Is Warwick (T), NY Tap Water Safe to Drink?
Graded D+ — but Copper and Chlorate were detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
53.2/100
waterverge.com Warwick (T), NY — Water Quality Report
Warwick (T)'s drinking water received a grade of D+ (53.2 out of 100), indicating poor water quality. The city's 10 water systems serve approximately 6,744 residents using surface water.
Lead levels were measured at 1.0 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 327 violations on record, including 58 health-based violations. 46 remain unresolved.
What to know about Warwick (T)'s water
Warwick (T) ranks #772 out of 855 cities in New York for water quality, placing it among the lowest-rated 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.
Hexavalent chromium (chromium-6) was detected at 0.20 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.
Water quality score
See methodology →Is Warwick (T), NY water safe to drink?
Warwick (T)'s drinking water has significant quality concerns based on EPA testing data. With a grade of D+ (53.2/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 10 water systems serve approximately 6,744 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Warwick (T)
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Warwick (T)'s water quality assessment. Grade: D+ (53.2/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: Surface Water Treatment Rule.
Federal disaster declaration (FEMA DR-4615). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3572). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Warwick (T)'s water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Warwick (T)'s water system has 327 total violations on record, including 58 health-based violations. 46 remain unresolved. 5 violations were issued in the last 5 years.
Flood & environmental risk
Rockland County has experienced 10 federally declared disasters since 1999. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Croton R, Hackensack River, Lake Tappan At Old Tappan, Hackensack River At Rivervale, Pascack Brook At Park Ridge.
Where does Warwick (T)'s water come from?
Warwick (T)'s drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 10 water systems serving approximately 6,744 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Croton R (river), Hackensack River (river), Lake Tappan At Old Tappan (lake), Hackensack River At Rivervale (river), Pascack Brook At Park Ridge (river).
What Warwick (T) residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Warwick (T)'s water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Warwick (T)'s area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Drought conditions
D1 — moderate droughtOrange County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Rockland County has experienced 10 federally declared disasters since 1999. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Warwick (T)'s water supply, we recommend the following filter types.
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. | 1.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 5.00 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Warwick (T) compares by contaminant
Explore where Warwick (T) ranks among all New York cities for specific contaminants.
Water source & infrastructure
Where Warwick (T)'s water comes from
Warwick (T)'s drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
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 private ownership and serves approximately 6,744 people through 10 water systems.
Water bodies near Warwick (T)
Warwick (T) is located near 5 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Warwick (T)
| System Name | PWSID | Population | Source |
|---|---|---|---|
| BLUE LAKE | NY3512132 | 1,850 | SW |
| WESTSIDE GREENWOOD LAKE W.D. | NY3503566 | 1,700 | GW |
| WICKHAM VILLAGE | NY3505663 | 1,147 | GU |
| KINGS ESTATES | NY3521334 | 1,144 | GW |
| KNOLLS WATER CO., INC. | NY3503563 | 230 | GW |
| STERLING LAKE | NY3512133 | 225 | SW |
| PINE ISLAND WATER CO. | NY3503590 | 144 | GW |
| EURICH HEIGHTS | NY3505664 | 130 | GW |
| BELLVALE PARK W.D. | NY3503602 | 100 | GW |
| HILLSIDE (FKA RURAL ATLANTIC) | NY3503565 | 74 | GU |
How Warwick (T) compares
Full New York rankings →Warwick (T)'s score of 53.2/100 is below the average of 74/100 among major New York cities. It outscores 1 of 10 nearby cities. 9 of 10 nearby cities score higher.
Nearby cities
View New York rankings →About Warwick (T), NY
Wikipedia →West Nyack is a hamlet and census-designated place in the town of Clarkstown, Rockland County, New York, United States. It is located north of Blauvelt, east of Nanuet, southwest of Valley Cottage, southeast of Bardonia, and west of Central Nyack. It is approximately 18 miles (29 km) north of New York City. The population was 3,439 at the 2010 census.
Learn more about your water
Guides and resources related to Warwick (T)'s water quality findings.
Explore water quality across Orange
Frequently asked questions
Is Warwick (T), NY tap water safe to drink?
Warwick (T)'s water quality earned a grade of D+ (53.2/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #772 out of 855 cities tested in New York.
What contaminants are in Warwick (T)'s water?
Lead was measured at 1.0 ppb (90th percentile). 327 violations are on record.
How is Warwick (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 Warwick (T)?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Warwick (T)'s water come from?
Warwick (T)'s water is sourced from Surface water. The city has 10 water systems serving approximately 6,744 residents.
What health violations has Warwick (T)'s water system had?
Warwick (T) has 58 health-based violations on record. The most recent violation was recorded in February 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 46 violations remain unresolved.
How does Warwick (T)'s water compare to other cities?
Warwick (T) ranks #772 out of 855 cities in New York (better than 10% of state cities) and #12706 out of 15744 cities nationally (19th percentile). The grade of D+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.