Is Oswego, City of Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Labette

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.

167

health-based violations

267

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2021-07-01 → 2021-07-31
MCL	Health-based	Resolved	2021-07-01 → 2021-07-31
MCL	Health-based	Resolved	2021-07-01 → 2021-07-31
MCL	Health-based	Resolved	2021-07-01 → 2021-07-31
MCL	Health-based	Resolved	2018-03-01 → 2018-03-31
MCL	Health-based	Resolved	2018-03-01 → 2018-03-31
MCL	Health-based	Resolved	2018-03-01 → 2018-03-31
MCL	Health-based	Resolved	2018-03-01 → 2018-03-31
MCL	Health-based	Resolved	2014-07-01 → 2014-09-30
MCL	Health-based	Resolved	2014-07-01 → 2014-09-30

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
Chlorite	814 µg/L 81% of the EPA limit 1000 µg/L worst single sample: 3300 µg/L	247/288	SYR4	2012–2019
Copper	144.5 µg/L 11% of the EPA limit 1300 µg/L worst single sample: 620 µg/L	118/118	SYR4	2012–2019
Lead	11.46 µg/L 76% of the EPA limit 15 µg/L worst single sample: 24 µg/L	45/118	SYR4	2012–2019
Bromodichloromethane	28.9 µg/L No EPA limit set worst single sample: 38 µg/L	32/32	SYR4	2012–2019
Chloroform	85.9 µg/L No EPA limit set worst single sample: 89 µg/L	32/32	SYR4	2012–2019
Dibromochloromethane	12.9 µg/L No EPA limit set worst single sample: 15 µg/L	32/32	SYR4	2012–2019
Dichloroacetic Acid	40.2 µg/L No EPA limit set worst single sample: 90 µg/L	32/32	SYR4	2012–2019
TTHM	110 µg/L 138% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 130 µg/L	32/32	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	94.45 µg/L 157% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 210 µg/L	32/32	SYR4	2012–2019
Trichloroacetic Acid	55.35 µg/L No EPA limit set worst single sample: 110 µg/L	32/32	SYR4	2012–2019
Monochloroacetic Acid	6.7 µg/L No EPA limit set worst single sample: 10 µg/L	31/32	SYR4	2012–2019
Dibromoacetic Acid	3.65 µg/L No EPA limit set worst single sample: 3.9 µg/L	26/32	SYR4	2012–2019
Nitrate	1950 µg/L 20% of the EPA limit 10000 µg/L worst single sample: 2200 µg/L	26/30	SYR4	2012–2019
Monobromoacetic Acid	1.6 µg/L No EPA limit set worst single sample: 1.8 µg/L	21/32	SYR4	2012–2019
Atrazine	7.525 µg/L 251% of the EPA limit, at the 95th percentile of samples — 3 µg/L worst single sample: 10 µg/L	16/26	SYR4	2012–2019
Lead	0.0032 mg/L 21% of the EPA limit 0.0150 mg/L	12/12	LCR	2024
Bromoform	2.2 µg/L No EPA limit set worst single sample: 2.3 µg/L	11/32	SYR4	2012–2019
Barium	104.75 µg/L 5.2% of the EPA limit 2000 µg/L worst single sample: 110 µg/L	8/8	SYR4	2012–2019
Chromium	2.425 µg/L 2.4% of the EPA limit 100 µg/L worst single sample: 2.5 µg/L	4/8	SYR4	2012–2019
Fluoride	189.5 µg/L 4.7% of the EPA limit 4000 µg/L worst single sample: 190 µg/L	2/8	SYR4	2012–2019
Selenium	1.295 µg/L 2.6% of the EPA limit 50 µg/L worst single sample: 1.3 µg/L	2/8	SYR4	2012–2019
Arsenic	1.1 µg/L 11% of the EPA limit 10 µg/L	1/8	SYR4	2012–2019
Ethylbenzene	0.7600 µg/L 0.1% of the EPA limit 700 µg/L	1/3	SYR4	2013–2017
Xylenes, Total	3.8 µg/L 0% of the EPA limit 10000 µg/L	1/3	SYR4	2013–2017

39 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneEthylene DibromideEndrinHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: JURGENSEN, CALVIN
Phone: 620-795-4433
Email: cjurgensen@oswegoks.com

Frequently asked questions about Oswego, City of

Is Oswego, City of tap water safe to drink?

EPA monitoring detected 24 contaminants in Oswego, 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 Oswego, City of's water?

EPA monitoring detected Chlorite, Copper, Lead, Bromodichloromethane, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Oswego, City of serve?

Oswego, City of reports serving 1,680 people in Kansas, per its EPA record.

Has Oswego, City of had any water quality violations?

The EPA has 267 violations on file for Oswego, City of, of which 167 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.