Reading the Public Water System Record as a Homeowner
Median Lead Levels Reflect Plumbing, Not Source Water
The New York City public water system report shows a lead 90th percentile at 0.01 mg/L based on samples collected through household plumbing, not directly from the source water. This figure helps characterize typical lead concentration across sampled homes but does not specify individual water quality in any one residence.
Range of Measurements Indicates Variety in Plumbing Conditions
Sampling from many connections reveals variation in lead levels, reflecting differences in plumbing materials and home conditions, not changes in municipal source water quality.
Distinguishing Aesthetic Secondary Standards from Health-Based Limits
Lead Concentrations Relate to Distribution System, Not Taste or Appearance
Lead is regulated as a health-based contaminant, unlike substances controlled for aesthetic reasons such as taste or staining. A detection of lead in distribution samples does not mean the water is necessarily unsafe, but it identifies a potential exposure point that can be addressed.
Secondary Standards Address Corrosion and Appearance, Not Health Violations
Secondary standards target factors like discoloration or corrosivity which affect water quality perception, but these are distinct from health concerns monitored by federal regulations.
Variation Over Time in New York City's Water Quality Record
Sampling Dates Indicate Ongoing Monitoring Through 2024
The data includes recent samples, such as a lead survey conducted at the end of 2024, demonstrating continuous efforts to assess water quality characteristics in the public system.
Long-Term Trends Help Identify Changes in Distribution System Conditions
Evaluating data over multiple years can reveal patterns related to aging infrastructure or treatment adjustments, guiding planning and consumer awareness.
Interpreting Measurement Ranges Against Federal Standards
Detected Levels Below Regulatory Action Triggers
The reported lead concentrations are below the EPA action level established for public water systems, indicating no federal violation recorded for this system at this time.
Detection Does Not Equal Violation or Unsafe Water
A detection means the presence of a contaminant was measured; it does not inherently imply the water is unsafe or out of compliance.
Comparing Your Area with Nearby Counties
System-Wide Data Serves Multiple Counties Together
New York City's water system serves Bronx, Kings, New York, Queens, and Richmond counties collectively, so water quality figures apply broadly rather than reflecting differences within each county.
Avoid Overreading Differences Based on Separate Sampling
Comparisons with adjacent county records involving different water systems should consider source and treatment variations rather than assuming uniform conditions.
Sample Size and Well Representation Behind the Figures
More Than 7,270,000 Connections Support a Large Data Set
The public record covers over 7 million service connections, indicating a substantial sampling basis for reported statistics.
Sample Size Limits Specificity to Individual Homes
While overall system data is robust, a sample may be small regarding a particular home's unique plumbing, underlining the need for private testing to determine individual water quality.
Summary and Next Steps
The New York City public water system record, covering Bronx, Kings, New York, Queens, and Richmond counties, provides system-wide data on water quality characteristics such as lead levels in distribution samples. It reflects a broad monitoring program with ongoing sampling through 2024 but cannot specify conditions at any particular home. Households interested in precise knowledge of their own tap water are advised to conduct private testing. To address potential lead presence, the Fleck Safe Drinking Water Filter ships ready to configure and can provide an additional safeguard for household water quality. For complete official data, consult the EPA public water system record for NY7003493.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2024-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA SDWIS record for NEW YORK CITY SYSTEM (NY7003493), surface water supply, serving 8271000 people: 1 health-based violations of 10 total; lead 90th percentile 0.01 mg/L
- ✓ 90-Day Money-BackNo restocking fees — return within 90 days.
- ✓ Manufacturer WarrantyGenuine Fleck · Pentair · VIQUA equipment.
- ✓ Free Expert SizingTalk to a specialist and buy the right system the first time.