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Tap water quality report

Mcwa

EPA monitoring tested this supplier for 104 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
19
detected
525,262
people served
3
health-based violations
New York rankingsLead in New YorkPFAS in New York
Water source
Surface water
Ownership
Mixed public/private
Counties served
Monroe, Orleans

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

3
health-based violations
3
violations on file
3
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2025-01-01
TT Health-based Unaddressed 2025-01-01
TT Health-based Unaddressed 2025-01-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
70.25 µg/L 88%
of the EPA limit 80 µg/L
worst single sample: 93 µg/L
376/376 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
22 µg/L 37%
of the EPA limit 60 µg/L
worst single sample: 39 µg/L
354/374 SYR4 2012–2019
Chloroform
52.1 µg/L
No EPA limit set
worst single sample: 71 µg/L
279/279 SYR4 2012–2019
Bromodichloromethane
15 µg/L
No EPA limit set
worst single sample: 20 µg/L
278/279 SYR4 2012–2019
Dibromochloromethane
7.5 µg/L
No EPA limit set
worst single sample: 14 µg/L
277/279 SYR4 2012–2019
Trichloroacetic Acid
13 µg/L
No EPA limit set
worst single sample: 19 µg/L
263/278 SYR4 2012–2019
Dichloroacetic Acid
11 µg/L
No EPA limit set
worst single sample: 20 µg/L
214/279 SYR4 2012–2019
Bromoform
1.2 µg/L
No EPA limit set
worst single sample: 1.5 µg/L
169/279 SYR4 2012–2019
Nitrate
390 µg/L 3.9%
of the EPA limit 10000 µg/L
 26/26 SYR4 2012–2019
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Barium
23 µg/L 1.2%
of the EPA limit 2000 µg/L
 13/13 SYR4 2012–2019
Nitrate-Nitrite
390 µg/L 3.9%
of the EPA limit 10000 µg/L
 13/13 SYR4 2012–2019
Fluoride
736 µg/L 18%
of the EPA limit 4000 µg/L
worst single sample: 760 µg/L
9/13 SYR4 2012–2019
Monochloroacetic Acid
2.595 µg/L
No EPA limit set
worst single sample: 2.7 µg/L
8/279 SYR4 2012–2019
Atrazine
0.0732 µg/L 2.4%
of the EPA limit 3 µg/L
worst single sample: 0.0740 µg/L
5/13 SYR4 2012–2019
Dibromoacetic Acid
1.1 µg/L
No EPA limit set
 4/279 SYR4 2012–2019
Arsenic
2.6 µg/L 26%
of the EPA limit 10 µg/L
 1/13 SYR4 2012–2019
Monobromoacetic Acid
2.4 µg/L
No EPA limit set
 1/279 SYR4 2012–2019
Lithium
12.1 µg/L
No EPA limit set
 1/18 UCMR-5 2024
85 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
NAUGLE, KENNETH M
Phone
585-442-2001
Email
[email protected]

Frequently asked questions about Mcwa

Is Mcwa tap water safe to drink?

EPA monitoring detected 19 contaminants in Mcwa's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Mcwa's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Chloroform, Bromodichloromethane, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Mcwa serve?

Mcwa reports serving 525,262 people in New York, per its EPA record.

Has Mcwa had any water quality violations?

The EPA has 3 violations on file for Mcwa, of which 3 are health-based (a contaminant limit or required treatment was breached) and 3 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.