Tap WaterIndex

← North Dakota

Tap water quality report

St John 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
341
people served
10
health-based violations
North Dakota rankingsLead in North DakotaPFAS in North Dakota
Water source
Ground water
Ownership
Local government
Counties served
Rolette

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.

10
health-based violations
20
violations on file
2
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-07-01 → 2010-07-31
MCL Health-based Resolved 2010-07-01 → 2010-07-31
MCL Health-based Resolved 2010-07-01 → 2010-07-31
MCL Health-based Resolved 2010-07-01 → 2010-07-31
MCL Health-based Archived 1996-06-01 → 1996-06-30
MCL Health-based Archived 1996-06-01 → 1996-06-30
MCL Health-based Archived 1996-06-01 → 1996-06-30
MCL Health-based Archived 1993-04-01 → 1993-04-30
MCL Health-based Archived 1993-04-01 → 1993-04-30
MCL Health-based Archived 1993-04-01 → 1993-04-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Copper
459.9 µg/L 35%
of the EPA limit 1300 µg/L
worst single sample: 483 µg/L
15/15 SYR4 2013–2019
Lead
16.22 µg/L 108%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 17.3 µg/L
13/15 SYR4 2013–2019
Nitrate-Nitrite
540 µg/L 5.4%
of the EPA limit 10000 µg/L
 8/16 SYR4 2012–2019
Combined Radium (-226 And -228)
0.8340 pCi/L 17%
of the EPA limit 5 pCi/L
worst single sample: 0.8700 pCi/L
5/5 SYR4 2015–2017
Combined Uranium
12.63 µg/L 42%
of the EPA limit 30 µg/L
worst single sample: 12.81 µg/L
5/5 SYR4 2015–2017
Gross Alpha, Excl. Radon And U
16.866 pCi/L 112%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
worst single sample: 17.13 pCi/L
2/5 SYR4 2015–2017
TTHM
0.5780 µg/L 0.7%
of the EPA limit 80 µg/L
worst single sample: 0.5800 µg/L
2/2 SYR4 2014–2017
Barium
1.98 µg/L 0.1%
of the EPA limit 2000 µg/L
 1/1 SYR4 2017
Chloroform
0.5400 µg/L
No EPA limit set
 1/1 SYR4 2017
Chromium
19.7 µg/L 20%
of the EPA limit 100 µg/L
 1/1 SYR4 2017
Dibromoacetic Acid
1.04 µg/L
No EPA limit set
 1/1 SYR4 2017
Fluoride
267 µg/L 6.7%
of the EPA limit 4000 µg/L
 1/1 SYR4 2017
Selenium
1.23 µg/L 2.5%
of the EPA limit 50 µg/L
 1/1 SYR4 2017
Total Haloacetic Acids (HAA5)
1.04 µg/L 1.7%
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, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbon TetrachlorideChlordaneDichloromethaneDalaponDibromochloromethaneDichloroacetic AcidDinosebEndrinEthylbenzeneHeptachlorHeptachlor EpoxideLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BRUCE, SARAH
Phone
701-477-3060
Email
[email protected]

Frequently asked questions about St John City of

Is St John City of tap water safe to drink?

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

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

How many people does St John City of serve?

St John City of reports serving 341 people in North Dakota, per its EPA record.

Has St John City of had any water quality violations?

The EPA has 20 violations on file for St John City of, of which 10 are health-based (a contaminant limit or required treatment was breached) and 2 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.