San Rafael, PR
Lead detected, under the action levels
Latest 90th-percentile lead: 6 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.
About San Rafael
San Rafael serves about 1,426 people through 534 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Arecibo Municipio County, PR. EPA system ID: PR0003892. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2023 (5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for San Rafael is 6 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 6 ppb |
| 2023 | 5 ppb |
| 2022 | 6 ppb |
| 2022 | 6 ppb |
| 2021 | 6 ppb |
| 2021 | 3 ppb |
Against other PR systems
Of the 111 PR systems with a lead result, the median latest reading is 5 ppb; 10 are over 15 ppb right now and 16 have gone over at some point. San Rafael's 6 ppb sits at the 57th percentile in PR and the 93rd nationally (higher means more lead).
Neighbouring systems
9 other systems share Arecibo Municipio County; 0 of them have a higher latest lead result than San Rafael. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Arecibo Urbano | 61,626 | 6 ppb |
| Santana | 19,657 | - |
| Sabana Hoyos | 15,948 | - |
| Garrochales | 7,465 | 6 ppb |
| Miraflores | 5,612 | 6 ppb |
| Bajadero | 3,402 | 6 ppb |
| Esperanza | 2,259 | - |
| Campamento Penal Sabana Hoyos | 800 | - |
| Rio Arriba | 734 | - |
What to do in your house
Test your own tap with a certified lab first-draw sample; Arecibo, PR 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 San Rafael 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.