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Tap water quality report

Epcor - Parker Dam

EPA monitoring tested this supplier for 80 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
18
detected
429
people served
35
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Surface water
Ownership
Private
Counties served
La Paz

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.

35
health-based violations
349
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2020-10-01 → 2020-10-31
TT Health-based Resolved 2020-10-01 → 2020-10-31
TT Health-based Resolved 2020-10-01 → 2020-10-31
TT Health-based Resolved 2020-09-01 → 2020-09-30
TT Health-based Resolved 2020-09-01 → 2020-09-30
TT Health-based Resolved 2020-09-01 → 2020-09-30
TT Health-based Resolved 2020-09-01 → 2020-09-30
TT Health-based Resolved 2020-09-01 → 2020-09-30
TT Health-based Resolved 2020-09-01 → 2020-09-30
TT Health-based Resolved 2020-08-01 → 2020-08-31

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
Copper
1065 µg/L 82%
of the EPA limit 1300 µg/L
worst single sample: 1430 µg/L
88/88 SYR4 2012–2019
TTHM
98.45 µg/L 123%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 115 µg/L
50/50 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
35.05 µg/L 58%
of the EPA limit 60 µg/L
worst single sample: 45.4 µg/L
47/49 SYR4 2012–2019
Lead
12.36 µg/L 82%
of the EPA limit 15 µg/L
worst single sample: 17 µg/L
43/88 SYR4 2012–2019
Nitrate
400 µg/L 4%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2023
Bromodichloromethane
25.9 µg/L
No EPA limit set
worst single sample: 30.4 µg/L
11/11 SYR4 2019
Bromoform
1.85 µg/L
No EPA limit set
worst single sample: 2 µg/L
11/11 SYR4 2019
Chloroform
39 µg/L
No EPA limit set
worst single sample: 49.9 µg/L
11/11 SYR4 2019
Dibromochloromethane
15.95 µg/L
No EPA limit set
worst single sample: 17.8 µg/L
11/11 SYR4 2019
Dichloroacetic Acid
13.1 µg/L
No EPA limit set
worst single sample: 14.3 µg/L
9/11 SYR4 2019
Trichloroacetic Acid
10.86 µg/L
No EPA limit set
worst single sample: 12.3 µg/L
9/11 SYR4 2019
Dibromoacetic Acid
3.17 µg/L
No EPA limit set
worst single sample: 3.2 µg/L
7/11 SYR4 2019
Arsenic
2.68 µg/L 27%
of the EPA limit 10 µg/L
worst single sample: 2.7 µg/L
2/2 SYR4 2019
Barium
119.5 µg/L 6%
of the EPA limit 2000 µg/L
worst single sample: 120 µg/L
2/2 SYR4 2019
Fluoride
319 µg/L 8%
of the EPA limit 4000 µg/L
worst single sample: 320 µg/L
2/2 SYR4 2019
Nitrate-Nitrite
289 µg/L 2.9%
of the EPA limit 10000 µg/L
worst single sample: 290 µg/L
2/2 SYR4 2013–2019
Selenium
3.4 µg/L 6.8%
of the EPA limit 50 µg/L
 1/2 SYR4 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-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DIDOMIZIO, TOM
Phone
623-445-2431
Email
[email protected]

Frequently asked questions about Epcor - Parker Dam

Is Epcor - Parker Dam tap water safe to drink?

EPA monitoring detected 18 contaminants in Epcor - Parker Dam'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 Epcor - Parker Dam's water?

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

How many people does Epcor - Parker Dam serve?

Epcor - Parker Dam reports serving 429 people in Arizona, per its EPA record.

Has Epcor - Parker Dam had any water quality violations?

The EPA has 349 violations on file for Epcor - Parker Dam, of which 35 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.