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Tap water quality report

Coralville Lake Terrace

EPA monitoring tested this supplier for 58 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

58
contaminants tested
7
detected
340
people served
113
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Private
Counties served
Johnson

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.

113
health-based violations
320
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 2002-09-01 → 2002-09-30
MCL Health-based Resolved 2002-07-01 → 2002-07-31
MCL Health-based Resolved 2002-07-01 → 2002-07-31
MCL Health-based Resolved 2002-07-01 → 2002-07-31
MCL Health-based Resolved 2002-06-01 → 2002-06-30
MCL Health-based Resolved 2002-06-01 → 2002-06-30
MCL Health-based Resolved 2002-06-01 → 2002-06-30

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
Nitrate
6800 µg/L 68%
of the EPA limit 10000 µg/L
worst single sample: 7000 µg/L
52/64 SYR4 2012–2019
Copper
328.5 µg/L 25%
of the EPA limit 1300 µg/L
worst single sample: 400 µg/L
12/15 SYR4 2012–2018
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2024
Lead
5.75 µg/L 38%
of the EPA limit 15 µg/L
worst single sample: 6 µg/L
6/15 SYR4 2012–2018
Barium
149 µg/L 7.5%
of the EPA limit 2000 µg/L
worst single sample: 150 µg/L
2/2 SYR4 2015
Fluoride
248 µg/L 6.2%
of the EPA limit 4000 µg/L
worst single sample: 250 µg/L
2/2 SYR4 2015
Combined Radium (-226 And -228)
1.1 pCi/L 22%
of the EPA limit 5 pCi/L
 1/2 SYR4 2014
51 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, TotalArsenicAtrazineBenzeneBenzo(A)PyreneBromodichloromethaneBromoformChlorobenzeneCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEthylbenzeneLassoMercuryMonobromoacetic AcidMonochloroacetic AcidPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CORALVILLE LAKE TERRACE
Phone
319-325-8213
Email
[email protected]

Frequently asked questions about Coralville Lake Terrace

Is Coralville Lake Terrace tap water safe to drink?

EPA monitoring detected 7 contaminants in Coralville Lake Terrace'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 Coralville Lake Terrace's water?

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

How many people does Coralville Lake Terrace serve?

Coralville Lake Terrace reports serving 340 people in Iowa, per its EPA record.

Has Coralville Lake Terrace had any water quality violations?

The EPA has 320 violations on file for Coralville Lake Terrace, of which 113 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.