Is Water District 1 of Johnson Co Tap Water Safe? Quality Report

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

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
MR	Monitoring	Resolved	2002-01-01 → 2002-12-31
MR	Monitoring	Resolved	2002-01-01 → 2002-12-31
MR	Monitoring	Resolved	2002-01-01 → 2002-12-31
Other	Monitoring	Resolved	2001-07-01
Other	Monitoring	Resolved	2000-07-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfba	0.0053 µg/L	1/11	2025

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	410 µg/L 41% of the EPA limit 1000 µg/L worst single sample: 530 µg/L	454/575	SYR4	2012–2019
TTHM	37.77 µg/L 47% of the EPA limit 80 µg/L worst single sample: 53 µg/L	383/385	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	28.57 µg/L 48% of the EPA limit 60 µg/L worst single sample: 37.1 µg/L	383/384	SYR4	2012–2019
Fluoride	707 µg/L 18% of the EPA limit 4000 µg/L worst single sample: 740 µg/L	107/109	SYR4	2012–2019
Nitrate	2300 µg/L 23% of the EPA limit 10000 µg/L worst single sample: 3300 µg/L	98/110	SYR4	2012–2019
Copper	19.44 µg/L 1.5% of the EPA limit 1300 µg/L worst single sample: 23.7 µg/L	65/87	SYR4	2012–2019
Lead	4.9 µg/L 33% of the EPA limit 15 µg/L worst single sample: 6.5 µg/L	37/87	SYR4	2012–2019
Barium	44 µg/L 2.2% of the EPA limit 2000 µg/L worst single sample: 110 µg/L	31/31	SYR4	2012–2019
Chromium	2.9 µg/L 2.9% of the EPA limit 100 µg/L worst single sample: 3 µg/L	24/31	SYR4	2012–2019
Selenium	2.885 µg/L 5.8% of the EPA limit 50 µg/L worst single sample: 3.2 µg/L	24/31	SYR4	2012–2019
Lead	0.0065 mg/L 43% of the EPA limit 0.0150 mg/L	22/22	LCR	2023
Atrazine	0.5000 µg/L 17% of the EPA limit 3 µg/L	19/27	SYR4	2012–2019
Bromodichloromethane	7.405 µg/L No EPA limit set worst single sample: 8 µg/L	18/19	SYR4	2012–2018
Chloroform	27.425 µg/L No EPA limit set worst single sample: 37.2 µg/L	18/19	SYR4	2012–2018
Arsenic	1.77 µg/L 18% of the EPA limit 10 µg/L worst single sample: 1.9 µg/L	14/31	SYR4	2012–2019
Dibromochloromethane	3.68 µg/L No EPA limit set worst single sample: 4.7 µg/L	13/20	SYR4	2012–2018
Lithium	50.9 µg/L No EPA limit set	10/11	UCMR-5	2025
Cyanide	30 µg/L 15% of the EPA limit 200 µg/L	1/19	SYR4	2012–2018
Nitrate-Nitrite	1000 µg/L 10% of the EPA limit 10000 µg/L	1/3	SYR4	2014

87 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: TOTZKE, GREG
Phone: 913-895-5841
Email: [email protected]

Frequently asked questions about Water District 1 of Johnson Co

Is Water District 1 of Johnson Co tap water safe to drink?

EPA monitoring detected 20 contaminants in Water District 1 of Johnson Co'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 Water District 1 of Johnson Co's water?

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

How many people does Water District 1 of Johnson Co serve?

Water District 1 of Johnson Co reports serving 490,000 people in Kansas, per its EPA record.

Has Water District 1 of Johnson Co had any water quality violations?

The EPA has 5 violations on file for Water District 1 of Johnson Co, 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.