Public water system record
New Castle/Stanwood W.D.
Serves an area of Westchester County, NY that includes Chappaqua and Millwood · 17,116 people served
Federal records show no health-based violations and 2 monitoring/reporting issues for New Castle/Stanwood W.D. in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 2
Key facts
- New Castle/Stanwood W.D. buys its water from New York City System.
- Record on file since 2002, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 2 lead and 327 unknown out of 5,680 service lines.
Check whether New Castle/Stanwood W.D. serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
Full record since 2002
EPA's records for New Castle/Stanwood W.D. go back to 2002. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 18 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 1 | 18 |
| October 19, 2016 to 2019 | 0 | 2 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2009, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2009 | Resolved |
Where the water comes from
New Castle/Stanwood W.D. buys its water from New York City System. It lists no wells or intakes of its own. It also has an emergency connection to New York City - Croton System. 5 other community water systems buy water from New Castle/Stanwood W.D. 4 other public water systems have emergency connections to New Castle/Stanwood W.D.
Buys water from
- New York City System Valhalla, NY
Emergency or part-time connections to
- New York City - Croton System Katonah, NY
Community systems that buy water from it
- Applehill Farm Water District Valhalla, NY
- Kitchawan Water District Yorktown Heights, NY
- Mill River Water District Valhalla, NY
- Old Farm Hill Water District Valhalla, NY
- Pleasantville Water District Pleasantville, NY
Annual water quality report
New Castle/Stanwood W.D. must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by New York.
Certified drinking water labs by state EPA guidance for private wells