Plymouth Utilities, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 6.17 ppb (monitoring period 2023-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Plymouth Utilities at a glance
Plymouth Utilities serves about 8,964 people through 3,139 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Sheboygan County, Wisconsin. EPA system ID: WI4600446. Ask the utility on your bill for your address in their service line inventory.
Plymouth Utilities's lead record
That is down 1.61 ppb from 7.78 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Plymouth Utilities is 7.78 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 6.17 ppb |
| 2020 | 7.78 ppb |
| 2017 | 7.41 ppb |
Against other Wisconsin systems
Of the 947 Wisconsin systems with a lead result, the median latest reading is 1.33 ppb; 6 are over 15 ppb right now and 71 have gone over at some point. Plymouth Utilities's 6.17 ppb sits at the 92nd percentile in Wisconsin and the 94th nationally (higher means more lead).
Neighbouring systems
16 other systems share Sheboygan County; 2 of them have a higher latest lead result than Plymouth Utilities. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sheboygan Water Utilities | 49,931 | 2.2 ppb |
| Sheboygan Falls Utilities | 8,687 | 5.4 ppb |
| Sheboygan Tn Waterworks | 4,596 | 2.9 ppb |
| Oostburg Waterworks | 3,110 | 10.5 ppb |
| Kohler Waterworks | 2,271 | 0.82 ppb |
| Cedar Grove Waterworks | 2,213 | 8.9 ppb |
| Random Lake Waterworks | 1,594 | 0.53 ppb |
| Elkhart Lake Waterworks | 1,567 | 0.54 ppb |
| Kettle Moraine Correctional Institution | 1,544 | 0.34 ppb |
| Lakeland University | 1,200 | 3.22 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Plymouth, WI may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Plymouth Utilities whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.