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Tap water quality report

Carson

EPA monitoring tested this supplier for 58 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

58
contaminants tested
10
detected
3,015
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Surface water
Ownership
Local government
Counties served
Skamania

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.

0
health-based violations
593
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2025-04-01 → 2025-04-30
MR Monitoring Resolved 2025-04-01 → 2025-04-30
MR Monitoring Resolved 2025-04-01 → 2025-04-30
MON Monitoring Resolved 2023-09-01 → 2023-09-30
MON Monitoring Resolved 2022-05-01 → 2022-05-31
MR Monitoring Resolved 2022-05-01 → 2022-05-31
MR Monitoring Resolved 2022-05-01 → 2022-05-31
MR Monitoring Resolved 2017-01-01 → 2017-03-31
MR Monitoring Resolved 2017-01-01 → 2017-03-31
MR Monitoring Resolved 2016-01-01 → 2016-03-31

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
Chloroform
6.4 µg/L
No EPA limit set
worst single sample: 11 µg/L
21/28 SYR4 2012–2019
TTHM
7.379 µg/L 9.2%
of the EPA limit 80 µg/L
worst single sample: 12.3 µg/L
20/20 SYR4 2012–2019
Bromodichloromethane
1.0595 µg/L
No EPA limit set
worst single sample: 1.3 µg/L
14/23 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
7.515 µg/L 13%
of the EPA limit 60 µg/L
worst single sample: 7.9 µg/L
12/21 SYR4 2012–2019
Trichloroacetic Acid
4.82 µg/L
No EPA limit set
worst single sample: 5.7 µg/L
12/21 SYR4 2012–2019
Dichloroacetic Acid
2.7 µg/L
No EPA limit set
worst single sample: 3.1 µg/L
11/21 SYR4 2012–2019
Lead
0.0015 mg/L 10%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2023
Nitrate
1510 µg/L 15%
of the EPA limit 10000 µg/L
 6/24 SYR4 2012–2019
Bromoform
0.5600 µg/L
No EPA limit set
 1/23 SYR4 2012–2019
Dibromochloromethane
0.8200 µg/L
No EPA limit set
 1/23 SYR4 2012–2019
48 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosBariumBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDinosebEthylene DibromideEthylbenzeneFluorideLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitrate-NitriteNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
S John Shields

Frequently asked questions about Carson

Is Carson tap water safe to drink?

EPA monitoring detected 10 contaminants in Carson'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 Carson's water?

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

How many people does Carson serve?

Carson reports serving 3,015 people in Washington, per its EPA record.

Has Carson had any water quality violations?

The EPA has 593 violations on file for Carson, of which 0 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.