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Tap water quality report

Thirty-Three Mile Road I&S District

EPA monitoring tested this supplier for 3 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

3
contaminants tested
3
detected
100
people served
0
health-based violations
Wyoming rankingsLead in WyomingPFAS in Wyoming
Water source
SWP
Ownership
Local government
Counties served
Natrona

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.

0
health-based violations
6
violations on file
1
still open
ViolationTypeStatusPeriod
Other Monitoring Unaddressed 2025-07-01
MR Monitoring Resolved 2024-12-30
MR Monitoring Resolved 2012-10-01
Other Monitoring Resolved 2011-07-01
Other Monitoring Resolved 2011-07-01
MR Monitoring Resolved 2009-07-01 → 2009-09-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
993 µg/L 76%
of the EPA limit 1300 µg/L
worst single sample: 1020 µg/L
10/10 SYR4 2015–2018
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2024
Lead
1.9 µg/L 13%
of the EPA limit 15 µg/L
worst single sample: 2 µg/L
3/10 SYR4 2015–2018

Utility contact

Contact
RIETZ, CHARLES CORY
Phone
307-277-1700
Email
[email protected]

Frequently asked questions about Thirty-Three Mile Road I&S District

Is Thirty-Three Mile Road I&S District tap water safe to drink?

EPA monitoring detected 3 contaminants in Thirty-Three Mile Road I&S District'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 Thirty-Three Mile Road I&S District's water?

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

How many people does Thirty-Three Mile Road I&S District serve?

Thirty-Three Mile Road I&S District reports serving 100 people in Wyoming, per its EPA record.

Has Thirty-Three Mile Road I&S District had any water quality violations?

The EPA has 6 violations on file for Thirty-Three Mile Road I&S District, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.