Is Greenwich American Center water safe to drink?

Greenwich American Center (PWS ID: CT0570062) has 288 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 800 people using Groundwater sources.

How many people does Greenwich American Center serve?

EPA SDWIS reports that Greenwich American Center serves 800 people (this public water system's service population, not the municipal population of Greenwich or any other city). It is a Private-owned system using Groundwater water sources with 2 service connections. The operator address is listed in Greenwich, Connecticut.

What type of violations does Greenwich American Center have?

Greenwich American Center has 288 total violations: 4 health-based violations (MCL exceedances or treatment failures), 254 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Greenwich American Center water?

No. Greenwich American Center was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does Greenwich American Center use?

Greenwich American Center uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.

Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Where does Greenwich American Center sit among U.S. public water systems?

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Greenwich American Center ranks #22,409 of 29,740 by people served, and #120 of 184 in Connecticut. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

How does Greenwich American Center's violation count compare nationally?

Greenwich American Center has 288 recorded EPA SDWIS violations, fewer than 10% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 90% of that cohort has fewer violations than Greenwich American Center. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → Connecticut

Non-Transient Non-Community Water System · PWS CT0570062

Greenwich American Center

Operator location Greenwich, Connecticut - smaller served population (≤ 999) at 800 people served; 288 SDWIS violations on record from groundwater sources.

Compiled by PlainWater · May 15, 2026

800
People served (this PWS) Smaller third of systems: 288
EPA violations (this PWS) Upper third of systems: 4
Health-based (this PWS) Middle third by health-based share: No PFAS
UCMR5 (this PWS) Tested, none detected

Follow published updates (RSS)

Greenwich American Center standing, high SDWIS violation third

800 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #22,409 of 29,740 among systems serving 500+.

The verdict

Greenwich American Center sits in the upper third of the sitemap cohort by violation count (288), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (800; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 1% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.

#22,409 of 29,740
Population · /systems: #120 of 184
Population · CT: 288
Total EPA violations on record: 1%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

Water Safety Score

27/100

Greenwich American Center

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations D

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

284

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination N/A

Tested, none detected

Highest PFAS compound level detected in UCMR5 testing

System Details

System Type: Non-Transient Non-Community
Owner Type: Private
Connections: 2
County: Fairfield
School/Daycare: No
MCL Violations: 0
Monitoring Violations: 254
Treatment Tech Violations: 4

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
1,2,4-Trichlorobenzene	MR	10	2019
DICHLOROMETHANE	MR	10	2019
Vinyl chloride	MR	10	2019
trans-1,2-Dichloroethylene	MR	10	2019
1,1,1-Trichloroethane	MR	10	2019
Trichloroethylene	MR	10	2019
Tetrachloroethylene	MR	10	2019
CHLOROBENZENE	MR	10	2019
Toluene	MR	10	2019
Ethylbenzene	MR	10	2019
Styrene	MR	10	2019
cis-1,2-Dichloroethylene	MR	10	2019
p-Dichlorobenzene	MR	10	2019
Carbon tetrachloride	MR	10	2019
1,1,2-Trichloroethane	MR	10	2019
o-Dichlorobenzene	MR	10	2019
1,2-Dichloroethane	MR	10	2019
1,2-Dichloropropane	MR	10	2019
Benzene	MR	10	2019
1,1-Dichloroethylene	MR	10	2019
Coliform (TCR)	MR	9	2007
Total Haloacetic Acids (HAA5)	MR	6	2019
TTHM	MR	6	2019
Public Notice	Other	5	2025
Chlorine	MR	5	2007
Lead and Copper Rule	MR	4	2022
Revised Total Coliform Rule	TT	4	2023
Chromium	MR	2	2002
CYANIDE	MR	2	2002
Fluoride	MR	2	2002

Violation Count vs. the National Corpus

Greenwich American Center has 288 recorded EPA violations, 90% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 10% carry more. 1% of this system's own violations are health-based (4 of 288), and it ranks #22,409 of 29,740 by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

