What was found in Marysville's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 97000 µg/L 970% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2017 | 2/4 | SYR4 |
| Nitrate | 250 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019
Highest in the city: 700 µg/L — RIVER HIGHLANDS CSD · 200 people · 2019 | 2/4 | SYR4 |
| Barium | 168.05 µg/L 8.4% of the EPA limit 2000 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2017 | 3/4 | SYR4 |
| Fluoride | 135 µg/L 3.4% of the EPA limit 4000 µg/L Highest in the city: COUNTRYSIDE MOBILE HOME PARK · 185 people · 2013 | 1/4 | SYR4 |
| Nitrite | 97.5 µg/L 9.8% of the EPA limit 1000 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2017 | 2/4 | SYR4 |
| Copper | 2.24 µg/L 0.2% of the EPA limit 1300 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2017
Highest in the city: 17 µg/L — RIVER HIGHLANDS CSD · 200 people · 2016 | 2/4 | SYR4 |
| TTHM | 17 µg/L 21% of the EPA limit 80 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.55 µg/L 16% of the EPA limit 60 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Monochloroacetic Acid | 8.7 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Arsenic | 3.544 µg/L 35% of the EPA limit 10 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2017
Highest in the city: 8.5 µg/L — RIVER HIGHLANDS CSD · 200 people · 2018 | 2/4 | SYR4 |
| Dibromochloromethane | 6.45 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Bromoform | 5.47 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| cis-1,2-Dichloroethylene | 5.32 µg/L 7.6% of the EPA limit 70 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Benzene | 4.48 µg/L 90% of the EPA limit 5 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Bromodichloromethane | 4 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Chloroform | 3.1 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Dichloroacetic Acid | 1.82 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 1.74 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Trichloroacetic Acid | 1.46 µg/L No EPA limit set Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2019 | 1/4 | SYR4 |
| Thallium, Total | 0.6500 µg/L 33% of the EPA limit 2 µg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2017 | 1/4 | SYR4 |
| Lead | 0.0017 mg/L 11% of the EPA limit 0.0150 mg/L Main supplier: LINDA COUNTY WATER DISTRICT · 21,654 people · 2025
Highest in the city: 0.0025 mg/L — COUNTRYSIDE MOBILE HOME PARK · 185 people · 2024 | 4/4 | LCR |
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 the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Marysville
| Supplier | Population served |
|---|---|
| LINDA COUNTY WATER DISTRICT | 21,654 |
| RIVER HIGHLANDS CSD | 200 |
| CASTLEWOOD MOBILE HOME PARK | 200 |
| COUNTRYSIDE MOBILE HOME PARK | 185 |
Frequently asked questions about Marysville tap water
Is Marysville tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Marysville. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Marysville?
4 public water suppliers report drinking-water monitoring for Marysville, California to the EPA. Each is listed above with its population served.
What contaminants are in Marysville's water?
The contaminants EPA monitoring detected in Marysville include Nitrate-Nitrite, Nitrate, Barium, Fluoride, Nitrite. The full list, with the level at the main supplier and the data source, is in the table above.
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.