Tap WaterIndex

← Washington

Tap water quality report

Montesano City of

EPA monitoring tested this supplier for 86 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

86
contaminants tested
11
detected
6,204
people served
3
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Grays Harbor

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
25
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2006-11-01 → 2006-11-30
MCL Health-based Archived 2004-04-01 → 2004-04-30
MCL Health-based Archived 1994-06-01 → 1994-06-30
Other Monitoring Resolved 2022-07-01
MR Monitoring Resolved 2022-01-01 → 2022-12-31
MR Monitoring Resolved 2022-01-01 → 2022-12-31
Other Monitoring Resolved 2012-07-01
MR Monitoring Resolved 2007-10-01 → 2007-12-31
MR Monitoring Resolved 2007-10-01 → 2007-12-31
MR Monitoring Resolved 2007-10-01 → 2007-12-31

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
Nitrate
1465 µg/L 15%
of the EPA limit 10000 µg/L
worst single sample: 1500 µg/L
28/28 SYR4 2012–2019
Lead
0.0036 mg/L 24%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
TTHM
2.174 µg/L 2.7%
of the EPA limit 80 µg/L
worst single sample: 2.3 µg/L
4/4 SYR4 2015–2019
Dibromochloromethane
0.8610 µg/L
No EPA limit set
worst single sample: 0.8900 µg/L
3/11 SYR4 2014–2019
Fluoride
1731.5 µg/L 43%
of the EPA limit 4000 µg/L
worst single sample: 1770 µg/L
2/3 SYR4 2013–2019
Lead
1.95 µg/L 13%
of the EPA limit 15 µg/L
worst single sample: 2 µg/L
2/3 SYR4 2013–2019
Nitrate-Nitrite
1400 µg/L 14%
of the EPA limit 10000 µg/L
 2/3 SYR4 2013–2019
Bromodichloromethane
0.5700 µg/L
No EPA limit set
 1/11 SYR4 2014–2019
Bromoform
1.4 µg/L
No EPA limit set
 1/10 SYR4 2014–2019
Copper
50 µg/L 3.8%
of the EPA limit 1300 µg/L
 1/3 SYR4 2013–2019
Chloroform
0.4000 µg/L
No EPA limit set
 1/11 SYR4 2014–2019
75 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosBariumBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDichloroacetic AcidDinosebEthylbenzeneHfpo-DaMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Michael Olden, P.E.

Frequently asked questions about Montesano City of

Is Montesano City of tap water safe to drink?

EPA monitoring detected 11 contaminants in Montesano 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 Montesano City of's water?

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

How many people does Montesano City of serve?

Montesano City of reports serving 6,204 people in Washington, per its EPA record.

Has Montesano City of had any water quality violations?

The EPA has 25 violations on file for Montesano 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.