288 Higher than most more violations than 90% of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

How many violations vs. how serious, among peer systems

Greenwich American Center plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Greenwich American Center. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

City of Ballinger: 372 violations, 85% health-based
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Greenwich American Center: 288 violations, 1% health-based (this system)
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFUnA	8/9/2023	<2.00 ppt	2.00 ppt	Not Detected
PFHxA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFDoA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFDA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFOA	8/9/2023	<4.00 ppt	4.00 ppt	Not Detected
PFOS	8/9/2023	<4.00 ppt	4.00 ppt	Not Detected
11Cl-PF3OUdS	8/9/2023	<5.00 ppt	5.00 ppt	Not Detected
PFBS	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFNA	8/9/2023	<4.00 ppt	4.00 ppt	Not Detected
PFMBA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
NMeFOSAA	8/9/2023	<6.00 ppt	6.00 ppt	Not Detected
PFHxS	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFTrDA	8/9/2023	<7.00 ppt	7.00 ppt	Not Detected
PFEESA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFHpA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
9Cl-PF3ONS	8/9/2023	<2.00 ppt	2.00 ppt	Not Detected
PFPeS	8/9/2023	<4.00 ppt	4.00 ppt	Not Detected
PFHpS	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFTA	8/9/2023	<8.00 ppt	8.00 ppt	Not Detected
NFDHA	8/9/2023	<20.00 ppt	20.00 ppt	Not Detected
NEtFOSAA	8/9/2023	<5.00 ppt	5.00 ppt	Not Detected
PFBA	8/9/2023	<5.00 ppt	5.00 ppt	Not Detected
ADONA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
PFPeA	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
HFPO-DA	8/9/2023	<5.00 ppt	5.00 ppt	Not Detected
6:2 FTS	8/9/2023	<5.00 ppt	5.00 ppt	Not Detected
4:2 FTS	8/9/2023	<3.00 ppt	3.00 ppt	Not Detected
8:2 FTS	8/9/2023	<5.00 ppt	5.00 ppt	Not Detected
PFMPA	8/9/2023	<4.00 ppt	4.00 ppt	Not Detected
PFEESA	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFBA	2/22/2023	<5.00 ppt	5.00 ppt	Not Detected
6:2 FTS	2/22/2023	<5.00 ppt	5.00 ppt	Not Detected
4:2 FTS	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
8:2 FTS	2/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFMPA	2/22/2023	<4.00 ppt	4.00 ppt	Not Detected
NFDHA	2/22/2023	<20.00 ppt	20.00 ppt	Not Detected
PFMBA	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
HFPO-DA	2/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFPeS	2/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFDoA	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFPeA	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
ADONA	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
9Cl-PF3ONS	2/22/2023	<2.00 ppt	2.00 ppt	Not Detected
11Cl-PF3OUdS	2/22/2023	<5.00 ppt	5.00 ppt	Not Detected
PFHxS	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFHxA	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFDA	2/22/2023	<3.00 ppt	3.00 ppt	Not Detected
PFOA	2/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFOS	2/22/2023	<4.00 ppt	4.00 ppt	Not Detected
PFNA	2/22/2023	<4.00 ppt	4.00 ppt	Not Detected

Population served record for Greenwich American Center

EPA SDWIS lists 800 people served and 2 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.

EPA SDWIS · PWS CT0570062

Sources: EPA SDWIS

Nationwide peers

288 violations · 800 served: nearest cross-state SDWIS matches.

Cross-state systems with comparable violation load

Nearest cross-state community systems (500+ served) by total SDWIS violations on record.

4 peers

Cross-state systems with smaller service footprints

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Greenwich American Center

Use this system's EPA-reported record as a starting filter, not a final verdict.

See how every tracked system in Connecticut compares on the same EPA violation measures. Connecticut systems
Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
Find and compare another public water system by name or PWSID. Search systems

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.