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Tap water quality report

Petersburg

EPA monitoring tested this supplier for 48 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

48
contaminants tested
15
detected
3,218
people served
4
health-based violations
Alaska rankingsLead in AlaskaPFAS in Alaska
Water source
Surface water
Ownership
Native American

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.

4
health-based violations
47
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2006-07-01 → 2006-09-30
TT Health-based Resolved 2006-04-01 → 2006-06-30
TT Health-based Archived 1999-08-01 → 1999-08-31
TT Health-based Resolved 1995-11-01 → 1995-11-30
MON Monitoring Resolved 2024-08-01 → 2024-08-31
MR Monitoring Resolved 2024-08-01 → 2024-08-31
MR Monitoring Resolved 2024-08-01 → 2024-08-31
Other Monitoring Resolved 2011-12-08
MR Monitoring Archived 2006-05-01 → 2006-05-31
MR Monitoring Resolved 2005-04-01 → 2005-04-30

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
Dichloroacetic Acid
20.075 µg/L
No EPA limit set
worst single sample: 21 µg/L
58/58 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
62.39 µg/L 104%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 70.6 µg/L
58/58 SYR4 2012–2019
Trichloroacetic Acid
51.15 µg/L
No EPA limit set
worst single sample: 54.4 µg/L
58/58 SYR4 2012–2019
Chloroform
77.6 µg/L
No EPA limit set
worst single sample: 100 µg/L
57/57 SYR4 2012–2019
TTHM
78.5 µg/L 98%
of the EPA limit 80 µg/L
worst single sample: 100 µg/L
57/57 SYR4 2012–2019
Copper
25 µg/L 1.9%
of the EPA limit 1300 µg/L
worst single sample: 33.4 µg/L
29/30 SYR4 2012–2018
Bromodichloromethane
1.085 µg/L
No EPA limit set
worst single sample: 1.4 µg/L
24/57 SYR4 2012–2019
Lead
0.0035 mg/L 23%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2024
Lead
5.9365 µg/L 40%
of the EPA limit 15 µg/L
worst single sample: 6.4 µg/L
10/30 SYR4 2012–2018
Monochloroacetic Acid
2.88 µg/L
No EPA limit set
worst single sample: 2.9 µg/L
3/58 SYR4 2012–2019
Xylenes, Total
1.0175 µg/L 0%
of the EPA limit 10000 µg/L
worst single sample: 1.03 µg/L
2/8 SYR4 2012–2019
Barium
8.8 µg/L 0.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Combined Radium (-226 And -228)
0.1910 pCi/L 3.8%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
Dibromoacetic Acid
3.5 µg/L
No EPA limit set
 1/58 SYR4 2012–2019
Fluoride
700 µg/L 18%
of the EPA limit 4000 µg/L
 1/1 SYR4 2019
33 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBenzeneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDibromochloromethaneEthylbenzeneMercuryMonobromoacetic AcidNitrate-NitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MAROHL, AARON
Phone
907-772-5432
Email
[email protected]

Frequently asked questions about Petersburg

Is Petersburg tap water safe to drink?

EPA monitoring detected 15 contaminants in Petersburg'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 Petersburg's water?

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

How many people does Petersburg serve?

Petersburg reports serving 3,218 people in Alaska, per its EPA record.

Has Petersburg had any water quality violations?

The EPA has 47 violations on file for Petersburg, of which 4 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.