TapGraded
B

NEW YORK CITY SYSTEM

Valhalla, NY · 8,271,000 served

NEW YORK CITY SYSTEM serves 8,271,000 people in Valhalla, NY. It has 0 health-based violations in the last 5 years. TapGraded gives this system a B.

Score breakdown

Health-based violations (5y)

0

Monitoring violations (5y)

0

Currently unaddressed

0

Overall score

85/100

Violation history (last 5 years)

No violations on record.

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Lead (Lead and Copper Rule)

EPA's current lead action level is 15 ppb (dropping to 10 ppb in 2027 under the Lead and Copper Rule Improvements).

90th-percentile lead sample 10 ppb
0 ppb EPA action level: 15 ppb

PFAS (UCMR5 occurrence data)

PFNA (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt
PFOS (not detected) 0 ppt
0 ppt EPA MCL: 4 ppt
HFPO-DA (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt
PFOA (not detected) 0 ppt
0 ppt EPA MCL: 4 ppt
PFHxS (not detected) 0 ppt
0 ppt EPA MCL: 10 ppt

System details

System type
Community water system
Water source
Surface water
Ownership
Local government
Service connections
727,058

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Frequently asked questions

Is Valhalla, NY tap water safe to drink?

NEW YORK CITY SYSTEM has 0 health-based violations in the last 5 years. TapGraded gives this system a B.

Does NEW YORK CITY SYSTEM have lead in its water?

The most recent 90th-percentile lead sample is 10 ppb, versus the EPA action level of 15 ppb.

Has PFAS been detected in NEW YORK CITY SYSTEM's water?

This system was tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.

Source: EPA SDWIS/ECHO · Data as of 2026Q2