Metals
Manganese in U.S. tap water
112 public water systems across 28 U.S. states report Manganese in their annual Consumer Confidence Report. 8 sit at or above the federal limit.
What it is
A naturally occurring metal from soil and rock.
Why it's regulated
No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.
At or above the federal limit (8)
| Water system | Measured | vs. limit |
|---|---|---|
| Green Bay, WI 2024 annual report | 0.3 mg/L | 60.0× the limit |
| Kent, WA 2024 annual report | 0.51 | 10.2× the limit |
| New Bedford, MA 2024 annual report | 300 ug/L | 6.0× the limit |
| Jersey City, NJ 2024 annual report | 1.4 ug/L | 3.5× the limit |
| Kansas City, KS 2024 annual report | 0.59 ug/L | 1.5× the limit |
| Clarksville, TN 2024 annual report | 200 ug/L | 1.3× the limit |
| Joliet, IL 2024 annual report | 0–200 ug/L | 1.3× the limit |
| Torrance, CA 2024 annual report | 0–58 ug/L | 1.2× the limit |
Approaching the limit (1)
| Water system | Measured | vs. limit |
|---|---|---|
| Huntington Beach, CA 2025 annual report | 47 ug/L | 0.9× the limit |
Within the federal limit (68)
| Water system | Measured |
|---|---|
| Lakewood, NJ 2025 annual report | 34 ug/L |
| Fairfield, CA 2024 annual report | 24 ug/L |
| Albany, NY 2024 annual report | 0–129.2 |
| Santa Rosa, CA 2024 annual report | 0–8.3 ug/L |
| Elizabeth, NJ 2024 annual report | 0.02 mg/L |
| Columbia, SC 2024 annual report | 14.6 ug/L |
| Tracy, CA 2024 annual report | 13 ug/L |
| Vacaville, CA 2024 annual report | 13 ug/L |
| Chula Vista Sweetwater, CA 2024 annual report | 0–10 ug/L |
| Rialto, CA 2024 annual report | 9.5 ug/L |
| Chula Vista Otay, CA 2024 annual report | 0–9.2 ug/L |
| Columbia, MO 2024 annual report | 0.00842 mg/L |
| Ventura, CA 2023 annual report | 0.0083 mg/L |
| Charlotte, NC 2024 annual report | 7.7 ug/L |
| Manchester, NH 2024 annual report | 3.9–7.5 ug/L |
| Sugar Land, TX 2024 annual report | 6.3 ug/L |
| San Diego, CA 2023 annual report | 6.1 ug/L |
| Springfield, MA 2024 annual report | 5.99 ug/L |
| Fishers, IN 2024 annual report | 0.0051 mg/L |
| Indianapolis, IN 2024 annual report | 0.0051 mg/L |
| Morgan County, IN 2024 annual report | 0.0051 mg/L |
| Westfield, IN 2024 annual report | 0.0051 mg/L |
| Arvada, CO 2024 annual report | 0.005 mg/L |
| Dallas, TX 2024 annual report | 2.7 ug/L |
| Brownsville, TX 2024 annual report | 0.0027 mg/L |
| Lakewood, CO 2024 annual report | 2.5 ug/L |
| Madison, WI 2024 annual report | 2.5 ug/L |
| Salt Lake City, UT 2024 annual report | 2.4 |
| Escondido, CA 2024 annual report | 2.1 ug/L |
| St George, UT 2024 annual report | 2 ug/L |
| Irvine, CA 2023 annual report | 1.6 ug/L |
| Nashville, TN 2023 annual report | 0.0012 |
| Glendale, CA 2024 annual report | 1 ug/L |
| Fontana, CA 2024 annual report | 0.12 ug/L |
| Allentown, PA 2024 annual report | Not detected mg/L |
| Catoosa Utility District Authority, TN 2025 annual report | Not detected mg/L |
| Chattanooga, TN 2025 annual report | Not detected mg/L |
| City of Hemet, CA 2024 annual report | Not detected ug/L |
| City of Menifee, CA 2024 annual report | Not detected ug/L |
| City of Murrieta, CA 2024 annual report | Not detected ug/L |
| City of Perris, CA 2024 annual report | Not detected ug/L |
| City of San Jacinto, CA 2024 annual report | Not detected ug/L |
| City of Temecula, CA 2024 annual report | Not detected ug/L |
| Cleveland, OH 2024 annual report | Not detected |
| Daly City, CA 2024 annual report | Not detected ug/L |
| East Ridge, TN 2025 annual report | Not detected mg/L |
| East Valley Service Area, CA 2024 annual report | Not detected ug/L |
| Elder Mountain, TN 2025 annual report | Not detected mg/L |
| Fort Oglethorpe, TN 2025 annual report | Not detected mg/L |
| Hayward, CA 2024 annual report | Not detected ug/L |
Showing 50 of 68. The full list is in the JSON API.
Frequently asked
+What is Manganese?
A naturally occurring metal from soil and rock. No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.
+What is the federal limit for Manganese in drinking water?
The federal MCL for Manganese is 300 . The EPA enforces this against the regulated reporting statistic (typically a running annual average or 90th percentile), not a single-sample spike.
+How many U.S. water systems have Manganese over the federal limit?
8 of the 112 public water systems on The Water Map report Manganese at or above its federal limit, spanning 28 U.S. states. The full list is on this page.
+How can I check if Manganese is in my city's tap water?
Search your city on The Water Map (https://www.thewatermap.com/) or browse the list on this page. Every U.S. public water utility is required to publish an annual Consumer Confidence Report that lists every contaminant it measured, including Manganese.