Is Troy Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Lincoln

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2012-12-01 → 2012-12-31
MCL	Health-based	Resolved	2012-12-01 → 2012-12-31
MCL	Health-based	Resolved	2012-12-01 → 2012-12-31
MCL	Health-based	Resolved	2012-12-01 → 2012-12-31
MCL	Health-based	Resolved	2012-05-01 → 2012-05-31
MCL	Health-based	Resolved	2012-05-01 → 2012-05-31
MCL	Health-based	Resolved	2012-05-01 → 2012-05-31
MCL	Health-based	Resolved	2012-05-01 → 2012-05-31
MCL	Health-based	Resolved	2010-01-01 → 2010-12-31
MCL	Health-based	Resolved	2010-01-01 → 2010-12-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	161.6 µg/L 12% of the EPA limit 1300 µg/L worst single sample: 304 µg/L	69/69	SYR4	2014–2019
Nitrate-Nitrite	62 µg/L 0.6% of the EPA limit 10000 µg/L worst single sample: 100 µg/L	56/70	SYR4	2012–2019
Lead	4.715 µg/L 31% of the EPA limit 15 µg/L worst single sample: 6.07 µg/L	31/69	SYR4	2014–2019
Combined Radium (-226 And -228)	4.4 pCi/L 88% of the EPA limit 5 pCi/L worst single sample: 4.9 pCi/L	23/24	SYR4	2013–2019
Lead	0.0016 mg/L 11% of the EPA limit 0.0150 mg/L	21/21	LCR	2025
Bromoform	3.757 µg/L No EPA limit set worst single sample: 4.42 µg/L	14/18	SYR4	2013–2019
Dibromochloromethane	2.778 µg/L No EPA limit set worst single sample: 2.79 µg/L	13/18	SYR4	2013–2019
Lithium	251 µg/L No EPA limit set	10/10	UCMR-5	2024
Barium	27.7 µg/L 1.4% of the EPA limit 2000 µg/L	9/9	SYR4	2014–2019
Fluoride	2318 µg/L 58% of the EPA limit 4000 µg/L worst single sample: 2330 µg/L	9/9	SYR4	2014–2019
Gross Alpha, Excl. Radon And U	18.14 pCi/L 121% of the EPA limit, at the 95th percentile of samples — 15 pCi/L worst single sample: 18.7 pCi/L	9/9	SYR4	2013–2017
Chromium	7.5255 µg/L 7.5% of the EPA limit 100 µg/L worst single sample: 7.55 µg/L	8/9	SYR4	2014–2019
TTHM	6.66 µg/L 8.3% of the EPA limit 80 µg/L worst single sample: 7.86 µg/L	7/9	SYR4	2013–2019
Bromodichloromethane	1.515 µg/L No EPA limit set worst single sample: 1.67 µg/L	6/18	SYR4	2013–2019
Arsenic	4.6915 µg/L 47% of the EPA limit 10 µg/L worst single sample: 4.84 µg/L	4/9	SYR4	2014–2019
Selenium	10.206 µg/L 20% of the EPA limit 50 µg/L worst single sample: 10.5 µg/L	3/9	SYR4	2014–2019
Cadmium	3.4 µg/L 68% of the EPA limit 5 µg/L	1/9	SYR4	2014–2019
Chloroform	0.5100 µg/L No EPA limit set	1/18	SYR4	2013–2019
Combined Uranium	1.788 µg/L 6% of the EPA limit 30 µg/L	1/9	SYR4	2013–2017
Dibromoacetic Acid	1.31 µg/L No EPA limit set	1/9	SYR4	2013–2019
Dichloroacetic Acid	1.09 µg/L No EPA limit set	1/9	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	1.31 µg/L 2.2% of the EPA limit 60 µg/L	1/9	SYR4	2013–2019

79 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: AYALA, CARLA
Phone: 636-528-4712
Email: [email protected]

Frequently asked questions about Troy

Is Troy tap water safe to drink?

EPA monitoring detected 22 contaminants in Troy'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 Troy's water?

EPA monitoring detected Copper, Nitrate-Nitrite, Lead, Combined Radium (-226 And -228), Lead, and others. The full list with the level and data source for each is above.

How many people does Troy serve?

Troy reports serving 15,000 people in Missouri, per its EPA record.

Has Troy had any water quality violations?

The EPA has 55 violations on file for Troy, of which 47 are health-based (a contaminant limit or required treatment was breached) and 0 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.