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Community Water System · PWS NY3401150

Canandaigua City

Canandaigua, New York 14424 - drinking water served from surface water sources to 11,264 people, tracked in EPA SDWIS and UCMR5.

11,264
People served
98
EPA violations
9
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 98 drinking-water violations at Canandaigua City, 9% of them health-based - above the New York per-system average.

98
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
11,264
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Canandaigua City

Canandaigua City is a local-owned community water system that delivers drinking water to 11,264 residents in Canandaigua, New York (Ontario County) through 4,232 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 98 total violations for this system , of which 9 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 86 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 9 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across New York, EPA tracks 8,098 public water systems serving 19,294,951 people, with 552,003 cumulative violations and 26,817 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 68.2 violations. Statewide, 129 of 332 UCMR5-tested systems have reported PFAS detections (38.9%).

Canandaigua City's 98 violations sit above the New York average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
11,264
Total Violations
98
Health-Based Violations
9
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
4,232
County
Ontario
School/Daycare
No
MCL Violations
9
Monitoring Violations
86
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 9 2007
Endrin MR 3 2016
Dalapon MR 3 2016
OXAMYL MR 3 2016
Di(2-ethylhexyl) phthalate MR 3 2016
Dinoseb MR 3 2016
Hexachlorocyclopentadiene MR 3 2016
Aldicarb sulfone MR 3 2016
Aldicarb MR 3 2016
Atrazine MR 3 2016
LASSO MR 3 2016
2,4-D MR 3 2016
2,4,5-TP MR 3 2016
Benzo(a)pyrene MR 3 2016
Pentachlorophenol MR 3 2016
ETHYLENE DIBROMIDE MR 3 2016
Methoxychlor MR 3 2016
Di(2-ethylhexyl) adipate MR 3 2016
Heptachlor MR 3 2016
Carbofuran MR 3 2016
Total Polychlorinated Biphenyls (PCB) MR 3 2016
HEXACHLOROBENZENE MR 3 2016
Heptachlor epoxide MR 3 2016
Simazine MR 3 2016
BHC-GAMMA MR 3 2016
Chlordane MR 3 2016
Aldicarb sulfoxide MR 3 2016
Toxaphene MR 3 2016
Picloram MR 3 2016
Consumer Confidence Rule Other 2 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFBS 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 9/5/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 9/5/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 9/5/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 9/5/2023 <8.00 ppt 8.00 ppt Not Detected
ADONA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 9/5/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 9/5/2023 <6.00 ppt 6.00 ppt Not Detected
PFHxS 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/5/2023 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 9/5/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 9/5/2023 <2.00 ppt 2.00 ppt Not Detected
PFHpS 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/5/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 9/5/2023 <4.00 ppt 4.00 ppt Not Detected
4:2 FTS 9/5/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/5/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 9/5/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 9/5/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 9/5/2023 <2.00 ppt 2.00 ppt Not Detected
8:2 FTS 9/5/2023 <5.00 ppt 5.00 ppt Not Detected
11Cl-PF3OUdS 9/5/2023 <5.00 ppt 5.00 ppt Not Detected
NEtFOSAA 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 6/6/2023 <6.00 ppt 6.00 ppt Not Detected
ADONA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 6/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 6/6/2023 <7.00 ppt 7.00 ppt Not Detected
9Cl-PF3ONS 6/6/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 6/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Canandaigua City.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID NY3401150 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

New York Drinking Water Authority

New York State Department of Health, Public Water Systems is the primacy agency that licenses and inspects Canandaigua City under EPA-delegated authority.

Open NY regulator portal

Source: New York State Department of Health, Public Water Systems

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 CARBON, TOTAL MR 2 SDWIS / NY3401150 / 2920
2016 Endrin MR 3 SDWIS / NY3401150 / 2005
2016 Dalapon MR 3 SDWIS / NY3401150 / 2031
2016 OXAMYL MR 3 SDWIS / NY3401150 / 2036
2016 Di(2-ethylhexyl) phthalate MR 3 SDWIS / NY3401150 / 2039
2016 Dinoseb MR 3 SDWIS / NY3401150 / 2041
2016 Hexachlorocyclopentadiene MR 3 SDWIS / NY3401150 / 2042
2016 Aldicarb sulfone MR 3 SDWIS / NY3401150 / 2044
2016 Aldicarb MR 3 SDWIS / NY3401150 / 2047
2016 Atrazine MR 3 SDWIS / NY3401150 / 2050
2016 LASSO MR 3 SDWIS / NY3401150 / 2051
2016 2,4-D MR 3 SDWIS / NY3401150 / 2105
2016 2,4,5-TP MR 3 SDWIS / NY3401150 / 2110
2016 Benzo(a)pyrene MR 3 SDWIS / NY3401150 / 2306
2016 Pentachlorophenol MR 3 SDWIS / NY3401150 / 2326

How Canandaigua City Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Canandaigua City New York avg Federal benchmark
Total violations 98 68.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 9 3.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 11,264 2,383 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 8,098 regulated public water systems in New York.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Canandaigua City water safe to drink? ▼
Canandaigua City (PWS ID: NY3401150) has 98 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 11,264 people using Surface Water sources.
How many people does Canandaigua City serve? ▼
Canandaigua City serves 11,264 people in Canandaigua, New York. It is a Local-owned system using Surface Water water sources with 4,232 service connections.
What type of violations does Canandaigua City have? ▼
Canandaigua City has 98 total violations: 9 health-based violations (MCL exceedances or treatment failures), 86 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Canandaigua City water? ▼
No. Canandaigua City was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Canandaigua City use? ▼
Canandaigua City uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

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

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