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Tap water quality report

Evanston, City of

EPA monitoring tested this supplier for 81 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

81
contaminants tested
19
detected
11,727
people served
3
health-based violations
Wyoming rankingsLead in WyomingPFAS in Wyoming
Water source
Surface water
Ownership
Local government
Counties served
Uinta

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.

3
health-based violations
3
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1997-08-01 → 1997-08-31
MCL Health-based Archived 1991-08-01 → 1991-08-31
MCL Health-based Archived 1991-08-01 → 1991-08-31

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
78.7 µg/L 98%
of the EPA limit 80 µg/L
worst single sample: 110 µg/L
144/144 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
64.58 µg/L 108%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 78.1 µg/L
138/138 SYR4 2012–2019
Bromodichloromethane
23.3 µg/L
No EPA limit set
worst single sample: 33 µg/L
70/70 SYR4 2014–2019
Chloroform
71.46 µg/L
No EPA limit set
worst single sample: 82 µg/L
70/70 SYR4 2014–2019
Dichloroacetic Acid
25 µg/L
No EPA limit set
worst single sample: 28 µg/L
64/64 SYR4 2014–2019
Trichloroacetic Acid
43.5 µg/L
No EPA limit set
worst single sample: 48 µg/L
64/64 SYR4 2014–2019
Dibromochloromethane
7.405 µg/L
No EPA limit set
worst single sample: 8.3 µg/L
50/70 SYR4 2014–2019
Copper
174 µg/L 13%
of the EPA limit 1300 µg/L
worst single sample: 420 µg/L
47/72 SYR4 2016–2019
Dibromoacetic Acid
1.6 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
43/64 SYR4 2014–2019
Monochloroacetic Acid
2.475 µg/L
No EPA limit set
worst single sample: 3.7 µg/L
26/64 SYR4 2014–2019
Lead
5 µg/L 33%
of the EPA limit 15 µg/L
worst single sample: 6 µg/L
25/72 SYR4 2016–2019
Lead
0.00073 mg/L 4.9%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Barium
200 µg/L 10%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Monobromoacetic Acid
0.7260 µg/L
No EPA limit set
worst single sample: 0.7400 µg/L
8/64 SYR4 2014–2019
Nitrate-Nitrite
143 µg/L 1.4%
of the EPA limit 10000 µg/L
worst single sample: 150 µg/L
3/8 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
2.435 pCi/L 16%
of the EPA limit 15 pCi/L
worst single sample: 2.5 pCi/L
2/2 SYR4 2013–2019
Hexachlorocyclopentadiene
0.1285 µg/L 0.3%
of the EPA limit 50 µg/L
worst single sample: 0.1300 µg/L
2/7 SYR4 2013–2019
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
 1/8 SYR4 2012–2019
Combined Uranium
0.7000 µg/L 2.3%
of the EPA limit 30 µg/L
 1/2 SYR4 2013–2019
62 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideLassoMercuryMethoxychlorNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LONSWAY, BRIAN
Phone
307-789-2906
Email
[email protected]

Frequently asked questions about Evanston, City of

Is Evanston, City of tap water safe to drink?

EPA monitoring detected 19 contaminants in Evanston, 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 Evanston, City of's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Chloroform, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Evanston, City of serve?

Evanston, City of reports serving 11,727 people in Wyoming, per its EPA record.

Has Evanston, City of had any water quality violations?

The EPA has 3 violations on file for Evanston, City of, of which 3 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.