Clark Addition Water System, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Clark Addition Water System at a glance
Clark Addition Water System serves about 189 people through 71 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Franklin County, Washington. EPA system ID: WA53AB809. Ask the utility on your bill for your address in their service line inventory.
Clark Addition Water System's lead record
Against the period ending 2020 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Clark Addition Water System is 7.5 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2020 | 1 ppb |
| 2017 | 7.5 ppb |
Where this result ranks
Of the 2,218 Washington systems with a lead result, the median latest reading is 1 ppb; 18 are over 15 ppb right now and 62 have gone over at some point. Clark Addition Water System's reported as 0 (not detected) sits at the 21st percentile in Washington and the 15th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Franklin County
30 other systems share Franklin County; 10 of them have a higher latest lead result than Clark Addition Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pasco Water Department | 115,102 | 1.9 ppb |
| Connell City Of | 5,150 | 1 ppb |
| Basin City Water Sewer District | 1,740 | 0 (not detected) |
| Mesa Water Department | 495 | 4.5 ppb |
| White Bluff Water Association | 386 | 0.2 ppb |
| Ringold Domestic Water Corp | 340 | 0 (not detected) |
| West Mesa Domestic Water Assn | 316 | 0 (not detected) |
| Kahlotus City Of | 262 | 0 (not detected) |
| Cypress Country Estates | 253 | 0 (not detected) |
| West 15 Domestic Water Assn | 150 | 1.3 ppb |
What to do in your house
Look up your address in Clark Addition Water System's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Clark Addition Water System 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. The lead result guide covers how utilities pick the homes they sample. A zero today does not rule out a jump later - the rules are tightening in 2027.