Putnam County, NY Water Quality

About Putnam County water

How water works in Putnam County

Putnam County (county seat: Carmel) mixes municipal water systems in its cities, villages, and denser towns with private wells that remain common in its more rural areas. Which setup you have — and therefore how you check your water — depends on your specific address, not just the county.

Here, drinking water comes from a mix of sources — Hudson River intakes, local and New York City watershed reservoirs, and groundwater wells.

Your provider

Water system providers in Putnam County

In Putnam County, water is supplied by small municipal districts and many private wells; New York City's Croton-system reservoirs pass through the county. One address can still fall within more than one system, so confirm the provider on a recent bill or with the official lookup tools below.

Water systems (federal records)

Community water systems serving Putnam County

Federal EPA drinking-water records list 101 active community water systems serving Putnam County, together reported to serve about 37,674 people. The largest are shown below (by population served). Click a PWS ID for that system's federal report.

…and 86 more, mostly smaller community systems. Full federal records for every system are on EPA ECHO.

Source: EPA Safe Drinking Water Information System (SDWIS), pulled July 2026. Population and connection figures are SDWIS-reported estimates. This lists community systems only — it excludes private wells and transient systems. Confirm the exact system for an address on a water bill.

Compliance

Violations and notices in Putnam County

Of the 101 community water systems serving Putnam County, federal EPA records show 29 with at least one health-based violation on record over the years. A violation can range from a monitoring/reporting lapse to an exceedance that has since been resolved — open a system's federal report (linked in the table above) or its current Consumer Confidence Report for the specifics and current status.

Water characteristics

What Putnam County water is typically like

Hudson Valley water hardness varies widely by source — reservoir-fed systems tend to be soft, while groundwater wells can be moderately hard or high in iron and manganese. River-sourced systems focus on filtration and disinfection-byproduct control.

Regional patterns are a general guide only — hardness, iron, and other traits vary by specific system and well. Your CCR (or a well test) is the authoritative source for your address.

Local water-quality context

Putnam County: naturally occurring radon and hard well water

Much of Putnam County relies on private wells drilled into bedrock, where naturally occurring radon, hardness, and occasionally arsenic or uranium can appear. Well owners are responsible for their own testing.

This is documented regional background, not an address-level test result. Always confirm current conditions in your provider's latest Consumer Confidence Report (CCR) or, for a private well, with your own certified lab test.

Small community systems (Veolia)

Veolia-operated small water systems in Putnam County

Putnam County includes a number of small community water systems operated by Veolia Water New York (serving individual developments, HOAs, and hamlets). Selected 2025 reported values from their official annual reports:

First-pass readings from each system's official Veolia annual water quality report (linked) — confirm against the source. Lead/copper columns show the number of sampled sites above the action level (15 ppb lead / 1.3 ppm copper); "0 over AL" means compliant. Nitrate MCL is 10 mg/L. These are small groundwater systems; values are system-specific.

PFAS monitoring (EPA UCMR5)

PFAS testing in Putnam County

2 water systems in Putnam County participated in the EPA's fifth Unregulated Contaminant Monitoring Rule (UCMR5), which tested for 29 PFAS compounds and lithium in 2023–2025. In this round, no PFAS were detected above the reporting level in the Putnam County results collected so far. See our New York drinking water standards guide for how PFAS is regulated here.

Read the fine print

What these records don't show

The system and compliance records above come from federal data. Some things people ask about are not captured here and should be confirmed directly:

• Contaminant levels at your tap. Actual values (lead, PFAS, nitrate, disinfection byproducts, etc.) come only from your system's Consumer Confidence Report or your own well test — we do not publish or estimate them.
• Water hardness. Not in the federal system records. Ask your utility for the CCR hardness value or use a home hardness test. See our hard-water guide.
• Taste, odor, color, and staining. These aesthetic issues are not standardized here; your CCR's secondary-contaminant notes and your own observations are the best guide.
• Year-over-year change. We don't track how a system's results changed from last year — compare this year's CCR to last year's using the report links.

Detailed local guides

Town & city water guides in Putnam County

Deeper guides naming the specific water provider and local context for each place:

Carmel · Mahopac · Brewster · Cold Spring

Find your report

How to find your water provider and report

1. Check a recent water bill for your water system or district name.
2. Look up that system and its most recent Consumer Confidence Report (CCR) using the official tools below.
3. On a private well? A CCR won't apply — see our private well testing guide.

• NYSDOH Drinking Water Protection Program
• EPA ECHO · EPA SDWIS federal reports
• Our step-by-step CCR finder guide

Confirm it's your water

Make sure a report is actually yours

1. Find the provider name and PWS ID printed on your water bill — a town name or ZIP alone is not enough to identify the system.
2. Match that PWS ID to the systems table above (or search it on EPA ECHO).
3. Open that system's current CCR for the official results and any notices.
4. For a point-of-use concern (especially lead), use a certified laboratory test for your specific tap — the system-wide report can meet standards while an individual older home does not.

Lead & older homes

Lead and service lines in Putnam County

Lead is almost never in the water leaving a treatment plant — it typically enters from a lead service line or older home plumbing. A system-wide CCR can meet the lead action level while an individual older home shows a higher result at the tap. New York requires public water systems to inventory their lead service lines, so ask your utility for its inventory, and confirm your own tap with a certified laboratory test. See our lead & copper guide and utility report vs. home tap test.

Communities

Cities, towns, villages, and hamlets in Putnam County

Local guidance in Putnam County is most relevant to these cities, towns, villages, and hamlets:

• Carmel
• Mahopac
• Brewster
• Cold Spring
• Kent
• Patterson
• Putnam Valley
• Philipstown
• Southeast
• Garrison
• Nelsonville
• Lake Carmel

Representative ZIP codes

A sample of ZIP codes in Putnam County (not a complete list; one ZIP can span multiple systems):

• 10512
• 10541
• 10509
• 10516
• 10537
• 12563
• 10579
• 10524
• 10542
• 10512

Improve your water

Common Putnam County home water steps

Authoritative resources

Official & academic water resources for Putnam County

For primary data and research beyond this guide, these New York agencies and universities are the authoritative sources:

• NYSDOH — Drinking Water Protection Program
• NYSDEC — Water
• USGS — New York Water Science Center
• Cornell University — NYS Water Resources Institute: Drinking Water

FAQ

Frequently asked questions

Who provides drinking water in Putnam County?

small municipal districts and many private wells; New York City's Croton-system reservoirs pass through the county. Federal records list 101 active community water systems in the county. Check a recent water bill or the lookup tools to confirm the exact system serving your address.

How do I find my water quality report in Putnam County?

Every community water system must publish an annual Consumer Confidence Report (CCR). Identify your provider first, then request its current CCR from the provider or through NYSDOH. Private wells are not covered by a CCR and must be tested independently.

Is Putnam County water hard or soft?

Hudson Valley water hardness varies widely by source — reservoir-fed systems tend to be soft, while groundwater wells can be moderately hard or high in iron and manganese.

Are there water-quality violations in Putnam County?

Federal EPA records show 29 of the county's 101 community water systems with a health-based violation on record over the years; open a system's federal report or current CCR for status.

Does this page publish local test results?

No. We publish the systems, sources, and compliance records that come from federal data, but not address-level contaminant values — those come only from each provider's official CCR and the NYS Department of Health.

Last reviewed: July 2026