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Sewage treatment plant, major discharger, Billerica, Massachusetts. NPDES permit MA0101711, in force until Feb 28, 2029. Last 12 months: over a limit 11 times (last June 2026), 3 required values missing, 19 of 29 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Aluminum, total [as Al], monthly average | 560.5 ug/L | ≤ 507 ug/L | 11% |
| December 2025 | LC50 Static 48Hr Acute Ceriodaphnia dubia, daily minimum | 50 % | ≥ 100 % | 50% |
| March 2026 | E. coli, colony forming units [CFU], daily maximum | 1203 CFU/100mL | ≤ 409 CFU/100mL | 194% |
| March 2026 | LC50 Static 48Hr Acute Ceriodaphnia dubia, daily minimum | 25.9 % | ≥ 100 % | 74% |
| March 2026 | NOEC Static Renewal 7Day Chronic Ceriodaphnia dubia, daily minimum | 6.25 % | ≥ 30 % | 79% |
| May 2026 | Aluminum, total [as Al], monthly average | 527.5 ug/L | ≤ 507 ug/L | 4% |
| May 2026 | Nitrogen, ammonia total [as N], daily maximum | 18.6 mg/L | ≤ 9 mg/L | 107% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 12.56 mg/L | ≤ 5 mg/L | 151% |
| May 2026 | Nitrogen, ammonia total [as N], weekly average | 18.6 mg/L | ≤ 6 mg/L | 210% |
| June 2026 | LC50 Static 48Hr Acute Ceriodaphnia dubia, daily minimum | 11.3 % | ≥ 100 % | 89% |
| June 2026 | NOEC Static Renewal 7Day Chronic Ceriodaphnia dubia, daily minimum | 6.25 % | ≥ 30 % | 79% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | Apr–Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1389 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 2083 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.3 SU | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1389 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 2083 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 6 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Apr–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Apr–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Apr–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .2 mg/L | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 9.3 lb/d | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 46.3 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct | 001 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 001 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | monthly average | ≤ 507 ug/L | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | rolling average | ≤ 5.55 MGD | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 36 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 63 ug/L | all year | 001 |
| E. coli, colony forming units [CFU] | monthly geometric mean | ≤ 126 CFU/100mL | all year | 001 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 409 CFU/100mL | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| NOEC Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | ≥ 30 % | all year | 001 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | ≥ 100 % | all year | 001 |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorobutanoic acid (PFBA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorobutanoic acid (PFBA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorobutanoic acid (PFBA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorooctanesulfonamide (PFOSA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonamide (PFOSA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonamide (PFOSA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoropentanoic acid (PFPeA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoropentanoic acid (PFPeA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoropentanoic acid (PFPeA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorohexanoic acid (PFHxA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorohexanoic acid (PFHxA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorohexanoic acid (PFHxA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoroundecanoic acid (PFUnA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroundecanoic acid (PFUnA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroundecanoic acid (PFUnA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorododecanoic acid (PFDoA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorododecanoic acid (PFDoA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorododecanoic acid (PFDoA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorotridecanoic acid (PFTrDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorotridecanoic acid (PFTrDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorotridecanoic acid (PFTrDA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorotetradecanoic acid (PFTeDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorotetradecanoic acid (PFTeDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorotetradecanoic acid (PFTeDA) | daily maximum | report only (ng/g) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | daily maximum | report only (ng/L) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | daily maximum | report only (ng/L) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | daily maximum | report only (ng/g) | all year | PFAS |
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | daily maximum | report only (ng/L) | all year | PFAS |
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | daily maximum | report only (ng/L) | all year | PFAS |
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | daily maximum | report only (ng/g) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | daily maximum | report only (ng/g) | all year | PFAS |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorodecanesulfonic acid (PFDS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanesulfonic acid (PFDS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanesulfonic acid (PFDS) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoroheptanesulfonic acid (PFHpS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroheptanesulfonic acid (PFHpS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroheptanesulfonic acid (PFHpS) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/g) | all year | PFAS |
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | daily maximum | report only (ng/L) | all year | PFAS |
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | daily maximum | report only (ng/L) | all year | PFAS |
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | daily maximum | report only (ng/g) | all year | PFAS |
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | daily maximum | report only (ng/L) | all year | PFAS |
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | daily maximum | report only (ng/L) | all year | PFAS |
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | daily maximum | report only (ng/g) | all year | PFAS |
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | daily maximum | report only (ng/L) | all year | PFAS |
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | daily maximum | report only (ng/L) | all year | PFAS |
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoropentanesulfonic acid (PFPeS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoropentanesulfonic acid (PFPeS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoropentanesulfonic acid (PFPeS) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorononanesulfonic acid (PFNS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorononanesulfonic acid (PFNS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorononanesulfonic acid (PFNS) | daily maximum | report only (ng/g) | all year | PFAS |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/L) | all year | PFAS |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/L) | all year | PFAS |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/g) | all year | PFAS |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | daily maximum | report only (ng/L) | all year | PFAS |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | daily maximum | report only (ng/L) | all year | PFAS |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorododecanesulfonic acid (PFDoS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorododecanesulfonic acid (PFDoS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorododecanesulfonic acid (PFDoS) | daily maximum | report only (ng/g) | all year | PFAS |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | daily maximum | report only (ng/L) | all year | PFAS |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | daily maximum | report only (ng/L) | all year | PFAS |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | daily maximum | report only (ng/g) | all year | PFAS |
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | daily maximum | report only (ng/g) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | daily maximum | report only (ng/L) | all year | PFAS |
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | daily maximum | report only (ng/g) | all year | PFAS |
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | daily maximum | report only (ng/L) | all year | PFAS |
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | daily maximum | report only (ng/L) | all year | PFAS |
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | daily maximum | report only (ng/g) | all year | PFAS |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | daily maximum | report only (ng/L) | all year | PFAS |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | daily maximum | report only (ng/L) | all year | PFAS |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | daily maximum | report only (ng/g) | all year | PFAS |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | daily maximum | report only (ng/L) | all year | PFAS |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | daily maximum | report only (ng/L) | all year | PFAS |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | daily maximum | report only (ng/g) | all year | PFAS |
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | daily maximum | report only (ng/L) | all year | PFAS |
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | daily maximum | report only (ng/L) | all year | PFAS |
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | daily maximum | report only (ng/g) | all year | PFAS |
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | daily maximum | report only (ng/L) | all year | PFAS |
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | daily maximum | report only (ng/L) | all year | PFAS |
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | daily maximum | report only (ng/g) | all year | PFAS |
| Fluorine, adsorbable organic | daily maximum | report only (ng/L) | all year | PFAS |
| Fluorine, adsorbable organic | daily maximum | report only (ng/L) | all year | PFAS |
Cited limits by parameter: Massachusetts's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/MA0101711 · MCP: https://passage-data.com/mcp