01The verdict: is North Castle (T) water safe?
North Castle (T)'s drinking water has significant quality concerns based on EPA testing data. With a grade of A- (87.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 5 water systems serve approximately 2,500 residents using surface water (rivers, lakes, or reservoirs).
7 unresolved violations on record
EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 0.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓A flood-prone service area
10 federal disaster declarations on record. After severe weather, watch for boil-water advisories.
See the risk factors ↓North Castle (T)'s drinking water received a grade of A- (87.4 out of 100), indicating good water quality. The city's 5 water systems serve approximately 2,500 residents using purchased surface water.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 19 violations on record, including 0 health-based violations. 7 remain unresolved.
North Castle (T) ranks #351 out of 810 cities in New York for water quality, placing it mid-range in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. As a small community water system, North Castle (T) may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in North Castle (T)'s water
Every contaminant flagged in North Castle (T), on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in New York
Cities ranked by compounds detected Cu Copper in New York
Cities ranked by 90th-percentile copper
03North Castle (T)'s ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 19 violations on record, including 0 health-based violations. 7 remain unresolved.
6 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 4.4 ppb since 1993. Latest reading: 0 ppb (2027) — 0% of the action level. Sampled at higher-risk homes (90th percentile).
04Where North Castle (T)'s water comes from
North Castle (T)'s drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Purchased Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Wholesale supplier
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
5 systems
5 water systems, operated under local government ownership.
2,500 people
Residents served across North Castle (T)'s service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by local government ownership and serves approximately 2,500 people through 5 water systems.
| System name | PWSID | Population | Source |
|---|---|---|---|
| NORTH CASTLE WATER DISTRICT #1 | NY5903445 | 2,500 | Purchased Surface Water |
| NORTH CASTLE WATER DISTRICT #4 | NY5922909 | 1,225 | Groundwater |
| NORTH CASTLE WATER DISTRICT #2 | NY5903446 | 1,200 | Groundwater |
| NORTH CASTLE WATER DISTRICT #5 | NY5903492 | 225 | Purchased Groundwater |
| SAINT NERSESS ARMENIAN SEMINARY | NY5930011 | 32 | Groundwater |
Water bodies near North Castle (T)
As a surface-water system, these water bodies may directly influence North Castle (T)'s drinking water supply.
05Pressure on North Castle (T)'s watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Flood & storm history
10 federal disaster declarations on record for Westchester County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
Drought
Westchester County is in D2 (severe drought) per the U.S. Drought Monitor (week of Jul 2026). Drought can raise disinfection-byproduct levels and taste/odor issues as utilities draw from lower reservoirs.
06How North Castle (T) compares
Scores for nearby New York cities on one line, with the average marked.
dashed line = New York average (78/100)
North Castle (T) scores 87.4/100 — above the New York average of 78/100. It outscores 8 of 10 nearby cities. Full New York rankings →
89 / 100CBrookhaven (T), NY
60.9 / 100AEast Hampton (T), NY
85.1 / 100BIslip (T), NY
71.8 / 100BSmithtown (T), NY
84.8 / 100BSouthampton (T), NY
78.8 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in North Castle (T)'s water — not generic advice.
A basic carbon filter still helps
North Castle (T)'s water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for North Castle (T) alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →Frequently asked questions
Is North Castle (T), NY tap water safe to drink?
North Castle (T)'s water quality earned a grade of A- (87.4/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #351 out of 810 cities tested in New York.
What contaminants are in North Castle (T)'s water?
Lead was measured at 0.0 ppb (90th percentile). 19 violations are on record.
How is North Castle (T)'s water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in North Castle (T)?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does North Castle (T)'s water come from?
North Castle (T)'s water is sourced from Purchased surface water. The city has 5 water systems serving approximately 2,500 residents.
How does North Castle (T)'s water compare to other cities?
North Castle (T) ranks #351 out of 810 cities in New York (better than 57% of state cities) and #4041 out of 15382 cities nationally (74th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.