA-regulated community water systems serving an estimated 43,351 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 172 violation records across the 16 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 6 distinct EPA contaminant codes: Interim Enhanced Surface Water Treatment Rule, PERFLUOROCTANE SULFONIC ACID (PFOS), TTHM, Total Haloacetic Acids (HAA5), Surface Water Treatment Rule and 1 others. 3 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the New York drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| WATERTOWN CITY | 27,861 | 22 | Health |
| LERAY TOWN WD 1, 2, 4 | 7,140 | 0 | Clean |
| SACKETS HARBOR VILLAGE | 2,200 | 0 | Clean |
| PAMELIA TOWN WD 4 & 5 | 1,857 | 45 | Health |
| WATERTOWN TOWN WD 3 & 4 & 5 | 750 | 12 | Health |
| HOUNSFIELD WD 2 | 725 | 29 | Health |
| HARRISVILLE (DIANA WD 1) | 700 | 0 | Clean |
| WATERTOWN TOWN WD 1 & 2 | 600 | 5 | Health |
| HOUNSFIELD WD 1, 5 | 480 | 20 | Health |
| LERAY TOWN WD 3 | 480 | 0 | Clean |
| HOUNSFIELD WD 3 (WESCOTT BEACH) | 270 | 0 | Clean |
| PAMELIA TOWN WD #2 | 150 | 15 | Health |
| EVERGREEN HILLS MHP | 78 | 0 | Clean |
| WADDINGTON ESTATES MHP (GU) | 60 | 14 | Health |
| DANC (WATERTOWN / FT. DRUM) | 0 | 3 | Health |
| DANC WESTERN REGIONAL | 0 | 7 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| WATERTOWN CITY | Interim Enhanced Surface Water Treatment Rule | 2025-12-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2025-10-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2025-07-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2025-07-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2025-01-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2024-10-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2024-10-01 |
| HOUNSFIELD WD 2 | TTHM | 2024-10-01 |
| DANC WESTERN REGIONAL | TTHM | 2024-10-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2024-07-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2024-07-01 |
| DANC WESTERN REGIONAL | TTHM | 2024-07-01 |
| DANC WESTERN REGIONAL | TTHM | 2024-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2024-04-01 |
| HOUNSFIELD WD 2 | TTHM | 2024-04-01 |
| HOUNSFIELD WD 2 | TTHM | 2024-04-01 |
| DANC WESTERN REGIONAL | TTHM | 2024-01-01 |
| DANC WESTERN REGIONAL | TTHM | 2024-01-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2023-10-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2023-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2023-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2023-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2023-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2023-07-01 |
| WATERTOWN CITY | TTHM | 2023-01-01 |
| WATERTOWN CITY | TTHM | 2023-01-01 |
| WATERTOWN CITY | TTHM | 2023-01-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2022-10-01 |
| HOUNSFIELD WD 2 | TTHM | 2022-10-01 |
| HOUNSFIELD WD 2 | TTHM | 2022-10-01 |
| HOUNSFIELD WD 2 | TTHM | 2022-10-01 |
| WATERTOWN TOWN WD 3 & 4 & 5 | TTHM | 2022-10-01 |
| WATERTOWN TOWN WD 3 & 4 & 5 | TTHM | 2022-10-01 |
| WATERTOWN CITY | TTHM | 2022-10-01 |
| WATERTOWN CITY | TTHM | 2022-10-01 |
| WADDINGTON ESTATES MHP (GU) | PERFLUOROCTANE SULFONIC ACID (PFOS) | 2022-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2022-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2022-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2022-07-01 |
| PAMELIA TOWN WD 4 & 5 | Total Haloacetic Acids (HAA5) | 2022-07-01 |
| PAMELIA TOWN WD 4 & 5 | Total Haloacetic Acids (HAA5) | 2022-07-01 |
| PAMELIA TOWN WD 4 & 5 | Total Haloacetic Acids (HAA5) | 2022-07-01 |
| WATERTOWN TOWN WD 3 & 4 & 5 | TTHM | 2022-07-01 |
| WATERTOWN TOWN WD 3 & 4 & 5 | TTHM | 2022-07-01 |
| WATERTOWN TOWN WD 1 & 2 | TTHM | 2022-07-01 |
| WATERTOWN TOWN WD 1 & 2 | TTHM | 2022-07-01 |
| WATERTOWN TOWN WD 1 & 2 | TTHM | 2022-07-01 |
| WATERTOWN CITY | TTHM | 2022-07-01 |
| WATERTOWN CITY | TTHM | 2022-07-01 |
| HOUNSFIELD WD 2 | TTHM | 2022-04-01 |
What are Watertown's health-based records for?
Watertown's health-based violation records carry 6 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Tthm | 126 | 8 |
| Total Haloacetic Acids (HAA5) | 31 | 6 |
| Perfluoroctane Sulfonic Acid (pfos) | 12 | 1 |
| Surface Water Treatment Rule | 1 | 1 |
| Interim Enhanced Surface Water Treatment Rule | 1 | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 | 1 |
TRI Facilities in Watertown
| Facility | Total Releases |
|---|---|
| Knowlton Technologies LLC | 13.7K lbs |
| New York Air Brake LLC | 46 lbs |
| Griffith Energy - Watertown | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Watertown, New York? ▼
How many water violations does Watertown have in this EPA extract? ▼
What contaminants were found in Watertown water? ▼
How many water systems serve Watertown? ▼
Where does Watertown get its drinking water? ▼
Are there pollution sources near Watertown? ▼
How does Watertown compare in New York?
Of the 841 New York places with at least one community water system on file, Watertown ranks #14 by number of systems (16).
Either side of it: Fishkill (16), Hopewell Jctn (16), Ballston Spa (15), Somers (15)
About This Data
Figures here are the current EPA SDWIS extract joined to the 16 community water systems whose service area lists Watertown, ranked against the 841 New York places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.