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Tap water quality report

Cathay City of

EPA monitoring tested this supplier for 65 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

65
contaminants tested
15
detected
43
people served
48
health-based violations
North Dakota rankingsLead in North DakotaPFAS in North Dakota
Water source
Ground water
Ownership
Local government
Counties served
Wells

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.

48
health-based violations
149
violations on file
3
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-03-12
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 2018-08-01 → 2018-08-31
MCL Health-based Resolved 2018-08-01 → 2018-08-31
MCL Health-based Resolved 2018-08-01 → 2018-08-31
MCL Health-based Resolved 2018-08-01 → 2018-08-31
MCL Health-based Resolved 2018-05-01 → 2018-05-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0115 mg/L 77%
of the EPA limit 0.0150 mg/L
 38/38 LCR 2025
Copper
1244 µg/L 96%
of the EPA limit 1300 µg/L
worst single sample: 2940 µg/L
33/34 SYR4 2012–2019
Lead
11.5525 µg/L 77%
of the EPA limit 15 µg/L
worst single sample: 17.2 µg/L
16/34 SYR4 2012–2019
Nitrate-Nitrite
290 µg/L 2.9%
of the EPA limit 10000 µg/L
 12/16 SYR4 2012–2019
Arsenic
8.0475 µg/L 80%
of the EPA limit 10 µg/L
worst single sample: 8.08 µg/L
2/2 SYR4 2016–2017
Barium
80.1 µg/L 4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2017
Chromium
6.83 µg/L 6.8%
of the EPA limit 100 µg/L
 1/1 SYR4 2017
Combined Radium (-226 And -228)
0.2000 pCi/L 4%
of the EPA limit 5 pCi/L
 1/1 SYR4 2019
Combined Uranium
3 µg/L 10%
of the EPA limit 30 µg/L
 1/1 SYR4 2019
Dibromoacetic Acid
3.61 µg/L
No EPA limit set
 1/2 SYR4 2014–2017
Fluoride
252 µg/L 6.3%
of the EPA limit 4000 µg/L
 1/1 SYR4 2017
Monochloroacetic Acid
9.28 µg/L
No EPA limit set
 1/2 SYR4 2014–2017
Pentachlorophenol
0.0260 µg/L 2.6%
of the EPA limit 1 µg/L
 1/1 SYR4 2017
Selenium
5.39 µg/L 11%
of the EPA limit 50 µg/L
 1/1 SYR4 2017
Total Haloacetic Acids (HAA5)
12.89 µg/L 21%
of the EPA limit 60 µg/L
 1/2 SYR4 2014–2017
50 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDibromochloromethaneDichloroacetic AcidDinosebEndrinEthylbenzeneGross Alpha, Excl. Radon And UHeptachlorHeptachlor EpoxideLassoMercuryMethoxychlorMonobromoacetic AcidPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
WIEDRICH, KATHY
Phone
701-399-9527
Email
[email protected]

Frequently asked questions about Cathay City of

Is Cathay City of tap water safe to drink?

EPA monitoring detected 15 contaminants in Cathay 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 Cathay City of's water?

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

How many people does Cathay City of serve?

Cathay City of reports serving 43 people in North Dakota, per its EPA record.

Has Cathay City of had any water quality violations?

The EPA has 149 violations on file for Cathay City of, of which 48 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.