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Tap water quality report

Louisville City of

EPA monitoring tested this supplier for 108 contaminants and detected 23. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
23
detected
20,975
people served
10
health-based violations
Colorado rankingsLead in ColoradoPFAS in Colorado
Water source
Surface water
Ownership
Local government
Counties served
Boulder

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
141
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31
TT Health-based Resolved 2021-12-01 → 2021-12-31

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
60.4 µg/L 76%
of the EPA limit 80 µg/L
worst single sample: 79.5 µg/L
268/268 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
29.46 µg/L 49%
of the EPA limit 60 µg/L
worst single sample: 47.5 µg/L
268/268 SYR4 2012–2019
Chlorite
445.5 µg/L 45%
of the EPA limit 1000 µg/L
worst single sample: 579 µg/L
130/136 SYR4 2012–2019
Bromodichloromethane
7.63 µg/L
No EPA limit set
worst single sample: 8 µg/L
48/48 SYR4 2017–2019
Chloroform
58.665 µg/L
No EPA limit set
worst single sample: 70.2 µg/L
48/48 SYR4 2017–2019
Dichloroacetic Acid
15.965 µg/L
No EPA limit set
worst single sample: 19.1 µg/L
48/48 SYR4 2017–2019
Trichloroacetic Acid
9.13 µg/L
No EPA limit set
worst single sample: 9.7 µg/L
48/48 SYR4 2017–2019
Fluoride
790 µg/L 20%
of the EPA limit 4000 µg/L
worst single sample: 1140 µg/L
41/41 SYR4 2012–2019
Dibromochloromethane
1.84 µg/L
No EPA limit set
worst single sample: 2 µg/L
33/48 SYR4 2017–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 23/23 LCR 2025
Monochloroacetic Acid
2.49 µg/L
No EPA limit set
worst single sample: 2.8 µg/L
22/48 SYR4 2017–2019
Barium
43.25 µg/L 2.2%
of the EPA limit 2000 µg/L
worst single sample: 44 µg/L
16/16 SYR4 2012–2019
Nitrate
116 µg/L 1.2%
of the EPA limit 10000 µg/L
 12/32 SYR4 2012–2019
Arsenic
0.7660 µg/L 7.7%
of the EPA limit 10 µg/L
worst single sample: 1 µg/L
7/16 SYR4 2012–2019
Selenium
0.8180 µg/L 1.6%
of the EPA limit 50 µg/L
worst single sample: 0.9000 µg/L
5/16 SYR4 2012–2019
Antimony, Total
0.0695 µg/L 1.2%
of the EPA limit 6 µg/L
worst single sample: 0.0700 µg/L
2/16 SYR4 2012–2019
Chromium
0.4495 µg/L 0.4%
of the EPA limit 100 µg/L
worst single sample: 0.4500 µg/L
2/16 SYR4 2012–2019
Combined Radium (-226 And -228)
0.9800 pCi/L 20%
of the EPA limit 5 pCi/L
worst single sample: 1 pCi/L
2/2 SYR4 2017
Dichloromethane
0.3200 µg/L 6.4%
of the EPA limit 5 µg/L
 2/16 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
0.3950 pCi/L 2.6%
of the EPA limit 15 pCi/L
worst single sample: 0.4000 pCi/L
2/2 SYR4 2017
Dibromoacetic Acid
1.1 µg/L
No EPA limit set
 1/48 SYR4 2017–2019
Monobromoacetic Acid
2.2 µg/L
No EPA limit set
 1/48 SYR4 2017–2019
Xylenes, Total
0.2800 µg/L 0%
of the EPA limit 10000 µg/L
 1/16 SYR4 2012–2019
85 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-PF3ONSAdonaAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitrate-NitriteNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PETERSON, CORY
Phone
303-335-4610
Email
[email protected]

Frequently asked questions about Louisville City of

Is Louisville City of tap water safe to drink?

EPA monitoring detected 23 contaminants in Louisville 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 Louisville City of's water?

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

How many people does Louisville City of serve?

Louisville City of reports serving 20,975 people in Colorado, per its EPA record.

Has Louisville City of had any water quality violations?

The EPA has 141 violations on file for Louisville City of, of which 10 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.