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Tap water quality report

Standing Rock Rural Water

EPA monitoring tested this supplier for 103 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

103
contaminants tested
15
detected
6,839
people served
42
health-based violations
North Dakota rankingsLead in North DakotaPFAS in North Dakota
Water source
Surface water
Ownership
Federal government

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.

42
health-based violations
116
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2024-10-19
MCL Health-based Resolved 2007-10-01 → 2007-12-31
MCL Health-based Resolved 2007-07-01 → 2007-09-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-04-01 → 2007-06-30
MCL Health-based Resolved 2007-01-01 → 2007-03-31
MCL Health-based Resolved 2007-01-01 → 2007-03-31
MCL Health-based Resolved 2007-01-01 → 2007-03-31
MCL Health-based Resolved 2006-10-01 → 2006-12-31

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
TTHM
60.179 µg/L 75%
of the EPA limit 80 µg/L
worst single sample: 113.5 µg/L
40/40 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
28.7775 µg/L 48%
of the EPA limit 60 µg/L
worst single sample: 38.47 µg/L
40/40 SYR4 2012–2019
Copper
76.685 µg/L 5.9%
of the EPA limit 1300 µg/L
worst single sample: 81.6 µg/L
22/40 SYR4 2018–2019
Nitrate-Nitrite
180 µg/L 1.8%
of the EPA limit 10000 µg/L
 16/18 SYR4 2012–2019
Lead
0.0063 mg/L 42%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Lead
2.1225 µg/L 14%
of the EPA limit 15 µg/L
worst single sample: 2.13 µg/L
6/40 SYR4 2018–2019
Lithium
60 µg/L
No EPA limit set
 4/4 UCMR-5 2024
Cyanide
14.8 µg/L 7.4%
of the EPA limit 200 µg/L
worst single sample: 15 µg/L
3/8 SYR4 2012–2019
Combined Radium (-226 And -228)
2.0249 pCi/L 40%
of the EPA limit 5 pCi/L
worst single sample: 2.1 pCi/L
2/2 SYR4 2013–2019
Barium
12.2 µg/L 0.6%
of the EPA limit 2000 µg/L
 1/1 SYR4 2013
Bromodichloromethane
5.04 µg/L
No EPA limit set
 1/1 SYR4 2017
Chloroform
14.8 µg/L
No EPA limit set
 1/1 SYR4 2017
Dibromochloromethane
1.27 µg/L
No EPA limit set
 1/1 SYR4 2017
Fluoride
350 µg/L 8.8%
of the EPA limit 4000 µg/L
 1/1 SYR4 2013
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/1 SYR4 2013
88 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BAILEY, RANDEZ
Phone
701-854-7477
Email
[email protected]

Frequently asked questions about Standing Rock Rural Water

Is Standing Rock Rural Water tap water safe to drink?

EPA monitoring detected 15 contaminants in Standing Rock Rural Water'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 Standing Rock Rural Water's water?

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

How many people does Standing Rock Rural Water serve?

Standing Rock Rural Water reports serving 6,839 people in North Dakota, per its EPA record.

Has Standing Rock Rural Water had any water quality violations?

The EPA has 116 violations on file for Standing Rock Rural Water, of which 42 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.