Is Colby, City of Tap Water Safe? Quality Report

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

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

114

violations on file

still open

Violation	Type	Status	Period
Other	Monitoring	Resolved	2019-11-02
Other	Monitoring	Resolved	2019-11-02
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31
MR	Monitoring	Resolved	2018-01-01 → 2018-03-31

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
Nitrate	9200 µg/L 92% of the EPA limit 10000 µg/L worst single sample: 11000 µg/L	244/246	SYR4	2012–2019
Copper	390 µg/L 30% of the EPA limit 1300 µg/L worst single sample: 490 µg/L	84/87	SYR4	2012–2018
Lead	9.2 µg/L 61% of the EPA limit 15 µg/L worst single sample: 28 µg/L	29/87	SYR4	2012–2018
Arsenic	4.37 µg/L 44% of the EPA limit 10 µg/L worst single sample: 4.7 µg/L	27/27	SYR4	2012–2018
Barium	137 µg/L 6.9% of the EPA limit 2000 µg/L worst single sample: 150 µg/L	27/27	SYR4	2012–2018
Fluoride	1700 µg/L 43% of the EPA limit 4000 µg/L	27/27	SYR4	2012–2018
Selenium	7.14 µg/L 14% of the EPA limit 50 µg/L worst single sample: 7.5 µg/L	27/27	SYR4	2012–2018
Chromium	6.76 µg/L 6.8% of the EPA limit 100 µg/L worst single sample: 26 µg/L	25/27	SYR4	2012–2018
Lithium	68 µg/L No EPA limit set	18/18	UCMR-5	2023
Lead	0.0013 mg/L 8.7% of the EPA limit 0.0150 mg/L	13/13	LCR	2024
Combined Radium (-226 And -228)	1.65 pCi/L 33% of the EPA limit 5 pCi/L worst single sample: 1.7 pCi/L	11/17	SYR4	2013–2019
Atrazine	4.5 µg/L 150% of the EPA limit, at the 95th percentile of samples — 3 µg/L worst single sample: 5.1 µg/L	9/72	SYR4	2014–2019
Bromodichloromethane	2.96 µg/L No EPA limit set worst single sample: 3.3 µg/L	5/6	SYR4	2013–2019
Bromoform	13.6 µg/L No EPA limit set worst single sample: 15 µg/L	5/6	SYR4	2013–2019
Dibromoacetic Acid	1.9 µg/L No EPA limit set	5/6	SYR4	2013–2019
Dibromochloromethane	6.3 µg/L No EPA limit set worst single sample: 6.4 µg/L	5/6	SYR4	2013–2019
TTHM	21.6 µg/L 27% of the EPA limit 80 µg/L worst single sample: 23 µg/L	5/6	SYR4	2013–2019
Carbon Tetrachloride	1.427 µg/L 29% of the EPA limit 5 µg/L worst single sample: 1.5 µg/L	3/33	SYR4	2014–2019
Chloroform	1.078 µg/L No EPA limit set worst single sample: 1.1 µg/L	2/6	SYR4	2013–2019
Monobromoacetic Acid	2.2 µg/L No EPA limit set	1/6	SYR4	2013–2019
Tetrachloroethylene	0.5500 µg/L 11% of the EPA limit 5 µg/L	1/33	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	4.1 µg/L 6.8% of the EPA limit 60 µg/L	1/6	SYR4	2013–2019

59 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCadmiumDichloromethaneDichloroacetic AcidEthylene DibromideEthylbenzeneHfpo-DaLassoMercuryMonochloroacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaStyreneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: WEBER, OMAR
Phone: 785-460-4420
Email: [email protected]

Frequently asked questions about Colby, City of

Is Colby, City of tap water safe to drink?

EPA monitoring detected 22 contaminants in Colby, City of'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 Colby, City of's water?

EPA monitoring detected Nitrate, Copper, Lead, Arsenic, Barium, and others. The full list with the level and data source for each is above.

How many people does Colby, City of serve?

Colby, City of reports serving 5,516 people in Kansas, per its EPA record.

Has Colby, City of had any water quality violations?

The EPA has 114 violations on file for Colby, City of, of which 0 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.